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Posted to common-user@hadoop.apache.org by "Adaryl \"Bob\" Wakefield, MBA" <ad...@hotmail.com> on 2015/11/03 18:51:04 UTC
hadoop not using whole disk for HDFS
I’ve got the Hortonworks distro running on a three node cluster. For some reason the disk available for HDFS is MUCH less than the total disk space. Both of my data nodes have 3TB hard drives. Only 100GB of that is being used for HDFS. Is it possible that I have a setting wrong somewhere?
B.
Re: hadoop not using whole disk for HDFS
Posted by "Adaryl \"Bob\" Wakefield, MBA" <ad...@hotmail.com>.
dfs.datanode.data.dir = /hadoop/hdfs/data,/hdfs/data
Data node 1:
Filesystem Size Used Avail Use% Mounted on
/dev/mapper/centos-root 50G 12G 39G 23% /
devtmpfs 16G 0 16G 0% /dev
tmpfs 16G 0 16G 0% /dev/shm
tmpfs 16G 1.4G 15G 9% /run
tmpfs 16G 0 16G 0% /sys/fs/cgroup
/dev/sda2 494M 123M 372M 25% /boot
/dev/mapper/centos-home 2.7T 33M 2.7T 1% /home
data node 2:
Filesystem Size Used Avail Use% Mounted on
/dev/mapper/centos-root 50G 24G 27G 48% /
devtmpfs 16G 0 16G 0% /dev
tmpfs 16G 24K 16G 1% /dev/shm
tmpfs 16G 97M 16G 1% /run
tmpfs 16G 0 16G 0% /sys/fs/cgroup
/dev/sda2 494M 124M 370M 26% /boot
/dev/mapper/centos-home 2.7T 33M 2.7T 1% /home
Adaryl "Bob" Wakefield, MBA
Principal
Mass Street Analytics, LLC
913.938.6685
www.linkedin.com/in/bobwakefieldmba
Twitter: @BobLovesData
From: iain wright
Sent: Thursday, November 05, 2015 7:56 PM
To: user@hadoop.apache.org
Subject: Re: hadoop not using whole disk for HDFS
Please post:
- output of df -h from every datanode in your cluster
- what dfs.datanode.data.dir is currently set too
--
Iain Wright
This email message is confidential, intended only for the recipient(s) named above and may contain information that is privileged, exempt from disclosure under applicable law. If you are not the intended recipient, do not disclose or disseminate the message to anyone except the intended recipient. If you have received this message in error, or are not the named recipient(s), please immediately notify the sender by return email, and delete all copies of this message.
On Thu, Nov 5, 2015 at 5:24 PM, Adaryl "Bob" Wakefield, MBA <ad...@hotmail.com> wrote:
Is there a maximum amount of disk space that HDFS will use? Is 100GB that max? When we’re supposed to be dealing with “big data” why is the amount of data to be held on any one box such a small number when you’ve got terabytes available?
Adaryl "Bob" Wakefield, MBA
Principal
Mass Street Analytics, LLC
913.938.6685
www.linkedin.com/in/bobwakefieldmba
Twitter: @BobLovesData
From: Adaryl "Bob" Wakefield, MBA
Sent: Wednesday, November 04, 2015 4:38 PM
To: user@hadoop.apache.org
Subject: Re: hadoop not using whole disk for HDFS
This is an experimental cluster and there isn’t anything I can’t lose. I ran into some issues. I’m running the Hortonworks distro and am managing things through Ambari.
1. I wasn’t able to set the config to /home/hdfs/data. I got an error that told me I’m not allowed to set that config to the /home directory. So I made it /hdfs/data.
2. When I restarted, the space available increased by a whopping 100GB.
Adaryl "Bob" Wakefield, MBA
Principal
Mass Street Analytics, LLC
913.938.6685
www.linkedin.com/in/bobwakefieldmba
Twitter: @BobLovesData
From: Naganarasimha G R (Naga)
Sent: Wednesday, November 04, 2015 4:26 PM
To: user@hadoop.apache.org
Subject: RE: hadoop not using whole disk for HDFS
Better would be to stop the daemons and copy the data from /hadoop/hdfs/data to /home/hdfs/data , reconfigure dfs.datanode.data.dir to /home/hdfs/data and then start the daemons. If the data is comparitively less !
Ensure you have the backup if have any critical data !
Regards,
+ Naga
------------------------------------------------------------------------------
From: Adaryl "Bob" Wakefield, MBA [adaryl.wakefield@hotmail.com]
Sent: Thursday, November 05, 2015 03:40
To: user@hadoop.apache.org
Subject: Re: hadoop not using whole disk for HDFS
So like I can just create a new folder in the home directory like:
home/hdfs/data
and then set dfs.datanode.data.dir to:
/hadoop/hdfs/data,home/hdfs/data
Restart the node and that should do it correct?
Adaryl "Bob" Wakefield, MBA
Principal
Mass Street Analytics, LLC
913.938.6685
www.linkedin.com/in/bobwakefieldmba
Twitter: @BobLovesData
From: Naganarasimha G R (Naga)
Sent: Wednesday, November 04, 2015 3:59 PM
To: user@hadoop.apache.org
Subject: RE: hadoop not using whole disk for HDFS
Hi Bob,
Seems like you have configured to disk dir to be other than an folder in /home, if so try creating another folder and add to "dfs.datanode.data.dir" seperated by comma instead of trying to reset the default.
And its also advised not to use the root partition "/" to be configured for HDFS data dir, if the Dir usage hits the maximum then OS might fail to function properly.
Regards,
+ Naga
------------------------------------------------------------------------------
From: P lva [ruvikal@gmail.com]
Sent: Thursday, November 05, 2015 03:11
To: user@hadoop.apache.org
Subject: Re: hadoop not using whole disk for HDFS
What does your dfs.datanode.data.dir point to ?
On Wed, Nov 4, 2015 at 4:14 PM, Adaryl "Bob" Wakefield, MBA <ad...@hotmail.com> wrote:
Filesystem Size Used Avail Use% Mounted on
/dev/mapper/centos-root 50G 12G 39G 23% /
devtmpfs 16G 0 16G 0% /dev
tmpfs 16G 0 16G 0% /dev/shm
tmpfs 16G 1.4G 15G 9% /run
tmpfs 16G 0 16G 0% /sys/fs/cgroup
/dev/sda2 494M 123M 372M 25% /boot
/dev/mapper/centos-home 2.7T 33M 2.7T 1% /home
That’s from one datanode. The second one is nearly identical. I discovered that 50GB is actually a default. That seems really weird. Disk space is cheap. Why would you not just use most of the disk and why is it so hard to reset the default?
Adaryl "Bob" Wakefield, MBA
Principal
Mass Street Analytics, LLC
913.938.6685
www.linkedin.com/in/bobwakefieldmba
Twitter: @BobLovesData
From: Chris Nauroth
Sent: Wednesday, November 04, 2015 12:16 PM
To: user@hadoop.apache.org
Subject: Re: hadoop not using whole disk for HDFS
How are those drives partitioned? Is it possible that the directories pointed to by the dfs.datanode.data.dir property in hdfs-site.xml reside on partitions that are sized to only 100 GB? Running commands like df would be a good way to check this at the OS level, independently of Hadoop.
--Chris Nauroth
From: MBA <ad...@hotmail.com>
Reply-To: "user@hadoop.apache.org" <us...@hadoop.apache.org>
Date: Tuesday, November 3, 2015 at 11:16 AM
To: "user@hadoop.apache.org" <us...@hadoop.apache.org>
Subject: Re: hadoop not using whole disk for HDFS
Yeah. It has the current value of 1073741824 which is like 1.07 gig.
B.
From: Chris Nauroth
Sent: Tuesday, November 03, 2015 11:57 AM
To: user@hadoop.apache.org
Subject: Re: hadoop not using whole disk for HDFS
Hi Bob,
Does the hdfs-site.xml configuration file contain the property dfs.datanode.du.reserved? If this is defined, then the DataNode intentionally will not use this space for storage of replicas.
<property>
<name>dfs.datanode.du.reserved</name>
<value>0</value>
<description>Reserved space in bytes per volume. Always leave this much space free for non dfs use.
</description>
</property>
--Chris Nauroth
From: MBA <ad...@hotmail.com>
Reply-To: "user@hadoop.apache.org" <us...@hadoop.apache.org>
Date: Tuesday, November 3, 2015 at 10:51 AM
To: "user@hadoop.apache.org" <us...@hadoop.apache.org>
Subject: hadoop not using whole disk for HDFS
I’ve got the Hortonworks distro running on a three node cluster. For some reason the disk available for HDFS is MUCH less than the total disk space. Both of my data nodes have 3TB hard drives. Only 100GB of that is being used for HDFS. Is it possible that I have a setting wrong somewhere?
B.
Re: hadoop not using whole disk for HDFS
Posted by "Adaryl \"Bob\" Wakefield, MBA" <ad...@hotmail.com>.
dfs.datanode.data.dir = /hadoop/hdfs/data,/hdfs/data
Data node 1:
Filesystem Size Used Avail Use% Mounted on
/dev/mapper/centos-root 50G 12G 39G 23% /
devtmpfs 16G 0 16G 0% /dev
tmpfs 16G 0 16G 0% /dev/shm
tmpfs 16G 1.4G 15G 9% /run
tmpfs 16G 0 16G 0% /sys/fs/cgroup
/dev/sda2 494M 123M 372M 25% /boot
/dev/mapper/centos-home 2.7T 33M 2.7T 1% /home
data node 2:
Filesystem Size Used Avail Use% Mounted on
/dev/mapper/centos-root 50G 24G 27G 48% /
devtmpfs 16G 0 16G 0% /dev
tmpfs 16G 24K 16G 1% /dev/shm
tmpfs 16G 97M 16G 1% /run
tmpfs 16G 0 16G 0% /sys/fs/cgroup
/dev/sda2 494M 124M 370M 26% /boot
/dev/mapper/centos-home 2.7T 33M 2.7T 1% /home
Adaryl "Bob" Wakefield, MBA
Principal
Mass Street Analytics, LLC
913.938.6685
www.linkedin.com/in/bobwakefieldmba
Twitter: @BobLovesData
From: iain wright
Sent: Thursday, November 05, 2015 7:56 PM
To: user@hadoop.apache.org
Subject: Re: hadoop not using whole disk for HDFS
Please post:
- output of df -h from every datanode in your cluster
- what dfs.datanode.data.dir is currently set too
--
Iain Wright
This email message is confidential, intended only for the recipient(s) named above and may contain information that is privileged, exempt from disclosure under applicable law. If you are not the intended recipient, do not disclose or disseminate the message to anyone except the intended recipient. If you have received this message in error, or are not the named recipient(s), please immediately notify the sender by return email, and delete all copies of this message.
On Thu, Nov 5, 2015 at 5:24 PM, Adaryl "Bob" Wakefield, MBA <ad...@hotmail.com> wrote:
Is there a maximum amount of disk space that HDFS will use? Is 100GB that max? When we’re supposed to be dealing with “big data” why is the amount of data to be held on any one box such a small number when you’ve got terabytes available?
Adaryl "Bob" Wakefield, MBA
Principal
Mass Street Analytics, LLC
913.938.6685
www.linkedin.com/in/bobwakefieldmba
Twitter: @BobLovesData
From: Adaryl "Bob" Wakefield, MBA
Sent: Wednesday, November 04, 2015 4:38 PM
To: user@hadoop.apache.org
Subject: Re: hadoop not using whole disk for HDFS
This is an experimental cluster and there isn’t anything I can’t lose. I ran into some issues. I’m running the Hortonworks distro and am managing things through Ambari.
1. I wasn’t able to set the config to /home/hdfs/data. I got an error that told me I’m not allowed to set that config to the /home directory. So I made it /hdfs/data.
2. When I restarted, the space available increased by a whopping 100GB.
Adaryl "Bob" Wakefield, MBA
Principal
Mass Street Analytics, LLC
913.938.6685
www.linkedin.com/in/bobwakefieldmba
Twitter: @BobLovesData
From: Naganarasimha G R (Naga)
Sent: Wednesday, November 04, 2015 4:26 PM
To: user@hadoop.apache.org
Subject: RE: hadoop not using whole disk for HDFS
Better would be to stop the daemons and copy the data from /hadoop/hdfs/data to /home/hdfs/data , reconfigure dfs.datanode.data.dir to /home/hdfs/data and then start the daemons. If the data is comparitively less !
Ensure you have the backup if have any critical data !
Regards,
+ Naga
------------------------------------------------------------------------------
From: Adaryl "Bob" Wakefield, MBA [adaryl.wakefield@hotmail.com]
Sent: Thursday, November 05, 2015 03:40
To: user@hadoop.apache.org
Subject: Re: hadoop not using whole disk for HDFS
So like I can just create a new folder in the home directory like:
home/hdfs/data
and then set dfs.datanode.data.dir to:
/hadoop/hdfs/data,home/hdfs/data
Restart the node and that should do it correct?
Adaryl "Bob" Wakefield, MBA
Principal
Mass Street Analytics, LLC
913.938.6685
www.linkedin.com/in/bobwakefieldmba
Twitter: @BobLovesData
From: Naganarasimha G R (Naga)
Sent: Wednesday, November 04, 2015 3:59 PM
To: user@hadoop.apache.org
Subject: RE: hadoop not using whole disk for HDFS
Hi Bob,
Seems like you have configured to disk dir to be other than an folder in /home, if so try creating another folder and add to "dfs.datanode.data.dir" seperated by comma instead of trying to reset the default.
And its also advised not to use the root partition "/" to be configured for HDFS data dir, if the Dir usage hits the maximum then OS might fail to function properly.
Regards,
+ Naga
------------------------------------------------------------------------------
From: P lva [ruvikal@gmail.com]
Sent: Thursday, November 05, 2015 03:11
To: user@hadoop.apache.org
Subject: Re: hadoop not using whole disk for HDFS
What does your dfs.datanode.data.dir point to ?
On Wed, Nov 4, 2015 at 4:14 PM, Adaryl "Bob" Wakefield, MBA <ad...@hotmail.com> wrote:
Filesystem Size Used Avail Use% Mounted on
/dev/mapper/centos-root 50G 12G 39G 23% /
devtmpfs 16G 0 16G 0% /dev
tmpfs 16G 0 16G 0% /dev/shm
tmpfs 16G 1.4G 15G 9% /run
tmpfs 16G 0 16G 0% /sys/fs/cgroup
/dev/sda2 494M 123M 372M 25% /boot
/dev/mapper/centos-home 2.7T 33M 2.7T 1% /home
That’s from one datanode. The second one is nearly identical. I discovered that 50GB is actually a default. That seems really weird. Disk space is cheap. Why would you not just use most of the disk and why is it so hard to reset the default?
Adaryl "Bob" Wakefield, MBA
Principal
Mass Street Analytics, LLC
913.938.6685
www.linkedin.com/in/bobwakefieldmba
Twitter: @BobLovesData
From: Chris Nauroth
Sent: Wednesday, November 04, 2015 12:16 PM
To: user@hadoop.apache.org
Subject: Re: hadoop not using whole disk for HDFS
How are those drives partitioned? Is it possible that the directories pointed to by the dfs.datanode.data.dir property in hdfs-site.xml reside on partitions that are sized to only 100 GB? Running commands like df would be a good way to check this at the OS level, independently of Hadoop.
--Chris Nauroth
From: MBA <ad...@hotmail.com>
Reply-To: "user@hadoop.apache.org" <us...@hadoop.apache.org>
Date: Tuesday, November 3, 2015 at 11:16 AM
To: "user@hadoop.apache.org" <us...@hadoop.apache.org>
Subject: Re: hadoop not using whole disk for HDFS
Yeah. It has the current value of 1073741824 which is like 1.07 gig.
B.
From: Chris Nauroth
Sent: Tuesday, November 03, 2015 11:57 AM
To: user@hadoop.apache.org
Subject: Re: hadoop not using whole disk for HDFS
Hi Bob,
Does the hdfs-site.xml configuration file contain the property dfs.datanode.du.reserved? If this is defined, then the DataNode intentionally will not use this space for storage of replicas.
<property>
<name>dfs.datanode.du.reserved</name>
<value>0</value>
<description>Reserved space in bytes per volume. Always leave this much space free for non dfs use.
</description>
</property>
--Chris Nauroth
From: MBA <ad...@hotmail.com>
Reply-To: "user@hadoop.apache.org" <us...@hadoop.apache.org>
Date: Tuesday, November 3, 2015 at 10:51 AM
To: "user@hadoop.apache.org" <us...@hadoop.apache.org>
Subject: hadoop not using whole disk for HDFS
I’ve got the Hortonworks distro running on a three node cluster. For some reason the disk available for HDFS is MUCH less than the total disk space. Both of my data nodes have 3TB hard drives. Only 100GB of that is being used for HDFS. Is it possible that I have a setting wrong somewhere?
B.
Re: hadoop not using whole disk for HDFS
Posted by "Adaryl \"Bob\" Wakefield, MBA" <ad...@hotmail.com>.
dfs.datanode.data.dir = /hadoop/hdfs/data,/hdfs/data
Data node 1:
Filesystem Size Used Avail Use% Mounted on
/dev/mapper/centos-root 50G 12G 39G 23% /
devtmpfs 16G 0 16G 0% /dev
tmpfs 16G 0 16G 0% /dev/shm
tmpfs 16G 1.4G 15G 9% /run
tmpfs 16G 0 16G 0% /sys/fs/cgroup
/dev/sda2 494M 123M 372M 25% /boot
/dev/mapper/centos-home 2.7T 33M 2.7T 1% /home
data node 2:
Filesystem Size Used Avail Use% Mounted on
/dev/mapper/centos-root 50G 24G 27G 48% /
devtmpfs 16G 0 16G 0% /dev
tmpfs 16G 24K 16G 1% /dev/shm
tmpfs 16G 97M 16G 1% /run
tmpfs 16G 0 16G 0% /sys/fs/cgroup
/dev/sda2 494M 124M 370M 26% /boot
/dev/mapper/centos-home 2.7T 33M 2.7T 1% /home
Adaryl "Bob" Wakefield, MBA
Principal
Mass Street Analytics, LLC
913.938.6685
www.linkedin.com/in/bobwakefieldmba
Twitter: @BobLovesData
From: iain wright
Sent: Thursday, November 05, 2015 7:56 PM
To: user@hadoop.apache.org
Subject: Re: hadoop not using whole disk for HDFS
Please post:
- output of df -h from every datanode in your cluster
- what dfs.datanode.data.dir is currently set too
--
Iain Wright
This email message is confidential, intended only for the recipient(s) named above and may contain information that is privileged, exempt from disclosure under applicable law. If you are not the intended recipient, do not disclose or disseminate the message to anyone except the intended recipient. If you have received this message in error, or are not the named recipient(s), please immediately notify the sender by return email, and delete all copies of this message.
On Thu, Nov 5, 2015 at 5:24 PM, Adaryl "Bob" Wakefield, MBA <ad...@hotmail.com> wrote:
Is there a maximum amount of disk space that HDFS will use? Is 100GB that max? When we’re supposed to be dealing with “big data” why is the amount of data to be held on any one box such a small number when you’ve got terabytes available?
Adaryl "Bob" Wakefield, MBA
Principal
Mass Street Analytics, LLC
913.938.6685
www.linkedin.com/in/bobwakefieldmba
Twitter: @BobLovesData
From: Adaryl "Bob" Wakefield, MBA
Sent: Wednesday, November 04, 2015 4:38 PM
To: user@hadoop.apache.org
Subject: Re: hadoop not using whole disk for HDFS
This is an experimental cluster and there isn’t anything I can’t lose. I ran into some issues. I’m running the Hortonworks distro and am managing things through Ambari.
1. I wasn’t able to set the config to /home/hdfs/data. I got an error that told me I’m not allowed to set that config to the /home directory. So I made it /hdfs/data.
2. When I restarted, the space available increased by a whopping 100GB.
Adaryl "Bob" Wakefield, MBA
Principal
Mass Street Analytics, LLC
913.938.6685
www.linkedin.com/in/bobwakefieldmba
Twitter: @BobLovesData
From: Naganarasimha G R (Naga)
Sent: Wednesday, November 04, 2015 4:26 PM
To: user@hadoop.apache.org
Subject: RE: hadoop not using whole disk for HDFS
Better would be to stop the daemons and copy the data from /hadoop/hdfs/data to /home/hdfs/data , reconfigure dfs.datanode.data.dir to /home/hdfs/data and then start the daemons. If the data is comparitively less !
Ensure you have the backup if have any critical data !
Regards,
+ Naga
------------------------------------------------------------------------------
From: Adaryl "Bob" Wakefield, MBA [adaryl.wakefield@hotmail.com]
Sent: Thursday, November 05, 2015 03:40
To: user@hadoop.apache.org
Subject: Re: hadoop not using whole disk for HDFS
So like I can just create a new folder in the home directory like:
home/hdfs/data
and then set dfs.datanode.data.dir to:
/hadoop/hdfs/data,home/hdfs/data
Restart the node and that should do it correct?
Adaryl "Bob" Wakefield, MBA
Principal
Mass Street Analytics, LLC
913.938.6685
www.linkedin.com/in/bobwakefieldmba
Twitter: @BobLovesData
From: Naganarasimha G R (Naga)
Sent: Wednesday, November 04, 2015 3:59 PM
To: user@hadoop.apache.org
Subject: RE: hadoop not using whole disk for HDFS
Hi Bob,
Seems like you have configured to disk dir to be other than an folder in /home, if so try creating another folder and add to "dfs.datanode.data.dir" seperated by comma instead of trying to reset the default.
And its also advised not to use the root partition "/" to be configured for HDFS data dir, if the Dir usage hits the maximum then OS might fail to function properly.
Regards,
+ Naga
------------------------------------------------------------------------------
From: P lva [ruvikal@gmail.com]
Sent: Thursday, November 05, 2015 03:11
To: user@hadoop.apache.org
Subject: Re: hadoop not using whole disk for HDFS
What does your dfs.datanode.data.dir point to ?
On Wed, Nov 4, 2015 at 4:14 PM, Adaryl "Bob" Wakefield, MBA <ad...@hotmail.com> wrote:
Filesystem Size Used Avail Use% Mounted on
/dev/mapper/centos-root 50G 12G 39G 23% /
devtmpfs 16G 0 16G 0% /dev
tmpfs 16G 0 16G 0% /dev/shm
tmpfs 16G 1.4G 15G 9% /run
tmpfs 16G 0 16G 0% /sys/fs/cgroup
/dev/sda2 494M 123M 372M 25% /boot
/dev/mapper/centos-home 2.7T 33M 2.7T 1% /home
That’s from one datanode. The second one is nearly identical. I discovered that 50GB is actually a default. That seems really weird. Disk space is cheap. Why would you not just use most of the disk and why is it so hard to reset the default?
Adaryl "Bob" Wakefield, MBA
Principal
Mass Street Analytics, LLC
913.938.6685
www.linkedin.com/in/bobwakefieldmba
Twitter: @BobLovesData
From: Chris Nauroth
Sent: Wednesday, November 04, 2015 12:16 PM
To: user@hadoop.apache.org
Subject: Re: hadoop not using whole disk for HDFS
How are those drives partitioned? Is it possible that the directories pointed to by the dfs.datanode.data.dir property in hdfs-site.xml reside on partitions that are sized to only 100 GB? Running commands like df would be a good way to check this at the OS level, independently of Hadoop.
--Chris Nauroth
From: MBA <ad...@hotmail.com>
Reply-To: "user@hadoop.apache.org" <us...@hadoop.apache.org>
Date: Tuesday, November 3, 2015 at 11:16 AM
To: "user@hadoop.apache.org" <us...@hadoop.apache.org>
Subject: Re: hadoop not using whole disk for HDFS
Yeah. It has the current value of 1073741824 which is like 1.07 gig.
B.
From: Chris Nauroth
Sent: Tuesday, November 03, 2015 11:57 AM
To: user@hadoop.apache.org
Subject: Re: hadoop not using whole disk for HDFS
Hi Bob,
Does the hdfs-site.xml configuration file contain the property dfs.datanode.du.reserved? If this is defined, then the DataNode intentionally will not use this space for storage of replicas.
<property>
<name>dfs.datanode.du.reserved</name>
<value>0</value>
<description>Reserved space in bytes per volume. Always leave this much space free for non dfs use.
</description>
</property>
--Chris Nauroth
From: MBA <ad...@hotmail.com>
Reply-To: "user@hadoop.apache.org" <us...@hadoop.apache.org>
Date: Tuesday, November 3, 2015 at 10:51 AM
To: "user@hadoop.apache.org" <us...@hadoop.apache.org>
Subject: hadoop not using whole disk for HDFS
I’ve got the Hortonworks distro running on a three node cluster. For some reason the disk available for HDFS is MUCH less than the total disk space. Both of my data nodes have 3TB hard drives. Only 100GB of that is being used for HDFS. Is it possible that I have a setting wrong somewhere?
B.
Re: hadoop not using whole disk for HDFS
Posted by "Adaryl \"Bob\" Wakefield, MBA" <ad...@hotmail.com>.
dfs.datanode.data.dir = /hadoop/hdfs/data,/hdfs/data
Data node 1:
Filesystem Size Used Avail Use% Mounted on
/dev/mapper/centos-root 50G 12G 39G 23% /
devtmpfs 16G 0 16G 0% /dev
tmpfs 16G 0 16G 0% /dev/shm
tmpfs 16G 1.4G 15G 9% /run
tmpfs 16G 0 16G 0% /sys/fs/cgroup
/dev/sda2 494M 123M 372M 25% /boot
/dev/mapper/centos-home 2.7T 33M 2.7T 1% /home
data node 2:
Filesystem Size Used Avail Use% Mounted on
/dev/mapper/centos-root 50G 24G 27G 48% /
devtmpfs 16G 0 16G 0% /dev
tmpfs 16G 24K 16G 1% /dev/shm
tmpfs 16G 97M 16G 1% /run
tmpfs 16G 0 16G 0% /sys/fs/cgroup
/dev/sda2 494M 124M 370M 26% /boot
/dev/mapper/centos-home 2.7T 33M 2.7T 1% /home
Adaryl "Bob" Wakefield, MBA
Principal
Mass Street Analytics, LLC
913.938.6685
www.linkedin.com/in/bobwakefieldmba
Twitter: @BobLovesData
From: iain wright
Sent: Thursday, November 05, 2015 7:56 PM
To: user@hadoop.apache.org
Subject: Re: hadoop not using whole disk for HDFS
Please post:
- output of df -h from every datanode in your cluster
- what dfs.datanode.data.dir is currently set too
--
Iain Wright
This email message is confidential, intended only for the recipient(s) named above and may contain information that is privileged, exempt from disclosure under applicable law. If you are not the intended recipient, do not disclose or disseminate the message to anyone except the intended recipient. If you have received this message in error, or are not the named recipient(s), please immediately notify the sender by return email, and delete all copies of this message.
On Thu, Nov 5, 2015 at 5:24 PM, Adaryl "Bob" Wakefield, MBA <ad...@hotmail.com> wrote:
Is there a maximum amount of disk space that HDFS will use? Is 100GB that max? When we’re supposed to be dealing with “big data” why is the amount of data to be held on any one box such a small number when you’ve got terabytes available?
Adaryl "Bob" Wakefield, MBA
Principal
Mass Street Analytics, LLC
913.938.6685
www.linkedin.com/in/bobwakefieldmba
Twitter: @BobLovesData
From: Adaryl "Bob" Wakefield, MBA
Sent: Wednesday, November 04, 2015 4:38 PM
To: user@hadoop.apache.org
Subject: Re: hadoop not using whole disk for HDFS
This is an experimental cluster and there isn’t anything I can’t lose. I ran into some issues. I’m running the Hortonworks distro and am managing things through Ambari.
1. I wasn’t able to set the config to /home/hdfs/data. I got an error that told me I’m not allowed to set that config to the /home directory. So I made it /hdfs/data.
2. When I restarted, the space available increased by a whopping 100GB.
Adaryl "Bob" Wakefield, MBA
Principal
Mass Street Analytics, LLC
913.938.6685
www.linkedin.com/in/bobwakefieldmba
Twitter: @BobLovesData
From: Naganarasimha G R (Naga)
Sent: Wednesday, November 04, 2015 4:26 PM
To: user@hadoop.apache.org
Subject: RE: hadoop not using whole disk for HDFS
Better would be to stop the daemons and copy the data from /hadoop/hdfs/data to /home/hdfs/data , reconfigure dfs.datanode.data.dir to /home/hdfs/data and then start the daemons. If the data is comparitively less !
Ensure you have the backup if have any critical data !
Regards,
+ Naga
------------------------------------------------------------------------------
From: Adaryl "Bob" Wakefield, MBA [adaryl.wakefield@hotmail.com]
Sent: Thursday, November 05, 2015 03:40
To: user@hadoop.apache.org
Subject: Re: hadoop not using whole disk for HDFS
So like I can just create a new folder in the home directory like:
home/hdfs/data
and then set dfs.datanode.data.dir to:
/hadoop/hdfs/data,home/hdfs/data
Restart the node and that should do it correct?
Adaryl "Bob" Wakefield, MBA
Principal
Mass Street Analytics, LLC
913.938.6685
www.linkedin.com/in/bobwakefieldmba
Twitter: @BobLovesData
From: Naganarasimha G R (Naga)
Sent: Wednesday, November 04, 2015 3:59 PM
To: user@hadoop.apache.org
Subject: RE: hadoop not using whole disk for HDFS
Hi Bob,
Seems like you have configured to disk dir to be other than an folder in /home, if so try creating another folder and add to "dfs.datanode.data.dir" seperated by comma instead of trying to reset the default.
And its also advised not to use the root partition "/" to be configured for HDFS data dir, if the Dir usage hits the maximum then OS might fail to function properly.
Regards,
+ Naga
------------------------------------------------------------------------------
From: P lva [ruvikal@gmail.com]
Sent: Thursday, November 05, 2015 03:11
To: user@hadoop.apache.org
Subject: Re: hadoop not using whole disk for HDFS
What does your dfs.datanode.data.dir point to ?
On Wed, Nov 4, 2015 at 4:14 PM, Adaryl "Bob" Wakefield, MBA <ad...@hotmail.com> wrote:
Filesystem Size Used Avail Use% Mounted on
/dev/mapper/centos-root 50G 12G 39G 23% /
devtmpfs 16G 0 16G 0% /dev
tmpfs 16G 0 16G 0% /dev/shm
tmpfs 16G 1.4G 15G 9% /run
tmpfs 16G 0 16G 0% /sys/fs/cgroup
/dev/sda2 494M 123M 372M 25% /boot
/dev/mapper/centos-home 2.7T 33M 2.7T 1% /home
That’s from one datanode. The second one is nearly identical. I discovered that 50GB is actually a default. That seems really weird. Disk space is cheap. Why would you not just use most of the disk and why is it so hard to reset the default?
Adaryl "Bob" Wakefield, MBA
Principal
Mass Street Analytics, LLC
913.938.6685
www.linkedin.com/in/bobwakefieldmba
Twitter: @BobLovesData
From: Chris Nauroth
Sent: Wednesday, November 04, 2015 12:16 PM
To: user@hadoop.apache.org
Subject: Re: hadoop not using whole disk for HDFS
How are those drives partitioned? Is it possible that the directories pointed to by the dfs.datanode.data.dir property in hdfs-site.xml reside on partitions that are sized to only 100 GB? Running commands like df would be a good way to check this at the OS level, independently of Hadoop.
--Chris Nauroth
From: MBA <ad...@hotmail.com>
Reply-To: "user@hadoop.apache.org" <us...@hadoop.apache.org>
Date: Tuesday, November 3, 2015 at 11:16 AM
To: "user@hadoop.apache.org" <us...@hadoop.apache.org>
Subject: Re: hadoop not using whole disk for HDFS
Yeah. It has the current value of 1073741824 which is like 1.07 gig.
B.
From: Chris Nauroth
Sent: Tuesday, November 03, 2015 11:57 AM
To: user@hadoop.apache.org
Subject: Re: hadoop not using whole disk for HDFS
Hi Bob,
Does the hdfs-site.xml configuration file contain the property dfs.datanode.du.reserved? If this is defined, then the DataNode intentionally will not use this space for storage of replicas.
<property>
<name>dfs.datanode.du.reserved</name>
<value>0</value>
<description>Reserved space in bytes per volume. Always leave this much space free for non dfs use.
</description>
</property>
--Chris Nauroth
From: MBA <ad...@hotmail.com>
Reply-To: "user@hadoop.apache.org" <us...@hadoop.apache.org>
Date: Tuesday, November 3, 2015 at 10:51 AM
To: "user@hadoop.apache.org" <us...@hadoop.apache.org>
Subject: hadoop not using whole disk for HDFS
I’ve got the Hortonworks distro running on a three node cluster. For some reason the disk available for HDFS is MUCH less than the total disk space. Both of my data nodes have 3TB hard drives. Only 100GB of that is being used for HDFS. Is it possible that I have a setting wrong somewhere?
B.
Re: hadoop not using whole disk for HDFS
Posted by iain wright <ia...@gmail.com>.
Please post:
- output of df -h from every datanode in your cluster
- what dfs.datanode.data.dir is currently set too
--
Iain Wright
This email message is confidential, intended only for the recipient(s)
named above and may contain information that is privileged, exempt from
disclosure under applicable law. If you are not the intended recipient, do
not disclose or disseminate the message to anyone except the intended
recipient. If you have received this message in error, or are not the named
recipient(s), please immediately notify the sender by return email, and
delete all copies of this message.
On Thu, Nov 5, 2015 at 5:24 PM, Adaryl "Bob" Wakefield, MBA <
adaryl.wakefield@hotmail.com> wrote:
> Is there a maximum amount of disk space that HDFS will use? Is 100GB that
> max? When we’re supposed to be dealing with “big data” why is the amount of
> data to be held on any one box such a small number when you’ve got
> terabytes available?
>
> Adaryl "Bob" Wakefield, MBA
> Principal
> Mass Street Analytics, LLC
> 913.938.6685
> www.linkedin.com/in/bobwakefieldmba
> Twitter: @BobLovesData
>
> *From:* Adaryl "Bob" Wakefield, MBA <ad...@hotmail.com>
> *Sent:* Wednesday, November 04, 2015 4:38 PM
> *To:* user@hadoop.apache.org
> *Subject:* Re: hadoop not using whole disk for HDFS
>
> This is an experimental cluster and there isn’t anything I can’t lose. I
> ran into some issues. I’m running the Hortonworks distro and am managing
> things through Ambari.
>
> 1. I wasn’t able to set the config to /home/hdfs/data. I got an error that
> told me I’m not allowed to set that config to the /home directory. So I
> made it /hdfs/data.
> 2. When I restarted, the space available increased by a whopping 100GB.
>
>
>
> Adaryl "Bob" Wakefield, MBA
> Principal
> Mass Street Analytics, LLC
> 913.938.6685
> www.linkedin.com/in/bobwakefieldmba
> Twitter: @BobLovesData
>
> *From:* Naganarasimha G R (Naga) <ga...@huawei.com>
> *Sent:* Wednesday, November 04, 2015 4:26 PM
> *To:* user@hadoop.apache.org
> *Subject:* RE: hadoop not using whole disk for HDFS
>
>
> Better would be to stop the daemons and copy the data from */hadoop/hdfs/data
> *to */home/hdfs/data *, reconfigure *dfs.datanode.data.dir* to */home/hdfs/data
> *and then start the daemons. If the data is comparitively less !
>
> Ensure you have the backup if have any critical data !
>
>
>
> Regards,
>
> + Naga
> ------------------------------
> *From:* Adaryl "Bob" Wakefield, MBA [adaryl.wakefield@hotmail.com]
> *Sent:* Thursday, November 05, 2015 03:40
> *To:* user@hadoop.apache.org
> *Subject:* Re: hadoop not using whole disk for HDFS
>
> So like I can just create a new folder in the home directory like:
> home/hdfs/data
> and then set dfs.datanode.data.dir to:
> /hadoop/hdfs/data,home/hdfs/data
>
> Restart the node and that should do it correct?
>
> Adaryl "Bob" Wakefield, MBA
> Principal
> Mass Street Analytics, LLC
> 913.938.6685
> www.linkedin.com/in/bobwakefieldmba
> Twitter: @BobLovesData
>
> *From:* Naganarasimha G R (Naga) <ga...@huawei.com>
> *Sent:* Wednesday, November 04, 2015 3:59 PM
> *To:* user@hadoop.apache.org
> *Subject:* RE: hadoop not using whole disk for HDFS
>
>
> Hi Bob,
>
>
>
> Seems like you have configured to disk dir to be other than an folder in*
> /home,* if so try creating another folder and add to
> *"dfs.datanode.data.dir"* seperated by comma instead of trying to reset
> the default.
>
> And its also advised not to use the root partition "/" to be configured
> for HDFS data dir, if the Dir usage hits the maximum then OS might fail to
> function properly.
>
>
>
> Regards,
>
> + Naga
> ------------------------------
> *From:* P lva [ruvikal@gmail.com]
> *Sent:* Thursday, November 05, 2015 03:11
> *To:* user@hadoop.apache.org
> *Subject:* Re: hadoop not using whole disk for HDFS
>
> What does your dfs.datanode.data.dir point to ?
>
>
> On Wed, Nov 4, 2015 at 4:14 PM, Adaryl "Bob" Wakefield, MBA <
> adaryl.wakefield@hotmail.com> wrote:
>
>> Filesystem Size Used Avail Use% Mounted on /dev/mapper/centos-root 50G
>> 12G 39G 23% / devtmpfs 16G 0 16G 0% /dev tmpfs 16G 0 16G 0% /dev/shm
>> tmpfs 16G 1.4G 15G 9% /run tmpfs 16G 0 16G 0% /sys/fs/cgroup /dev/sda2
>> 494M 123M 372M 25% /boot /dev/mapper/centos-home 2.7T 33M 2.7T 1% /home
>>
>> That’s from one datanode. The second one is nearly identical. I
>> discovered that 50GB is actually a default. That seems really weird. Disk
>> space is cheap. Why would you not just use most of the disk and why is it
>> so hard to reset the default?
>>
>> Adaryl "Bob" Wakefield, MBA
>> Principal
>> Mass Street Analytics, LLC
>> 913.938.6685
>> www.linkedin.com/in/bobwakefieldmba
>> Twitter: @BobLovesData
>>
>> *From:* Chris Nauroth <cn...@hortonworks.com>
>> *Sent:* Wednesday, November 04, 2015 12:16 PM
>> *To:* user@hadoop.apache.org
>> *Subject:* Re: hadoop not using whole disk for HDFS
>>
>> How are those drives partitioned? Is it possible that the directories
>> pointed to by the dfs.datanode.data.dir property in hdfs-site.xml reside on
>> partitions that are sized to only 100 GB? Running commands like df would
>> be a good way to check this at the OS level, independently of Hadoop.
>>
>> --Chris Nauroth
>>
>> From: MBA <ad...@hotmail.com>
>> Reply-To: "user@hadoop.apache.org" <us...@hadoop.apache.org>
>> Date: Tuesday, November 3, 2015 at 11:16 AM
>> To: "user@hadoop.apache.org" <us...@hadoop.apache.org>
>> Subject: Re: hadoop not using whole disk for HDFS
>>
>> Yeah. It has the current value of 1073741824 which is like 1.07 gig.
>>
>> B.
>> *From:* Chris Nauroth <cn...@hortonworks.com>
>> *Sent:* Tuesday, November 03, 2015 11:57 AM
>> *To:* user@hadoop.apache.org
>> *Subject:* Re: hadoop not using whole disk for HDFS
>>
>> Hi Bob,
>>
>> Does the hdfs-site.xml configuration file contain the property
>> dfs.datanode.du.reserved? If this is defined, then the DataNode
>> intentionally will not use this space for storage of replicas.
>>
>> <property>
>> <name>dfs.datanode.du.reserved</name>
>> <value>0</value>
>> <description>Reserved space in bytes per volume. Always leave this much
>> space free for non dfs use.
>> </description>
>> </property>
>>
>> --Chris Nauroth
>>
>> From: MBA <ad...@hotmail.com>
>> Reply-To: "user@hadoop.apache.org" <us...@hadoop.apache.org>
>> Date: Tuesday, November 3, 2015 at 10:51 AM
>> To: "user@hadoop.apache.org" <us...@hadoop.apache.org>
>> Subject: hadoop not using whole disk for HDFS
>>
>> I’ve got the Hortonworks distro running on a three node cluster. For some
>> reason the disk available for HDFS is MUCH less than the total disk space.
>> Both of my data nodes have 3TB hard drives. Only 100GB of that is being
>> used for HDFS. Is it possible that I have a setting wrong somewhere?
>>
>> B.
>>
>
>
Re: hadoop not using whole disk for HDFS
Posted by "Adaryl \"Bob\" Wakefield, MBA" <ad...@hotmail.com>.
I think it might help if I had a better understanding of what I’m looking at:
/dev/mapper/centos-home 2.7T 33M 2.7T 1% /home
So /dev/mapper/centos-home is the file system and /home is where it is mounted. I’m not sure I even know what that means. Are you saying that /hdfs/data even though it’s in root that it’s still somehow pointing to /home? So confused. It’s the part amount mounting a drive to another folder..on the same disk. Is it kind of like how on Windows you can have more than one “drive” on a disk?
Adaryl "Bob" Wakefield, MBA
Principal
Mass Street Analytics, LLC
913.938.6685
www.linkedin.com/in/bobwakefieldmba
Twitter: @BobLovesData
From: Naganarasimha G R (Naga)
Sent: Thursday, November 05, 2015 7:50 PM
To: user@hadoop.apache.org
Subject: RE: hadoop not using whole disk for HDFS
Hi Bob,
1. I wasn’t able to set the config to /home/hdfs/data. I got an error that told me I’m not allowed to set that config to the /home directory. So I made it /hdfs/data.
Naga : I am not sure about the HDP Distro but if you make it point to /hdfs/data, still it will be pointing to the root mount itself i.e.
/dev/mapper/centos-root 50G 12G 39G 23% /
Other Alternative is to mount the drive to some other folder other than /home and then try.
2. When I restarted, the space available increased by a whopping 100GB.
Naga : I am particularly not sure how this happened may be you can again recheck if you enter the command "df -h <path of the NM data dir configured>" you will find out how much disk space is available on the related mount for which the path is configured.
Regards,
+ Naga
--------------------------------------------------------------------------------
From: Adaryl "Bob" Wakefield, MBA [adaryl.wakefield@hotmail.com]
Sent: Friday, November 06, 2015 06:54
To: user@hadoop.apache.org
Subject: Re: hadoop not using whole disk for HDFS
Is there a maximum amount of disk space that HDFS will use? Is 100GB that max? When we’re supposed to be dealing with “big data” why is the amount of data to be held on any one box such a small number when you’ve got terabytes available?
Adaryl "Bob" Wakefield, MBA
Principal
Mass Street Analytics, LLC
913.938.6685
www.linkedin.com/in/bobwakefieldmba
Twitter: @BobLovesData
From: Adaryl "Bob" Wakefield, MBA
Sent: Wednesday, November 04, 2015 4:38 PM
To: user@hadoop.apache.org
Subject: Re: hadoop not using whole disk for HDFS
This is an experimental cluster and there isn’t anything I can’t lose. I ran into some issues. I’m running the Hortonworks distro and am managing things through Ambari.
1. I wasn’t able to set the config to /home/hdfs/data. I got an error that told me I’m not allowed to set that config to the /home directory. So I made it /hdfs/data.
2. When I restarted, the space available increased by a whopping 100GB.
Adaryl "Bob" Wakefield, MBA
Principal
Mass Street Analytics, LLC
913.938.6685
www.linkedin.com/in/bobwakefieldmba
Twitter: @BobLovesData
From: Naganarasimha G R (Naga)
Sent: Wednesday, November 04, 2015 4:26 PM
To: user@hadoop.apache.org
Subject: RE: hadoop not using whole disk for HDFS
Better would be to stop the daemons and copy the data from /hadoop/hdfs/data to /home/hdfs/data , reconfigure dfs.datanode.data.dir to /home/hdfs/data and then start the daemons. If the data is comparitively less !
Ensure you have the backup if have any critical data !
Regards,
+ Naga
--------------------------------------------------------------------------------
From: Adaryl "Bob" Wakefield, MBA [adaryl.wakefield@hotmail.com]
Sent: Thursday, November 05, 2015 03:40
To: user@hadoop.apache.org
Subject: Re: hadoop not using whole disk for HDFS
So like I can just create a new folder in the home directory like:
home/hdfs/data
and then set dfs.datanode.data.dir to:
/hadoop/hdfs/data,home/hdfs/data
Restart the node and that should do it correct?
Adaryl "Bob" Wakefield, MBA
Principal
Mass Street Analytics, LLC
913.938.6685
www.linkedin.com/in/bobwakefieldmba
Twitter: @BobLovesData
From: Naganarasimha G R (Naga)
Sent: Wednesday, November 04, 2015 3:59 PM
To: user@hadoop.apache.org
Subject: RE: hadoop not using whole disk for HDFS
Hi Bob,
Seems like you have configured to disk dir to be other than an folder in /home, if so try creating another folder and add to "dfs.datanode.data.dir" seperated by comma instead of trying to reset the default.
And its also advised not to use the root partition "/" to be configured for HDFS data dir, if the Dir usage hits the maximum then OS might fail to function properly.
Regards,
+ Naga
--------------------------------------------------------------------------------
From: P lva [ruvikal@gmail.com]
Sent: Thursday, November 05, 2015 03:11
To: user@hadoop.apache.org
Subject: Re: hadoop not using whole disk for HDFS
What does your dfs.datanode.data.dir point to ?
On Wed, Nov 4, 2015 at 4:14 PM, Adaryl "Bob" Wakefield, MBA <ad...@hotmail.com> wrote:
Filesystem Size Used Avail Use% Mounted on
/dev/mapper/centos-root 50G 12G 39G 23% /
devtmpfs 16G 0 16G 0% /dev
tmpfs 16G 0 16G 0% /dev/shm
tmpfs 16G 1.4G 15G 9% /run
tmpfs 16G 0 16G 0% /sys/fs/cgroup
/dev/sda2 494M 123M 372M 25% /boot
/dev/mapper/centos-home 2.7T 33M 2.7T 1% /home
That’s from one datanode. The second one is nearly identical. I discovered that 50GB is actually a default. That seems really weird. Disk space is cheap. Why would you not just use most of the disk and why is it so hard to reset the default?
Adaryl "Bob" Wakefield, MBA
Principal
Mass Street Analytics, LLC
913.938.6685
www.linkedin.com/in/bobwakefieldmba
Twitter: @BobLovesData
From: Chris Nauroth
Sent: Wednesday, November 04, 2015 12:16 PM
To: user@hadoop.apache.org
Subject: Re: hadoop not using whole disk for HDFS
How are those drives partitioned? Is it possible that the directories pointed to by the dfs.datanode.data.dir property in hdfs-site.xml reside on partitions that are sized to only 100 GB? Running commands like df would be a good way to check this at the OS level, independently of Hadoop.
--Chris Nauroth
From: MBA <ad...@hotmail.com>
Reply-To: "user@hadoop.apache.org" <us...@hadoop.apache.org>
Date: Tuesday, November 3, 2015 at 11:16 AM
To: "user@hadoop.apache.org" <us...@hadoop.apache.org>
Subject: Re: hadoop not using whole disk for HDFS
Yeah. It has the current value of 1073741824 which is like 1.07 gig.
B.
From: Chris Nauroth
Sent: Tuesday, November 03, 2015 11:57 AM
To: user@hadoop.apache.org
Subject: Re: hadoop not using whole disk for HDFS
Hi Bob,
Does the hdfs-site.xml configuration file contain the property dfs.datanode.du.reserved? If this is defined, then the DataNode intentionally will not use this space for storage of replicas.
<property>
<name>dfs.datanode.du.reserved</name>
<value>0</value>
<description>Reserved space in bytes per volume. Always leave this much space free for non dfs use.
</description>
</property>
--Chris Nauroth
From: MBA <ad...@hotmail.com>
Reply-To: "user@hadoop.apache.org" <us...@hadoop.apache.org>
Date: Tuesday, November 3, 2015 at 10:51 AM
To: "user@hadoop.apache.org" <us...@hadoop.apache.org>
Subject: hadoop not using whole disk for HDFS
I’ve got the Hortonworks distro running on a three node cluster. For some reason the disk available for HDFS is MUCH less than the total disk space. Both of my data nodes have 3TB hard drives. Only 100GB of that is being used for HDFS. Is it possible that I have a setting wrong somewhere?
B.
Re: hadoop not using whole disk for HDFS
Posted by "Adaryl \"Bob\" Wakefield, MBA" <ad...@hotmail.com>.
I think it might help if I had a better understanding of what I’m looking at:
/dev/mapper/centos-home 2.7T 33M 2.7T 1% /home
So /dev/mapper/centos-home is the file system and /home is where it is mounted. I’m not sure I even know what that means. Are you saying that /hdfs/data even though it’s in root that it’s still somehow pointing to /home? So confused. It’s the part amount mounting a drive to another folder..on the same disk. Is it kind of like how on Windows you can have more than one “drive” on a disk?
Adaryl "Bob" Wakefield, MBA
Principal
Mass Street Analytics, LLC
913.938.6685
www.linkedin.com/in/bobwakefieldmba
Twitter: @BobLovesData
From: Naganarasimha G R (Naga)
Sent: Thursday, November 05, 2015 7:50 PM
To: user@hadoop.apache.org
Subject: RE: hadoop not using whole disk for HDFS
Hi Bob,
1. I wasn’t able to set the config to /home/hdfs/data. I got an error that told me I’m not allowed to set that config to the /home directory. So I made it /hdfs/data.
Naga : I am not sure about the HDP Distro but if you make it point to /hdfs/data, still it will be pointing to the root mount itself i.e.
/dev/mapper/centos-root 50G 12G 39G 23% /
Other Alternative is to mount the drive to some other folder other than /home and then try.
2. When I restarted, the space available increased by a whopping 100GB.
Naga : I am particularly not sure how this happened may be you can again recheck if you enter the command "df -h <path of the NM data dir configured>" you will find out how much disk space is available on the related mount for which the path is configured.
Regards,
+ Naga
--------------------------------------------------------------------------------
From: Adaryl "Bob" Wakefield, MBA [adaryl.wakefield@hotmail.com]
Sent: Friday, November 06, 2015 06:54
To: user@hadoop.apache.org
Subject: Re: hadoop not using whole disk for HDFS
Is there a maximum amount of disk space that HDFS will use? Is 100GB that max? When we’re supposed to be dealing with “big data” why is the amount of data to be held on any one box such a small number when you’ve got terabytes available?
Adaryl "Bob" Wakefield, MBA
Principal
Mass Street Analytics, LLC
913.938.6685
www.linkedin.com/in/bobwakefieldmba
Twitter: @BobLovesData
From: Adaryl "Bob" Wakefield, MBA
Sent: Wednesday, November 04, 2015 4:38 PM
To: user@hadoop.apache.org
Subject: Re: hadoop not using whole disk for HDFS
This is an experimental cluster and there isn’t anything I can’t lose. I ran into some issues. I’m running the Hortonworks distro and am managing things through Ambari.
1. I wasn’t able to set the config to /home/hdfs/data. I got an error that told me I’m not allowed to set that config to the /home directory. So I made it /hdfs/data.
2. When I restarted, the space available increased by a whopping 100GB.
Adaryl "Bob" Wakefield, MBA
Principal
Mass Street Analytics, LLC
913.938.6685
www.linkedin.com/in/bobwakefieldmba
Twitter: @BobLovesData
From: Naganarasimha G R (Naga)
Sent: Wednesday, November 04, 2015 4:26 PM
To: user@hadoop.apache.org
Subject: RE: hadoop not using whole disk for HDFS
Better would be to stop the daemons and copy the data from /hadoop/hdfs/data to /home/hdfs/data , reconfigure dfs.datanode.data.dir to /home/hdfs/data and then start the daemons. If the data is comparitively less !
Ensure you have the backup if have any critical data !
Regards,
+ Naga
--------------------------------------------------------------------------------
From: Adaryl "Bob" Wakefield, MBA [adaryl.wakefield@hotmail.com]
Sent: Thursday, November 05, 2015 03:40
To: user@hadoop.apache.org
Subject: Re: hadoop not using whole disk for HDFS
So like I can just create a new folder in the home directory like:
home/hdfs/data
and then set dfs.datanode.data.dir to:
/hadoop/hdfs/data,home/hdfs/data
Restart the node and that should do it correct?
Adaryl "Bob" Wakefield, MBA
Principal
Mass Street Analytics, LLC
913.938.6685
www.linkedin.com/in/bobwakefieldmba
Twitter: @BobLovesData
From: Naganarasimha G R (Naga)
Sent: Wednesday, November 04, 2015 3:59 PM
To: user@hadoop.apache.org
Subject: RE: hadoop not using whole disk for HDFS
Hi Bob,
Seems like you have configured to disk dir to be other than an folder in /home, if so try creating another folder and add to "dfs.datanode.data.dir" seperated by comma instead of trying to reset the default.
And its also advised not to use the root partition "/" to be configured for HDFS data dir, if the Dir usage hits the maximum then OS might fail to function properly.
Regards,
+ Naga
--------------------------------------------------------------------------------
From: P lva [ruvikal@gmail.com]
Sent: Thursday, November 05, 2015 03:11
To: user@hadoop.apache.org
Subject: Re: hadoop not using whole disk for HDFS
What does your dfs.datanode.data.dir point to ?
On Wed, Nov 4, 2015 at 4:14 PM, Adaryl "Bob" Wakefield, MBA <ad...@hotmail.com> wrote:
Filesystem Size Used Avail Use% Mounted on
/dev/mapper/centos-root 50G 12G 39G 23% /
devtmpfs 16G 0 16G 0% /dev
tmpfs 16G 0 16G 0% /dev/shm
tmpfs 16G 1.4G 15G 9% /run
tmpfs 16G 0 16G 0% /sys/fs/cgroup
/dev/sda2 494M 123M 372M 25% /boot
/dev/mapper/centos-home 2.7T 33M 2.7T 1% /home
That’s from one datanode. The second one is nearly identical. I discovered that 50GB is actually a default. That seems really weird. Disk space is cheap. Why would you not just use most of the disk and why is it so hard to reset the default?
Adaryl "Bob" Wakefield, MBA
Principal
Mass Street Analytics, LLC
913.938.6685
www.linkedin.com/in/bobwakefieldmba
Twitter: @BobLovesData
From: Chris Nauroth
Sent: Wednesday, November 04, 2015 12:16 PM
To: user@hadoop.apache.org
Subject: Re: hadoop not using whole disk for HDFS
How are those drives partitioned? Is it possible that the directories pointed to by the dfs.datanode.data.dir property in hdfs-site.xml reside on partitions that are sized to only 100 GB? Running commands like df would be a good way to check this at the OS level, independently of Hadoop.
--Chris Nauroth
From: MBA <ad...@hotmail.com>
Reply-To: "user@hadoop.apache.org" <us...@hadoop.apache.org>
Date: Tuesday, November 3, 2015 at 11:16 AM
To: "user@hadoop.apache.org" <us...@hadoop.apache.org>
Subject: Re: hadoop not using whole disk for HDFS
Yeah. It has the current value of 1073741824 which is like 1.07 gig.
B.
From: Chris Nauroth
Sent: Tuesday, November 03, 2015 11:57 AM
To: user@hadoop.apache.org
Subject: Re: hadoop not using whole disk for HDFS
Hi Bob,
Does the hdfs-site.xml configuration file contain the property dfs.datanode.du.reserved? If this is defined, then the DataNode intentionally will not use this space for storage of replicas.
<property>
<name>dfs.datanode.du.reserved</name>
<value>0</value>
<description>Reserved space in bytes per volume. Always leave this much space free for non dfs use.
</description>
</property>
--Chris Nauroth
From: MBA <ad...@hotmail.com>
Reply-To: "user@hadoop.apache.org" <us...@hadoop.apache.org>
Date: Tuesday, November 3, 2015 at 10:51 AM
To: "user@hadoop.apache.org" <us...@hadoop.apache.org>
Subject: hadoop not using whole disk for HDFS
I’ve got the Hortonworks distro running on a three node cluster. For some reason the disk available for HDFS is MUCH less than the total disk space. Both of my data nodes have 3TB hard drives. Only 100GB of that is being used for HDFS. Is it possible that I have a setting wrong somewhere?
B.
Re: hadoop not using whole disk for HDFS
Posted by "Adaryl \"Bob\" Wakefield, MBA" <ad...@hotmail.com>.
So when you say remount, what exactly am I remounting? /dev/mapper/centos-home?
Adaryl "Bob" Wakefield, MBA
Principal
Mass Street Analytics, LLC
913.938.6685
www.linkedin.com/in/bobwakefieldmba
Twitter: @BobLovesData
From: Naganarasimha G R (Naga)
Sent: Thursday, November 05, 2015 10:04 PM
To: user@hadoop.apache.org
Subject: RE: hadoop not using whole disk for HDFS
Thanks Brahma, dint realize he might have configured both directories and i was assuming bob has configured single new directory "/hdfs/data".
So virtually its showing additional space,
manually try to add a data dir in /home, for your usecase, and restart datanodes.
Not sure about the impacs in Ambari but worth a try! , more permanent solution would be better remount
Filesystem Size Used Avail Use% Mounted on
/dev/mapper/centos-home 2.7T 33M 2.7T 1% /home
--------------------------------------------------------------------------------
From: Brahma Reddy Battula [brahmareddy.battula@huawei.com]
Sent: Friday, November 06, 2015 08:19
To: user@hadoop.apache.org
Subject: RE: hadoop not using whole disk for HDFS
For each configured dfs.datanode.data.dir , HDFS thinks its in separate partiotion and counts the capacity separately. So when another dir is added /hdfs/data, HDFS thinks new partition is added, So it increased the capacity 50GB per node. i.e. 100GB for 2 Nodes.
Not allowing /home directory to configure for data.dir might be ambari's constraint, instead you can manually try to add a data dir in /home, for your usecase, and restart datanodes.
Thanks & Regards
Brahma Reddy Battula
--------------------------------------------------------------------------------
From: Naganarasimha G R (Naga) [garlanaganarasimha@huawei.com]
Sent: Friday, November 06, 2015 7:20 AM
To: user@hadoop.apache.org
Subject: RE: hadoop not using whole disk for HDFS
Hi Bob,
1. I wasn’t able to set the config to /home/hdfs/data. I got an error that told me I’m not allowed to set that config to the /home directory. So I made it /hdfs/data.
Naga : I am not sure about the HDP Distro but if you make it point to /hdfs/data, still it will be pointing to the root mount itself i.e.
/dev/mapper/centos-root 50G 12G 39G 23% /
Other Alternative is to mount the drive to some other folder other than /home and then try.
2. When I restarted, the space available increased by a whopping 100GB.
Naga : I am particularly not sure how this happened may be you can again recheck if you enter the command "df -h <path of the NM data dir configured>" you will find out how much disk space is available on the related mount for which the path is configured.
Regards,
+ Naga
--------------------------------------------------------------------------------
From: Adaryl "Bob" Wakefield, MBA [adaryl.wakefield@hotmail.com]
Sent: Friday, November 06, 2015 06:54
To: user@hadoop.apache.org
Subject: Re: hadoop not using whole disk for HDFS
Is there a maximum amount of disk space that HDFS will use? Is 100GB that max? When we’re supposed to be dealing with “big data” why is the amount of data to be held on any one box such a small number when you’ve got terabytes available?
Adaryl "Bob" Wakefield, MBA
Principal
Mass Street Analytics, LLC
913.938.6685
www.linkedin.com/in/bobwakefieldmba
Twitter: @BobLovesData
From: Adaryl "Bob" Wakefield, MBA
Sent: Wednesday, November 04, 2015 4:38 PM
To: user@hadoop.apache.org
Subject: Re: hadoop not using whole disk for HDFS
This is an experimental cluster and there isn’t anything I can’t lose. I ran into some issues. I’m running the Hortonworks distro and am managing things through Ambari.
1. I wasn’t able to set the config to /home/hdfs/data. I got an error that told me I’m not allowed to set that config to the /home directory. So I made it /hdfs/data.
2. When I restarted, the space available increased by a whopping 100GB.
Adaryl "Bob" Wakefield, MBA
Principal
Mass Street Analytics, LLC
913.938.6685
www.linkedin.com/in/bobwakefieldmba
Twitter: @BobLovesData
From: Naganarasimha G R (Naga)
Sent: Wednesday, November 04, 2015 4:26 PM
To: user@hadoop.apache.org
Subject: RE: hadoop not using whole disk for HDFS
Better would be to stop the daemons and copy the data from /hadoop/hdfs/data to /home/hdfs/data , reconfigure dfs.datanode.data.dir to /home/hdfs/data and then start the daemons. If the data is comparitively less !
Ensure you have the backup if have any critical data !
Regards,
+ Naga
--------------------------------------------------------------------------------
From: Adaryl "Bob" Wakefield, MBA [adaryl.wakefield@hotmail.com]
Sent: Thursday, November 05, 2015 03:40
To: user@hadoop.apache.org
Subject: Re: hadoop not using whole disk for HDFS
So like I can just create a new folder in the home directory like:
home/hdfs/data
and then set dfs.datanode.data.dir to:
/hadoop/hdfs/data,home/hdfs/data
Restart the node and that should do it correct?
Adaryl "Bob" Wakefield, MBA
Principal
Mass Street Analytics, LLC
913.938.6685
www.linkedin.com/in/bobwakefieldmba
Twitter: @BobLovesData
From: Naganarasimha G R (Naga)
Sent: Wednesday, November 04, 2015 3:59 PM
To: user@hadoop.apache.org
Subject: RE: hadoop not using whole disk for HDFS
Hi Bob,
Seems like you have configured to disk dir to be other than an folder in /home, if so try creating another folder and add to "dfs.datanode.data.dir" seperated by comma instead of trying to reset the default.
And its also advised not to use the root partition "/" to be configured for HDFS data dir, if the Dir usage hits the maximum then OS might fail to function properly.
Regards,
+ Naga
--------------------------------------------------------------------------------
From: P lva [ruvikal@gmail.com]
Sent: Thursday, November 05, 2015 03:11
To: user@hadoop.apache.org
Subject: Re: hadoop not using whole disk for HDFS
What does your dfs.datanode.data.dir point to ?
On Wed, Nov 4, 2015 at 4:14 PM, Adaryl "Bob" Wakefield, MBA <ad...@hotmail.com> wrote:
Filesystem Size Used Avail Use% Mounted on
/dev/mapper/centos-root 50G 12G 39G 23% /
devtmpfs 16G 0 16G 0% /dev
tmpfs 16G 0 16G 0% /dev/shm
tmpfs 16G 1.4G 15G 9% /run
tmpfs 16G 0 16G 0% /sys/fs/cgroup
/dev/sda2 494M 123M 372M 25% /boot
/dev/mapper/centos-home 2.7T 33M 2.7T 1% /home
That’s from one datanode. The second one is nearly identical. I discovered that 50GB is actually a default. That seems really weird. Disk space is cheap. Why would you not just use most of the disk and why is it so hard to reset the default?
Adaryl "Bob" Wakefield, MBA
Principal
Mass Street Analytics, LLC
913.938.6685
www.linkedin.com/in/bobwakefieldmba
Twitter: @BobLovesData
From: Chris Nauroth
Sent: Wednesday, November 04, 2015 12:16 PM
To: user@hadoop.apache.org
Subject: Re: hadoop not using whole disk for HDFS
How are those drives partitioned? Is it possible that the directories pointed to by the dfs.datanode.data.dir property in hdfs-site.xml reside on partitions that are sized to only 100 GB? Running commands like df would be a good way to check this at the OS level, independently of Hadoop.
--Chris Nauroth
From: MBA <ad...@hotmail.com>
Reply-To: "user@hadoop.apache.org" <us...@hadoop.apache.org>
Date: Tuesday, November 3, 2015 at 11:16 AM
To: "user@hadoop.apache.org" <us...@hadoop.apache.org>
Subject: Re: hadoop not using whole disk for HDFS
Yeah. It has the current value of 1073741824 which is like 1.07 gig.
B.
From: Chris Nauroth
Sent: Tuesday, November 03, 2015 11:57 AM
To: user@hadoop.apache.org
Subject: Re: hadoop not using whole disk for HDFS
Hi Bob,
Does the hdfs-site.xml configuration file contain the property dfs.datanode.du.reserved? If this is defined, then the DataNode intentionally will not use this space for storage of replicas.
<property>
<name>dfs.datanode.du.reserved</name>
<value>0</value>
<description>Reserved space in bytes per volume. Always leave this much space free for non dfs use.
</description>
</property>
--Chris Nauroth
From: MBA <ad...@hotmail.com>
Reply-To: "user@hadoop.apache.org" <us...@hadoop.apache.org>
Date: Tuesday, November 3, 2015 at 10:51 AM
To: "user@hadoop.apache.org" <us...@hadoop.apache.org>
Subject: hadoop not using whole disk for HDFS
I’ve got the Hortonworks distro running on a three node cluster. For some reason the disk available for HDFS is MUCH less than the total disk space. Both of my data nodes have 3TB hard drives. Only 100GB of that is being used for HDFS. Is it possible that I have a setting wrong somewhere?
B.
Re: hadoop not using whole disk for HDFS
Posted by Namikaze Minato <ll...@gmail.com>.
I hope you understand that you sent 5 emails to several hundred (thousand?)
people in the world in 15 minutes... Please think before hitting this
"send" button.
In Unix (AND windows) you can mount a drive into a folder. This means just
that the disk is accessible from that folder, it does not increase the
capacity of / to mount a 2 TB drive in /home. Nor does it use any space on
/ to do so.
Just think that / is one drive, which contains everything EXCEPT /home and
is for example 50GB big and /home is another drive which is 2TB big.
What you need is to make your hadoop understand that it should use /home
(to be precise a folder in /home and not the complete partition) as hdfs
storage space. Now I will let the other people in the thread disscuss with
you about the technicalities of setting that parameter in the right config
file, as I don't have the knowledge about this specific matter.
Regards,
LLoyd
On 8 November 2015 at 00:00, Adaryl "Bob" Wakefield, MBA <
adaryl.wakefield@hotmail.com> wrote:
> No it’s flat out saying that that config cannot be set with anything
> starting with /home.
>
> Adaryl "Bob" Wakefield, MBA
> Principal
> Mass Street Analytics, LLC
> 913.938.6685
> www.linkedin.com/in/bobwakefieldmba
> Twitter: @BobLovesData
>
> *From:* Naganarasimha G R (Naga) <ga...@huawei.com>
> *Sent:* Thursday, November 05, 2015 10:58 PM
> *To:* user@hadoop.apache.org
> *Subject:* RE: hadoop not using whole disk for HDFS
>
> Hi Bob,
>
> I am suspecting Ambari would not be allowing to create a folder directly
> under */home*, might be it will allow */home/<user_name>/hdfs*, since
> directories under /home is expected to be users home dir.
>
> Regards,
> + Naga
> ------------------------------
> *From:* Naganarasimha G R (Naga) [garlanaganarasimha@huawei.com]
> *Sent:* Friday, November 06, 2015 09:34
> *To:* user@hadoop.apache.org
> *Subject:* RE: hadoop not using whole disk for HDFS
>
> Thanks Brahma, dint realize he might have configured both directories and
> i was assuming bob has configured single new directory "/hdfs/data".
> So virtually its showing additional space,
> *manually try to add a data dir in /home, for your usecase, and restart
> datanodes.*
> Not sure about the impacs in Ambari but worth a try! , more permanent
> solution would be better remount
> Filesystem Size Used Avail Use% Mounted on /dev/mapper/centos-home 2.7T
> 33M 2.7T 1% /home
> ------------------------------
> *From:* Brahma Reddy Battula [brahmareddy.battula@huawei.com]
> *Sent:* Friday, November 06, 2015 08:19
> *To:* user@hadoop.apache.org
> *Subject:* RE: hadoop not using whole disk for HDFS
>
>
> For each configured *dfs.datanode.data.dir* , HDFS thinks its in separate
> partiotion and counts the capacity separately. So when another dir is added
> /hdfs/data, HDFS thinks new partition is added, So it increased the
> capacity 50GB per node. i.e. 100GB for 2 Nodes.
>
> Not allowing /home directory to configure for data.dir might be ambari's
> constraint, instead you can *manually try to add a data dir* in /home,
> for your usecase, and restart datanodes.
>
>
>
> Thanks & Regards
>
> Brahma Reddy Battula
>
>
>
>
> ------------------------------
> *From:* Naganarasimha G R (Naga) [garlanaganarasimha@huawei.com]
> *Sent:* Friday, November 06, 2015 7:20 AM
> *To:* user@hadoop.apache.org
> *Subject:* RE: hadoop not using whole disk for HDFS
>
> Hi Bob,
>
>
>
> *1. I wasn’t able to set the config to /home/hdfs/data. I got an error
> that told me I’m not allowed to set that config to the /home directory. So
> I made it /hdfs/data.*
>
> *Naga : *I am not sure about the HDP Distro but if you make it point to */hdfs/data,
> *still it will be pointing to the root mount itself i.e.
>
> * /dev/mapper/centos-root* *50G* *12G* *39G* *23%* */*
>
> Other Alternative is to mount the drive to some other folder other than
> /home and then try.
>
>
> *2. When I restarted, the space available increased by a whopping 100GB.*
>
> *Naga : *I am particularly not sure how this happened may be you can
> again recheck if you enter the command *"df -h <path of the NM data dir
> configured>" *you will find out how much disk space is available on the
> related mount for which the path is configured.
>
>
>
> Regards,
>
> + Naga
>
>
>
>
>
>
> ------------------------------
> *From:* Adaryl "Bob" Wakefield, MBA [adaryl.wakefield@hotmail.com]
> *Sent:* Friday, November 06, 2015 06:54
> *To:* user@hadoop.apache.org
> *Subject:* Re: hadoop not using whole disk for HDFS
>
> Is there a maximum amount of disk space that HDFS will use? Is 100GB that
> max? When we’re supposed to be dealing with “big data” why is the amount of
> data to be held on any one box such a small number when you’ve got
> terabytes available?
>
> Adaryl "Bob" Wakefield, MBA
> Principal
> Mass Street Analytics, LLC
> 913.938.6685
> www.linkedin.com/in/bobwakefieldmba
> Twitter: @BobLovesData
>
> *From:* Adaryl "Bob" Wakefield, MBA <ad...@hotmail.com>
> *Sent:* Wednesday, November 04, 2015 4:38 PM
> *To:* user@hadoop.apache.org
> *Subject:* Re: hadoop not using whole disk for HDFS
>
> This is an experimental cluster and there isn’t anything I can’t lose. I
> ran into some issues. I’m running the Hortonworks distro and am managing
> things through Ambari.
>
> 1. I wasn’t able to set the config to /home/hdfs/data. I got an error that
> told me I’m not allowed to set that config to the /home directory. So I
> made it /hdfs/data.
> 2. When I restarted, the space available increased by a whopping 100GB.
>
>
>
> Adaryl "Bob" Wakefield, MBA
> Principal
> Mass Street Analytics, LLC
> 913.938.6685
> www.linkedin.com/in/bobwakefieldmba
> Twitter: @BobLovesData
>
> *From:* Naganarasimha G R (Naga) <ga...@huawei.com>
> *Sent:* Wednesday, November 04, 2015 4:26 PM
> *To:* user@hadoop.apache.org
> *Subject:* RE: hadoop not using whole disk for HDFS
>
>
> Better would be to stop the daemons and copy the data from */hadoop/hdfs/data
> *to */home/hdfs/data *, reconfigure *dfs.datanode.data.dir* to */home/hdfs/data
> *and then start the daemons. If the data is comparitively less !
>
> Ensure you have the backup if have any critical data !
>
>
>
> Regards,
>
> + Naga
> ------------------------------
> *From:* Adaryl "Bob" Wakefield, MBA [adaryl.wakefield@hotmail.com]
> *Sent:* Thursday, November 05, 2015 03:40
> *To:* user@hadoop.apache.org
> *Subject:* Re: hadoop not using whole disk for HDFS
>
> So like I can just create a new folder in the home directory like:
> home/hdfs/data
> and then set dfs.datanode.data.dir to:
> /hadoop/hdfs/data,home/hdfs/data
>
> Restart the node and that should do it correct?
>
> Adaryl "Bob" Wakefield, MBA
> Principal
> Mass Street Analytics, LLC
> 913.938.6685
> www.linkedin.com/in/bobwakefieldmba
> Twitter: @BobLovesData
>
> *From:* Naganarasimha G R (Naga) <ga...@huawei.com>
> *Sent:* Wednesday, November 04, 2015 3:59 PM
> *To:* user@hadoop.apache.org
> *Subject:* RE: hadoop not using whole disk for HDFS
>
>
> Hi Bob,
>
>
>
> Seems like you have configured to disk dir to be other than an folder in*
> /home,* if so try creating another folder and add to
> *"dfs.datanode.data.dir"* seperated by comma instead of trying to reset
> the default.
>
> And its also advised not to use the root partition "/" to be configured
> for HDFS data dir, if the Dir usage hits the maximum then OS might fail to
> function properly.
>
>
>
> Regards,
>
> + Naga
> ------------------------------
> *From:* P lva [ruvikal@gmail.com]
> *Sent:* Thursday, November 05, 2015 03:11
> *To:* user@hadoop.apache.org
> *Subject:* Re: hadoop not using whole disk for HDFS
>
> What does your dfs.datanode.data.dir point to ?
>
>
> On Wed, Nov 4, 2015 at 4:14 PM, Adaryl "Bob" Wakefield, MBA <
> adaryl.wakefield@hotmail.com> wrote:
>
>> Filesystem Size Used Avail Use% Mounted on /dev/mapper/centos-root 50G
>> 12G 39G 23% / devtmpfs 16G 0 16G 0% /dev tmpfs 16G 0 16G 0% /dev/shm
>> tmpfs 16G 1.4G 15G 9% /run tmpfs 16G 0 16G 0% /sys/fs/cgroup /dev/sda2
>> 494M 123M 372M 25% /boot /dev/mapper/centos-home 2.7T 33M 2.7T 1% /home
>>
>> That’s from one datanode. The second one is nearly identical. I
>> discovered that 50GB is actually a default. That seems really weird. Disk
>> space is cheap. Why would you not just use most of the disk and why is it
>> so hard to reset the default?
>>
>> Adaryl "Bob" Wakefield, MBA
>> Principal
>> Mass Street Analytics, LLC
>> 913.938.6685
>> www.linkedin.com/in/bobwakefieldmba
>> Twitter: @BobLovesData
>>
>> *From:* Chris Nauroth <cn...@hortonworks.com>
>> *Sent:* Wednesday, November 04, 2015 12:16 PM
>> *To:* user@hadoop.apache.org
>> *Subject:* Re: hadoop not using whole disk for HDFS
>>
>> How are those drives partitioned? Is it possible that the directories
>> pointed to by the dfs.datanode.data.dir property in hdfs-site.xml reside on
>> partitions that are sized to only 100 GB? Running commands like df would
>> be a good way to check this at the OS level, independently of Hadoop.
>>
>> --Chris Nauroth
>>
>> From: MBA <ad...@hotmail.com>
>> Reply-To: "user@hadoop.apache.org" <us...@hadoop.apache.org>
>> Date: Tuesday, November 3, 2015 at 11:16 AM
>> To: "user@hadoop.apache.org" <us...@hadoop.apache.org>
>> Subject: Re: hadoop not using whole disk for HDFS
>>
>> Yeah. It has the current value of 1073741824 which is like 1.07 gig.
>>
>> B.
>> *From:* Chris Nauroth <cn...@hortonworks.com>
>> *Sent:* Tuesday, November 03, 2015 11:57 AM
>> *To:* user@hadoop.apache.org
>> *Subject:* Re: hadoop not using whole disk for HDFS
>>
>> Hi Bob,
>>
>> Does the hdfs-site.xml configuration file contain the property
>> dfs.datanode.du.reserved? If this is defined, then the DataNode
>> intentionally will not use this space for storage of replicas.
>>
>> <property>
>> <name>dfs.datanode.du.reserved</name>
>> <value>0</value>
>> <description>Reserved space in bytes per volume. Always leave this much
>> space free for non dfs use.
>> </description>
>> </property>
>>
>> --Chris Nauroth
>>
>> From: MBA <ad...@hotmail.com>
>> Reply-To: "user@hadoop.apache.org" <us...@hadoop.apache.org>
>> Date: Tuesday, November 3, 2015 at 10:51 AM
>> To: "user@hadoop.apache.org" <us...@hadoop.apache.org>
>> Subject: hadoop not using whole disk for HDFS
>>
>> I’ve got the Hortonworks distro running on a three node cluster. For some
>> reason the disk available for HDFS is MUCH less than the total disk space.
>> Both of my data nodes have 3TB hard drives. Only 100GB of that is being
>> used for HDFS. Is it possible that I have a setting wrong somewhere?
>>
>> B.
>>
>
>
Re: hadoop not using whole disk for HDFS
Posted by Namikaze Minato <ll...@gmail.com>.
I hope you understand that you sent 5 emails to several hundred (thousand?)
people in the world in 15 minutes... Please think before hitting this
"send" button.
In Unix (AND windows) you can mount a drive into a folder. This means just
that the disk is accessible from that folder, it does not increase the
capacity of / to mount a 2 TB drive in /home. Nor does it use any space on
/ to do so.
Just think that / is one drive, which contains everything EXCEPT /home and
is for example 50GB big and /home is another drive which is 2TB big.
What you need is to make your hadoop understand that it should use /home
(to be precise a folder in /home and not the complete partition) as hdfs
storage space. Now I will let the other people in the thread disscuss with
you about the technicalities of setting that parameter in the right config
file, as I don't have the knowledge about this specific matter.
Regards,
LLoyd
On 8 November 2015 at 00:00, Adaryl "Bob" Wakefield, MBA <
adaryl.wakefield@hotmail.com> wrote:
> No it’s flat out saying that that config cannot be set with anything
> starting with /home.
>
> Adaryl "Bob" Wakefield, MBA
> Principal
> Mass Street Analytics, LLC
> 913.938.6685
> www.linkedin.com/in/bobwakefieldmba
> Twitter: @BobLovesData
>
> *From:* Naganarasimha G R (Naga) <ga...@huawei.com>
> *Sent:* Thursday, November 05, 2015 10:58 PM
> *To:* user@hadoop.apache.org
> *Subject:* RE: hadoop not using whole disk for HDFS
>
> Hi Bob,
>
> I am suspecting Ambari would not be allowing to create a folder directly
> under */home*, might be it will allow */home/<user_name>/hdfs*, since
> directories under /home is expected to be users home dir.
>
> Regards,
> + Naga
> ------------------------------
> *From:* Naganarasimha G R (Naga) [garlanaganarasimha@huawei.com]
> *Sent:* Friday, November 06, 2015 09:34
> *To:* user@hadoop.apache.org
> *Subject:* RE: hadoop not using whole disk for HDFS
>
> Thanks Brahma, dint realize he might have configured both directories and
> i was assuming bob has configured single new directory "/hdfs/data".
> So virtually its showing additional space,
> *manually try to add a data dir in /home, for your usecase, and restart
> datanodes.*
> Not sure about the impacs in Ambari but worth a try! , more permanent
> solution would be better remount
> Filesystem Size Used Avail Use% Mounted on /dev/mapper/centos-home 2.7T
> 33M 2.7T 1% /home
> ------------------------------
> *From:* Brahma Reddy Battula [brahmareddy.battula@huawei.com]
> *Sent:* Friday, November 06, 2015 08:19
> *To:* user@hadoop.apache.org
> *Subject:* RE: hadoop not using whole disk for HDFS
>
>
> For each configured *dfs.datanode.data.dir* , HDFS thinks its in separate
> partiotion and counts the capacity separately. So when another dir is added
> /hdfs/data, HDFS thinks new partition is added, So it increased the
> capacity 50GB per node. i.e. 100GB for 2 Nodes.
>
> Not allowing /home directory to configure for data.dir might be ambari's
> constraint, instead you can *manually try to add a data dir* in /home,
> for your usecase, and restart datanodes.
>
>
>
> Thanks & Regards
>
> Brahma Reddy Battula
>
>
>
>
> ------------------------------
> *From:* Naganarasimha G R (Naga) [garlanaganarasimha@huawei.com]
> *Sent:* Friday, November 06, 2015 7:20 AM
> *To:* user@hadoop.apache.org
> *Subject:* RE: hadoop not using whole disk for HDFS
>
> Hi Bob,
>
>
>
> *1. I wasn’t able to set the config to /home/hdfs/data. I got an error
> that told me I’m not allowed to set that config to the /home directory. So
> I made it /hdfs/data.*
>
> *Naga : *I am not sure about the HDP Distro but if you make it point to */hdfs/data,
> *still it will be pointing to the root mount itself i.e.
>
> * /dev/mapper/centos-root* *50G* *12G* *39G* *23%* */*
>
> Other Alternative is to mount the drive to some other folder other than
> /home and then try.
>
>
> *2. When I restarted, the space available increased by a whopping 100GB.*
>
> *Naga : *I am particularly not sure how this happened may be you can
> again recheck if you enter the command *"df -h <path of the NM data dir
> configured>" *you will find out how much disk space is available on the
> related mount for which the path is configured.
>
>
>
> Regards,
>
> + Naga
>
>
>
>
>
>
> ------------------------------
> *From:* Adaryl "Bob" Wakefield, MBA [adaryl.wakefield@hotmail.com]
> *Sent:* Friday, November 06, 2015 06:54
> *To:* user@hadoop.apache.org
> *Subject:* Re: hadoop not using whole disk for HDFS
>
> Is there a maximum amount of disk space that HDFS will use? Is 100GB that
> max? When we’re supposed to be dealing with “big data” why is the amount of
> data to be held on any one box such a small number when you’ve got
> terabytes available?
>
> Adaryl "Bob" Wakefield, MBA
> Principal
> Mass Street Analytics, LLC
> 913.938.6685
> www.linkedin.com/in/bobwakefieldmba
> Twitter: @BobLovesData
>
> *From:* Adaryl "Bob" Wakefield, MBA <ad...@hotmail.com>
> *Sent:* Wednesday, November 04, 2015 4:38 PM
> *To:* user@hadoop.apache.org
> *Subject:* Re: hadoop not using whole disk for HDFS
>
> This is an experimental cluster and there isn’t anything I can’t lose. I
> ran into some issues. I’m running the Hortonworks distro and am managing
> things through Ambari.
>
> 1. I wasn’t able to set the config to /home/hdfs/data. I got an error that
> told me I’m not allowed to set that config to the /home directory. So I
> made it /hdfs/data.
> 2. When I restarted, the space available increased by a whopping 100GB.
>
>
>
> Adaryl "Bob" Wakefield, MBA
> Principal
> Mass Street Analytics, LLC
> 913.938.6685
> www.linkedin.com/in/bobwakefieldmba
> Twitter: @BobLovesData
>
> *From:* Naganarasimha G R (Naga) <ga...@huawei.com>
> *Sent:* Wednesday, November 04, 2015 4:26 PM
> *To:* user@hadoop.apache.org
> *Subject:* RE: hadoop not using whole disk for HDFS
>
>
> Better would be to stop the daemons and copy the data from */hadoop/hdfs/data
> *to */home/hdfs/data *, reconfigure *dfs.datanode.data.dir* to */home/hdfs/data
> *and then start the daemons. If the data is comparitively less !
>
> Ensure you have the backup if have any critical data !
>
>
>
> Regards,
>
> + Naga
> ------------------------------
> *From:* Adaryl "Bob" Wakefield, MBA [adaryl.wakefield@hotmail.com]
> *Sent:* Thursday, November 05, 2015 03:40
> *To:* user@hadoop.apache.org
> *Subject:* Re: hadoop not using whole disk for HDFS
>
> So like I can just create a new folder in the home directory like:
> home/hdfs/data
> and then set dfs.datanode.data.dir to:
> /hadoop/hdfs/data,home/hdfs/data
>
> Restart the node and that should do it correct?
>
> Adaryl "Bob" Wakefield, MBA
> Principal
> Mass Street Analytics, LLC
> 913.938.6685
> www.linkedin.com/in/bobwakefieldmba
> Twitter: @BobLovesData
>
> *From:* Naganarasimha G R (Naga) <ga...@huawei.com>
> *Sent:* Wednesday, November 04, 2015 3:59 PM
> *To:* user@hadoop.apache.org
> *Subject:* RE: hadoop not using whole disk for HDFS
>
>
> Hi Bob,
>
>
>
> Seems like you have configured to disk dir to be other than an folder in*
> /home,* if so try creating another folder and add to
> *"dfs.datanode.data.dir"* seperated by comma instead of trying to reset
> the default.
>
> And its also advised not to use the root partition "/" to be configured
> for HDFS data dir, if the Dir usage hits the maximum then OS might fail to
> function properly.
>
>
>
> Regards,
>
> + Naga
> ------------------------------
> *From:* P lva [ruvikal@gmail.com]
> *Sent:* Thursday, November 05, 2015 03:11
> *To:* user@hadoop.apache.org
> *Subject:* Re: hadoop not using whole disk for HDFS
>
> What does your dfs.datanode.data.dir point to ?
>
>
> On Wed, Nov 4, 2015 at 4:14 PM, Adaryl "Bob" Wakefield, MBA <
> adaryl.wakefield@hotmail.com> wrote:
>
>> Filesystem Size Used Avail Use% Mounted on /dev/mapper/centos-root 50G
>> 12G 39G 23% / devtmpfs 16G 0 16G 0% /dev tmpfs 16G 0 16G 0% /dev/shm
>> tmpfs 16G 1.4G 15G 9% /run tmpfs 16G 0 16G 0% /sys/fs/cgroup /dev/sda2
>> 494M 123M 372M 25% /boot /dev/mapper/centos-home 2.7T 33M 2.7T 1% /home
>>
>> That’s from one datanode. The second one is nearly identical. I
>> discovered that 50GB is actually a default. That seems really weird. Disk
>> space is cheap. Why would you not just use most of the disk and why is it
>> so hard to reset the default?
>>
>> Adaryl "Bob" Wakefield, MBA
>> Principal
>> Mass Street Analytics, LLC
>> 913.938.6685
>> www.linkedin.com/in/bobwakefieldmba
>> Twitter: @BobLovesData
>>
>> *From:* Chris Nauroth <cn...@hortonworks.com>
>> *Sent:* Wednesday, November 04, 2015 12:16 PM
>> *To:* user@hadoop.apache.org
>> *Subject:* Re: hadoop not using whole disk for HDFS
>>
>> How are those drives partitioned? Is it possible that the directories
>> pointed to by the dfs.datanode.data.dir property in hdfs-site.xml reside on
>> partitions that are sized to only 100 GB? Running commands like df would
>> be a good way to check this at the OS level, independently of Hadoop.
>>
>> --Chris Nauroth
>>
>> From: MBA <ad...@hotmail.com>
>> Reply-To: "user@hadoop.apache.org" <us...@hadoop.apache.org>
>> Date: Tuesday, November 3, 2015 at 11:16 AM
>> To: "user@hadoop.apache.org" <us...@hadoop.apache.org>
>> Subject: Re: hadoop not using whole disk for HDFS
>>
>> Yeah. It has the current value of 1073741824 which is like 1.07 gig.
>>
>> B.
>> *From:* Chris Nauroth <cn...@hortonworks.com>
>> *Sent:* Tuesday, November 03, 2015 11:57 AM
>> *To:* user@hadoop.apache.org
>> *Subject:* Re: hadoop not using whole disk for HDFS
>>
>> Hi Bob,
>>
>> Does the hdfs-site.xml configuration file contain the property
>> dfs.datanode.du.reserved? If this is defined, then the DataNode
>> intentionally will not use this space for storage of replicas.
>>
>> <property>
>> <name>dfs.datanode.du.reserved</name>
>> <value>0</value>
>> <description>Reserved space in bytes per volume. Always leave this much
>> space free for non dfs use.
>> </description>
>> </property>
>>
>> --Chris Nauroth
>>
>> From: MBA <ad...@hotmail.com>
>> Reply-To: "user@hadoop.apache.org" <us...@hadoop.apache.org>
>> Date: Tuesday, November 3, 2015 at 10:51 AM
>> To: "user@hadoop.apache.org" <us...@hadoop.apache.org>
>> Subject: hadoop not using whole disk for HDFS
>>
>> I’ve got the Hortonworks distro running on a three node cluster. For some
>> reason the disk available for HDFS is MUCH less than the total disk space.
>> Both of my data nodes have 3TB hard drives. Only 100GB of that is being
>> used for HDFS. Is it possible that I have a setting wrong somewhere?
>>
>> B.
>>
>
>
Re: hadoop not using whole disk for HDFS
Posted by Namikaze Minato <ll...@gmail.com>.
I hope you understand that you sent 5 emails to several hundred (thousand?)
people in the world in 15 minutes... Please think before hitting this
"send" button.
In Unix (AND windows) you can mount a drive into a folder. This means just
that the disk is accessible from that folder, it does not increase the
capacity of / to mount a 2 TB drive in /home. Nor does it use any space on
/ to do so.
Just think that / is one drive, which contains everything EXCEPT /home and
is for example 50GB big and /home is another drive which is 2TB big.
What you need is to make your hadoop understand that it should use /home
(to be precise a folder in /home and not the complete partition) as hdfs
storage space. Now I will let the other people in the thread disscuss with
you about the technicalities of setting that parameter in the right config
file, as I don't have the knowledge about this specific matter.
Regards,
LLoyd
On 8 November 2015 at 00:00, Adaryl "Bob" Wakefield, MBA <
adaryl.wakefield@hotmail.com> wrote:
> No it’s flat out saying that that config cannot be set with anything
> starting with /home.
>
> Adaryl "Bob" Wakefield, MBA
> Principal
> Mass Street Analytics, LLC
> 913.938.6685
> www.linkedin.com/in/bobwakefieldmba
> Twitter: @BobLovesData
>
> *From:* Naganarasimha G R (Naga) <ga...@huawei.com>
> *Sent:* Thursday, November 05, 2015 10:58 PM
> *To:* user@hadoop.apache.org
> *Subject:* RE: hadoop not using whole disk for HDFS
>
> Hi Bob,
>
> I am suspecting Ambari would not be allowing to create a folder directly
> under */home*, might be it will allow */home/<user_name>/hdfs*, since
> directories under /home is expected to be users home dir.
>
> Regards,
> + Naga
> ------------------------------
> *From:* Naganarasimha G R (Naga) [garlanaganarasimha@huawei.com]
> *Sent:* Friday, November 06, 2015 09:34
> *To:* user@hadoop.apache.org
> *Subject:* RE: hadoop not using whole disk for HDFS
>
> Thanks Brahma, dint realize he might have configured both directories and
> i was assuming bob has configured single new directory "/hdfs/data".
> So virtually its showing additional space,
> *manually try to add a data dir in /home, for your usecase, and restart
> datanodes.*
> Not sure about the impacs in Ambari but worth a try! , more permanent
> solution would be better remount
> Filesystem Size Used Avail Use% Mounted on /dev/mapper/centos-home 2.7T
> 33M 2.7T 1% /home
> ------------------------------
> *From:* Brahma Reddy Battula [brahmareddy.battula@huawei.com]
> *Sent:* Friday, November 06, 2015 08:19
> *To:* user@hadoop.apache.org
> *Subject:* RE: hadoop not using whole disk for HDFS
>
>
> For each configured *dfs.datanode.data.dir* , HDFS thinks its in separate
> partiotion and counts the capacity separately. So when another dir is added
> /hdfs/data, HDFS thinks new partition is added, So it increased the
> capacity 50GB per node. i.e. 100GB for 2 Nodes.
>
> Not allowing /home directory to configure for data.dir might be ambari's
> constraint, instead you can *manually try to add a data dir* in /home,
> for your usecase, and restart datanodes.
>
>
>
> Thanks & Regards
>
> Brahma Reddy Battula
>
>
>
>
> ------------------------------
> *From:* Naganarasimha G R (Naga) [garlanaganarasimha@huawei.com]
> *Sent:* Friday, November 06, 2015 7:20 AM
> *To:* user@hadoop.apache.org
> *Subject:* RE: hadoop not using whole disk for HDFS
>
> Hi Bob,
>
>
>
> *1. I wasn’t able to set the config to /home/hdfs/data. I got an error
> that told me I’m not allowed to set that config to the /home directory. So
> I made it /hdfs/data.*
>
> *Naga : *I am not sure about the HDP Distro but if you make it point to */hdfs/data,
> *still it will be pointing to the root mount itself i.e.
>
> * /dev/mapper/centos-root* *50G* *12G* *39G* *23%* */*
>
> Other Alternative is to mount the drive to some other folder other than
> /home and then try.
>
>
> *2. When I restarted, the space available increased by a whopping 100GB.*
>
> *Naga : *I am particularly not sure how this happened may be you can
> again recheck if you enter the command *"df -h <path of the NM data dir
> configured>" *you will find out how much disk space is available on the
> related mount for which the path is configured.
>
>
>
> Regards,
>
> + Naga
>
>
>
>
>
>
> ------------------------------
> *From:* Adaryl "Bob" Wakefield, MBA [adaryl.wakefield@hotmail.com]
> *Sent:* Friday, November 06, 2015 06:54
> *To:* user@hadoop.apache.org
> *Subject:* Re: hadoop not using whole disk for HDFS
>
> Is there a maximum amount of disk space that HDFS will use? Is 100GB that
> max? When we’re supposed to be dealing with “big data” why is the amount of
> data to be held on any one box such a small number when you’ve got
> terabytes available?
>
> Adaryl "Bob" Wakefield, MBA
> Principal
> Mass Street Analytics, LLC
> 913.938.6685
> www.linkedin.com/in/bobwakefieldmba
> Twitter: @BobLovesData
>
> *From:* Adaryl "Bob" Wakefield, MBA <ad...@hotmail.com>
> *Sent:* Wednesday, November 04, 2015 4:38 PM
> *To:* user@hadoop.apache.org
> *Subject:* Re: hadoop not using whole disk for HDFS
>
> This is an experimental cluster and there isn’t anything I can’t lose. I
> ran into some issues. I’m running the Hortonworks distro and am managing
> things through Ambari.
>
> 1. I wasn’t able to set the config to /home/hdfs/data. I got an error that
> told me I’m not allowed to set that config to the /home directory. So I
> made it /hdfs/data.
> 2. When I restarted, the space available increased by a whopping 100GB.
>
>
>
> Adaryl "Bob" Wakefield, MBA
> Principal
> Mass Street Analytics, LLC
> 913.938.6685
> www.linkedin.com/in/bobwakefieldmba
> Twitter: @BobLovesData
>
> *From:* Naganarasimha G R (Naga) <ga...@huawei.com>
> *Sent:* Wednesday, November 04, 2015 4:26 PM
> *To:* user@hadoop.apache.org
> *Subject:* RE: hadoop not using whole disk for HDFS
>
>
> Better would be to stop the daemons and copy the data from */hadoop/hdfs/data
> *to */home/hdfs/data *, reconfigure *dfs.datanode.data.dir* to */home/hdfs/data
> *and then start the daemons. If the data is comparitively less !
>
> Ensure you have the backup if have any critical data !
>
>
>
> Regards,
>
> + Naga
> ------------------------------
> *From:* Adaryl "Bob" Wakefield, MBA [adaryl.wakefield@hotmail.com]
> *Sent:* Thursday, November 05, 2015 03:40
> *To:* user@hadoop.apache.org
> *Subject:* Re: hadoop not using whole disk for HDFS
>
> So like I can just create a new folder in the home directory like:
> home/hdfs/data
> and then set dfs.datanode.data.dir to:
> /hadoop/hdfs/data,home/hdfs/data
>
> Restart the node and that should do it correct?
>
> Adaryl "Bob" Wakefield, MBA
> Principal
> Mass Street Analytics, LLC
> 913.938.6685
> www.linkedin.com/in/bobwakefieldmba
> Twitter: @BobLovesData
>
> *From:* Naganarasimha G R (Naga) <ga...@huawei.com>
> *Sent:* Wednesday, November 04, 2015 3:59 PM
> *To:* user@hadoop.apache.org
> *Subject:* RE: hadoop not using whole disk for HDFS
>
>
> Hi Bob,
>
>
>
> Seems like you have configured to disk dir to be other than an folder in*
> /home,* if so try creating another folder and add to
> *"dfs.datanode.data.dir"* seperated by comma instead of trying to reset
> the default.
>
> And its also advised not to use the root partition "/" to be configured
> for HDFS data dir, if the Dir usage hits the maximum then OS might fail to
> function properly.
>
>
>
> Regards,
>
> + Naga
> ------------------------------
> *From:* P lva [ruvikal@gmail.com]
> *Sent:* Thursday, November 05, 2015 03:11
> *To:* user@hadoop.apache.org
> *Subject:* Re: hadoop not using whole disk for HDFS
>
> What does your dfs.datanode.data.dir point to ?
>
>
> On Wed, Nov 4, 2015 at 4:14 PM, Adaryl "Bob" Wakefield, MBA <
> adaryl.wakefield@hotmail.com> wrote:
>
>> Filesystem Size Used Avail Use% Mounted on /dev/mapper/centos-root 50G
>> 12G 39G 23% / devtmpfs 16G 0 16G 0% /dev tmpfs 16G 0 16G 0% /dev/shm
>> tmpfs 16G 1.4G 15G 9% /run tmpfs 16G 0 16G 0% /sys/fs/cgroup /dev/sda2
>> 494M 123M 372M 25% /boot /dev/mapper/centos-home 2.7T 33M 2.7T 1% /home
>>
>> That’s from one datanode. The second one is nearly identical. I
>> discovered that 50GB is actually a default. That seems really weird. Disk
>> space is cheap. Why would you not just use most of the disk and why is it
>> so hard to reset the default?
>>
>> Adaryl "Bob" Wakefield, MBA
>> Principal
>> Mass Street Analytics, LLC
>> 913.938.6685
>> www.linkedin.com/in/bobwakefieldmba
>> Twitter: @BobLovesData
>>
>> *From:* Chris Nauroth <cn...@hortonworks.com>
>> *Sent:* Wednesday, November 04, 2015 12:16 PM
>> *To:* user@hadoop.apache.org
>> *Subject:* Re: hadoop not using whole disk for HDFS
>>
>> How are those drives partitioned? Is it possible that the directories
>> pointed to by the dfs.datanode.data.dir property in hdfs-site.xml reside on
>> partitions that are sized to only 100 GB? Running commands like df would
>> be a good way to check this at the OS level, independently of Hadoop.
>>
>> --Chris Nauroth
>>
>> From: MBA <ad...@hotmail.com>
>> Reply-To: "user@hadoop.apache.org" <us...@hadoop.apache.org>
>> Date: Tuesday, November 3, 2015 at 11:16 AM
>> To: "user@hadoop.apache.org" <us...@hadoop.apache.org>
>> Subject: Re: hadoop not using whole disk for HDFS
>>
>> Yeah. It has the current value of 1073741824 which is like 1.07 gig.
>>
>> B.
>> *From:* Chris Nauroth <cn...@hortonworks.com>
>> *Sent:* Tuesday, November 03, 2015 11:57 AM
>> *To:* user@hadoop.apache.org
>> *Subject:* Re: hadoop not using whole disk for HDFS
>>
>> Hi Bob,
>>
>> Does the hdfs-site.xml configuration file contain the property
>> dfs.datanode.du.reserved? If this is defined, then the DataNode
>> intentionally will not use this space for storage of replicas.
>>
>> <property>
>> <name>dfs.datanode.du.reserved</name>
>> <value>0</value>
>> <description>Reserved space in bytes per volume. Always leave this much
>> space free for non dfs use.
>> </description>
>> </property>
>>
>> --Chris Nauroth
>>
>> From: MBA <ad...@hotmail.com>
>> Reply-To: "user@hadoop.apache.org" <us...@hadoop.apache.org>
>> Date: Tuesday, November 3, 2015 at 10:51 AM
>> To: "user@hadoop.apache.org" <us...@hadoop.apache.org>
>> Subject: hadoop not using whole disk for HDFS
>>
>> I’ve got the Hortonworks distro running on a three node cluster. For some
>> reason the disk available for HDFS is MUCH less than the total disk space.
>> Both of my data nodes have 3TB hard drives. Only 100GB of that is being
>> used for HDFS. Is it possible that I have a setting wrong somewhere?
>>
>> B.
>>
>
>
Re: hadoop not using whole disk for HDFS
Posted by Namikaze Minato <ll...@gmail.com>.
I hope you understand that you sent 5 emails to several hundred (thousand?)
people in the world in 15 minutes... Please think before hitting this
"send" button.
In Unix (AND windows) you can mount a drive into a folder. This means just
that the disk is accessible from that folder, it does not increase the
capacity of / to mount a 2 TB drive in /home. Nor does it use any space on
/ to do so.
Just think that / is one drive, which contains everything EXCEPT /home and
is for example 50GB big and /home is another drive which is 2TB big.
What you need is to make your hadoop understand that it should use /home
(to be precise a folder in /home and not the complete partition) as hdfs
storage space. Now I will let the other people in the thread disscuss with
you about the technicalities of setting that parameter in the right config
file, as I don't have the knowledge about this specific matter.
Regards,
LLoyd
On 8 November 2015 at 00:00, Adaryl "Bob" Wakefield, MBA <
adaryl.wakefield@hotmail.com> wrote:
> No it’s flat out saying that that config cannot be set with anything
> starting with /home.
>
> Adaryl "Bob" Wakefield, MBA
> Principal
> Mass Street Analytics, LLC
> 913.938.6685
> www.linkedin.com/in/bobwakefieldmba
> Twitter: @BobLovesData
>
> *From:* Naganarasimha G R (Naga) <ga...@huawei.com>
> *Sent:* Thursday, November 05, 2015 10:58 PM
> *To:* user@hadoop.apache.org
> *Subject:* RE: hadoop not using whole disk for HDFS
>
> Hi Bob,
>
> I am suspecting Ambari would not be allowing to create a folder directly
> under */home*, might be it will allow */home/<user_name>/hdfs*, since
> directories under /home is expected to be users home dir.
>
> Regards,
> + Naga
> ------------------------------
> *From:* Naganarasimha G R (Naga) [garlanaganarasimha@huawei.com]
> *Sent:* Friday, November 06, 2015 09:34
> *To:* user@hadoop.apache.org
> *Subject:* RE: hadoop not using whole disk for HDFS
>
> Thanks Brahma, dint realize he might have configured both directories and
> i was assuming bob has configured single new directory "/hdfs/data".
> So virtually its showing additional space,
> *manually try to add a data dir in /home, for your usecase, and restart
> datanodes.*
> Not sure about the impacs in Ambari but worth a try! , more permanent
> solution would be better remount
> Filesystem Size Used Avail Use% Mounted on /dev/mapper/centos-home 2.7T
> 33M 2.7T 1% /home
> ------------------------------
> *From:* Brahma Reddy Battula [brahmareddy.battula@huawei.com]
> *Sent:* Friday, November 06, 2015 08:19
> *To:* user@hadoop.apache.org
> *Subject:* RE: hadoop not using whole disk for HDFS
>
>
> For each configured *dfs.datanode.data.dir* , HDFS thinks its in separate
> partiotion and counts the capacity separately. So when another dir is added
> /hdfs/data, HDFS thinks new partition is added, So it increased the
> capacity 50GB per node. i.e. 100GB for 2 Nodes.
>
> Not allowing /home directory to configure for data.dir might be ambari's
> constraint, instead you can *manually try to add a data dir* in /home,
> for your usecase, and restart datanodes.
>
>
>
> Thanks & Regards
>
> Brahma Reddy Battula
>
>
>
>
> ------------------------------
> *From:* Naganarasimha G R (Naga) [garlanaganarasimha@huawei.com]
> *Sent:* Friday, November 06, 2015 7:20 AM
> *To:* user@hadoop.apache.org
> *Subject:* RE: hadoop not using whole disk for HDFS
>
> Hi Bob,
>
>
>
> *1. I wasn’t able to set the config to /home/hdfs/data. I got an error
> that told me I’m not allowed to set that config to the /home directory. So
> I made it /hdfs/data.*
>
> *Naga : *I am not sure about the HDP Distro but if you make it point to */hdfs/data,
> *still it will be pointing to the root mount itself i.e.
>
> * /dev/mapper/centos-root* *50G* *12G* *39G* *23%* */*
>
> Other Alternative is to mount the drive to some other folder other than
> /home and then try.
>
>
> *2. When I restarted, the space available increased by a whopping 100GB.*
>
> *Naga : *I am particularly not sure how this happened may be you can
> again recheck if you enter the command *"df -h <path of the NM data dir
> configured>" *you will find out how much disk space is available on the
> related mount for which the path is configured.
>
>
>
> Regards,
>
> + Naga
>
>
>
>
>
>
> ------------------------------
> *From:* Adaryl "Bob" Wakefield, MBA [adaryl.wakefield@hotmail.com]
> *Sent:* Friday, November 06, 2015 06:54
> *To:* user@hadoop.apache.org
> *Subject:* Re: hadoop not using whole disk for HDFS
>
> Is there a maximum amount of disk space that HDFS will use? Is 100GB that
> max? When we’re supposed to be dealing with “big data” why is the amount of
> data to be held on any one box such a small number when you’ve got
> terabytes available?
>
> Adaryl "Bob" Wakefield, MBA
> Principal
> Mass Street Analytics, LLC
> 913.938.6685
> www.linkedin.com/in/bobwakefieldmba
> Twitter: @BobLovesData
>
> *From:* Adaryl "Bob" Wakefield, MBA <ad...@hotmail.com>
> *Sent:* Wednesday, November 04, 2015 4:38 PM
> *To:* user@hadoop.apache.org
> *Subject:* Re: hadoop not using whole disk for HDFS
>
> This is an experimental cluster and there isn’t anything I can’t lose. I
> ran into some issues. I’m running the Hortonworks distro and am managing
> things through Ambari.
>
> 1. I wasn’t able to set the config to /home/hdfs/data. I got an error that
> told me I’m not allowed to set that config to the /home directory. So I
> made it /hdfs/data.
> 2. When I restarted, the space available increased by a whopping 100GB.
>
>
>
> Adaryl "Bob" Wakefield, MBA
> Principal
> Mass Street Analytics, LLC
> 913.938.6685
> www.linkedin.com/in/bobwakefieldmba
> Twitter: @BobLovesData
>
> *From:* Naganarasimha G R (Naga) <ga...@huawei.com>
> *Sent:* Wednesday, November 04, 2015 4:26 PM
> *To:* user@hadoop.apache.org
> *Subject:* RE: hadoop not using whole disk for HDFS
>
>
> Better would be to stop the daemons and copy the data from */hadoop/hdfs/data
> *to */home/hdfs/data *, reconfigure *dfs.datanode.data.dir* to */home/hdfs/data
> *and then start the daemons. If the data is comparitively less !
>
> Ensure you have the backup if have any critical data !
>
>
>
> Regards,
>
> + Naga
> ------------------------------
> *From:* Adaryl "Bob" Wakefield, MBA [adaryl.wakefield@hotmail.com]
> *Sent:* Thursday, November 05, 2015 03:40
> *To:* user@hadoop.apache.org
> *Subject:* Re: hadoop not using whole disk for HDFS
>
> So like I can just create a new folder in the home directory like:
> home/hdfs/data
> and then set dfs.datanode.data.dir to:
> /hadoop/hdfs/data,home/hdfs/data
>
> Restart the node and that should do it correct?
>
> Adaryl "Bob" Wakefield, MBA
> Principal
> Mass Street Analytics, LLC
> 913.938.6685
> www.linkedin.com/in/bobwakefieldmba
> Twitter: @BobLovesData
>
> *From:* Naganarasimha G R (Naga) <ga...@huawei.com>
> *Sent:* Wednesday, November 04, 2015 3:59 PM
> *To:* user@hadoop.apache.org
> *Subject:* RE: hadoop not using whole disk for HDFS
>
>
> Hi Bob,
>
>
>
> Seems like you have configured to disk dir to be other than an folder in*
> /home,* if so try creating another folder and add to
> *"dfs.datanode.data.dir"* seperated by comma instead of trying to reset
> the default.
>
> And its also advised not to use the root partition "/" to be configured
> for HDFS data dir, if the Dir usage hits the maximum then OS might fail to
> function properly.
>
>
>
> Regards,
>
> + Naga
> ------------------------------
> *From:* P lva [ruvikal@gmail.com]
> *Sent:* Thursday, November 05, 2015 03:11
> *To:* user@hadoop.apache.org
> *Subject:* Re: hadoop not using whole disk for HDFS
>
> What does your dfs.datanode.data.dir point to ?
>
>
> On Wed, Nov 4, 2015 at 4:14 PM, Adaryl "Bob" Wakefield, MBA <
> adaryl.wakefield@hotmail.com> wrote:
>
>> Filesystem Size Used Avail Use% Mounted on /dev/mapper/centos-root 50G
>> 12G 39G 23% / devtmpfs 16G 0 16G 0% /dev tmpfs 16G 0 16G 0% /dev/shm
>> tmpfs 16G 1.4G 15G 9% /run tmpfs 16G 0 16G 0% /sys/fs/cgroup /dev/sda2
>> 494M 123M 372M 25% /boot /dev/mapper/centos-home 2.7T 33M 2.7T 1% /home
>>
>> That’s from one datanode. The second one is nearly identical. I
>> discovered that 50GB is actually a default. That seems really weird. Disk
>> space is cheap. Why would you not just use most of the disk and why is it
>> so hard to reset the default?
>>
>> Adaryl "Bob" Wakefield, MBA
>> Principal
>> Mass Street Analytics, LLC
>> 913.938.6685
>> www.linkedin.com/in/bobwakefieldmba
>> Twitter: @BobLovesData
>>
>> *From:* Chris Nauroth <cn...@hortonworks.com>
>> *Sent:* Wednesday, November 04, 2015 12:16 PM
>> *To:* user@hadoop.apache.org
>> *Subject:* Re: hadoop not using whole disk for HDFS
>>
>> How are those drives partitioned? Is it possible that the directories
>> pointed to by the dfs.datanode.data.dir property in hdfs-site.xml reside on
>> partitions that are sized to only 100 GB? Running commands like df would
>> be a good way to check this at the OS level, independently of Hadoop.
>>
>> --Chris Nauroth
>>
>> From: MBA <ad...@hotmail.com>
>> Reply-To: "user@hadoop.apache.org" <us...@hadoop.apache.org>
>> Date: Tuesday, November 3, 2015 at 11:16 AM
>> To: "user@hadoop.apache.org" <us...@hadoop.apache.org>
>> Subject: Re: hadoop not using whole disk for HDFS
>>
>> Yeah. It has the current value of 1073741824 which is like 1.07 gig.
>>
>> B.
>> *From:* Chris Nauroth <cn...@hortonworks.com>
>> *Sent:* Tuesday, November 03, 2015 11:57 AM
>> *To:* user@hadoop.apache.org
>> *Subject:* Re: hadoop not using whole disk for HDFS
>>
>> Hi Bob,
>>
>> Does the hdfs-site.xml configuration file contain the property
>> dfs.datanode.du.reserved? If this is defined, then the DataNode
>> intentionally will not use this space for storage of replicas.
>>
>> <property>
>> <name>dfs.datanode.du.reserved</name>
>> <value>0</value>
>> <description>Reserved space in bytes per volume. Always leave this much
>> space free for non dfs use.
>> </description>
>> </property>
>>
>> --Chris Nauroth
>>
>> From: MBA <ad...@hotmail.com>
>> Reply-To: "user@hadoop.apache.org" <us...@hadoop.apache.org>
>> Date: Tuesday, November 3, 2015 at 10:51 AM
>> To: "user@hadoop.apache.org" <us...@hadoop.apache.org>
>> Subject: hadoop not using whole disk for HDFS
>>
>> I’ve got the Hortonworks distro running on a three node cluster. For some
>> reason the disk available for HDFS is MUCH less than the total disk space.
>> Both of my data nodes have 3TB hard drives. Only 100GB of that is being
>> used for HDFS. Is it possible that I have a setting wrong somewhere?
>>
>> B.
>>
>
>
Re: hadoop not using whole disk for HDFS
Posted by "Adaryl \"Bob\" Wakefield, MBA" <ad...@hotmail.com>.
No it’s flat out saying that that config cannot be set with anything starting with /home.
Adaryl "Bob" Wakefield, MBA
Principal
Mass Street Analytics, LLC
913.938.6685
www.linkedin.com/in/bobwakefieldmba
Twitter: @BobLovesData
From: Naganarasimha G R (Naga)
Sent: Thursday, November 05, 2015 10:58 PM
To: user@hadoop.apache.org
Subject: RE: hadoop not using whole disk for HDFS
Hi Bob,
I am suspecting Ambari would not be allowing to create a folder directly under /home, might be it will allow /home/<user_name>/hdfs, since directories under /home is expected to be users home dir.
Regards,
+ Naga
--------------------------------------------------------------------------------
From: Naganarasimha G R (Naga) [garlanaganarasimha@huawei.com]
Sent: Friday, November 06, 2015 09:34
To: user@hadoop.apache.org
Subject: RE: hadoop not using whole disk for HDFS
Thanks Brahma, dint realize he might have configured both directories and i was assuming bob has configured single new directory "/hdfs/data".
So virtually its showing additional space,
manually try to add a data dir in /home, for your usecase, and restart datanodes.
Not sure about the impacs in Ambari but worth a try! , more permanent solution would be better remount
Filesystem Size Used Avail Use% Mounted on
/dev/mapper/centos-home 2.7T 33M 2.7T 1% /home
--------------------------------------------------------------------------------
From: Brahma Reddy Battula [brahmareddy.battula@huawei.com]
Sent: Friday, November 06, 2015 08:19
To: user@hadoop.apache.org
Subject: RE: hadoop not using whole disk for HDFS
For each configured dfs.datanode.data.dir , HDFS thinks its in separate partiotion and counts the capacity separately. So when another dir is added /hdfs/data, HDFS thinks new partition is added, So it increased the capacity 50GB per node. i.e. 100GB for 2 Nodes.
Not allowing /home directory to configure for data.dir might be ambari's constraint, instead you can manually try to add a data dir in /home, for your usecase, and restart datanodes.
Thanks & Regards
Brahma Reddy Battula
--------------------------------------------------------------------------------
From: Naganarasimha G R (Naga) [garlanaganarasimha@huawei.com]
Sent: Friday, November 06, 2015 7:20 AM
To: user@hadoop.apache.org
Subject: RE: hadoop not using whole disk for HDFS
Hi Bob,
1. I wasn’t able to set the config to /home/hdfs/data. I got an error that told me I’m not allowed to set that config to the /home directory. So I made it /hdfs/data.
Naga : I am not sure about the HDP Distro but if you make it point to /hdfs/data, still it will be pointing to the root mount itself i.e.
/dev/mapper/centos-root 50G 12G 39G 23% /
Other Alternative is to mount the drive to some other folder other than /home and then try.
2. When I restarted, the space available increased by a whopping 100GB.
Naga : I am particularly not sure how this happened may be you can again recheck if you enter the command "df -h <path of the NM data dir configured>" you will find out how much disk space is available on the related mount for which the path is configured.
Regards,
+ Naga
--------------------------------------------------------------------------------
From: Adaryl "Bob" Wakefield, MBA [adaryl.wakefield@hotmail.com]
Sent: Friday, November 06, 2015 06:54
To: user@hadoop.apache.org
Subject: Re: hadoop not using whole disk for HDFS
Is there a maximum amount of disk space that HDFS will use? Is 100GB that max? When we’re supposed to be dealing with “big data” why is the amount of data to be held on any one box such a small number when you’ve got terabytes available?
Adaryl "Bob" Wakefield, MBA
Principal
Mass Street Analytics, LLC
913.938.6685
www.linkedin.com/in/bobwakefieldmba
Twitter: @BobLovesData
From: Adaryl "Bob" Wakefield, MBA
Sent: Wednesday, November 04, 2015 4:38 PM
To: user@hadoop.apache.org
Subject: Re: hadoop not using whole disk for HDFS
This is an experimental cluster and there isn’t anything I can’t lose. I ran into some issues. I’m running the Hortonworks distro and am managing things through Ambari.
1. I wasn’t able to set the config to /home/hdfs/data. I got an error that told me I’m not allowed to set that config to the /home directory. So I made it /hdfs/data.
2. When I restarted, the space available increased by a whopping 100GB.
Adaryl "Bob" Wakefield, MBA
Principal
Mass Street Analytics, LLC
913.938.6685
www.linkedin.com/in/bobwakefieldmba
Twitter: @BobLovesData
From: Naganarasimha G R (Naga)
Sent: Wednesday, November 04, 2015 4:26 PM
To: user@hadoop.apache.org
Subject: RE: hadoop not using whole disk for HDFS
Better would be to stop the daemons and copy the data from /hadoop/hdfs/data to /home/hdfs/data , reconfigure dfs.datanode.data.dir to /home/hdfs/data and then start the daemons. If the data is comparitively less !
Ensure you have the backup if have any critical data !
Regards,
+ Naga
--------------------------------------------------------------------------------
From: Adaryl "Bob" Wakefield, MBA [adaryl.wakefield@hotmail.com]
Sent: Thursday, November 05, 2015 03:40
To: user@hadoop.apache.org
Subject: Re: hadoop not using whole disk for HDFS
So like I can just create a new folder in the home directory like:
home/hdfs/data
and then set dfs.datanode.data.dir to:
/hadoop/hdfs/data,home/hdfs/data
Restart the node and that should do it correct?
Adaryl "Bob" Wakefield, MBA
Principal
Mass Street Analytics, LLC
913.938.6685
www.linkedin.com/in/bobwakefieldmba
Twitter: @BobLovesData
From: Naganarasimha G R (Naga)
Sent: Wednesday, November 04, 2015 3:59 PM
To: user@hadoop.apache.org
Subject: RE: hadoop not using whole disk for HDFS
Hi Bob,
Seems like you have configured to disk dir to be other than an folder in /home, if so try creating another folder and add to "dfs.datanode.data.dir" seperated by comma instead of trying to reset the default.
And its also advised not to use the root partition "/" to be configured for HDFS data dir, if the Dir usage hits the maximum then OS might fail to function properly.
Regards,
+ Naga
--------------------------------------------------------------------------------
From: P lva [ruvikal@gmail.com]
Sent: Thursday, November 05, 2015 03:11
To: user@hadoop.apache.org
Subject: Re: hadoop not using whole disk for HDFS
What does your dfs.datanode.data.dir point to ?
On Wed, Nov 4, 2015 at 4:14 PM, Adaryl "Bob" Wakefield, MBA <ad...@hotmail.com> wrote:
Filesystem Size Used Avail Use% Mounted on
/dev/mapper/centos-root 50G 12G 39G 23% /
devtmpfs 16G 0 16G 0% /dev
tmpfs 16G 0 16G 0% /dev/shm
tmpfs 16G 1.4G 15G 9% /run
tmpfs 16G 0 16G 0% /sys/fs/cgroup
/dev/sda2 494M 123M 372M 25% /boot
/dev/mapper/centos-home 2.7T 33M 2.7T 1% /home
That’s from one datanode. The second one is nearly identical. I discovered that 50GB is actually a default. That seems really weird. Disk space is cheap. Why would you not just use most of the disk and why is it so hard to reset the default?
Adaryl "Bob" Wakefield, MBA
Principal
Mass Street Analytics, LLC
913.938.6685
www.linkedin.com/in/bobwakefieldmba
Twitter: @BobLovesData
From: Chris Nauroth
Sent: Wednesday, November 04, 2015 12:16 PM
To: user@hadoop.apache.org
Subject: Re: hadoop not using whole disk for HDFS
How are those drives partitioned? Is it possible that the directories pointed to by the dfs.datanode.data.dir property in hdfs-site.xml reside on partitions that are sized to only 100 GB? Running commands like df would be a good way to check this at the OS level, independently of Hadoop.
--Chris Nauroth
From: MBA <ad...@hotmail.com>
Reply-To: "user@hadoop.apache.org" <us...@hadoop.apache.org>
Date: Tuesday, November 3, 2015 at 11:16 AM
To: "user@hadoop.apache.org" <us...@hadoop.apache.org>
Subject: Re: hadoop not using whole disk for HDFS
Yeah. It has the current value of 1073741824 which is like 1.07 gig.
B.
From: Chris Nauroth
Sent: Tuesday, November 03, 2015 11:57 AM
To: user@hadoop.apache.org
Subject: Re: hadoop not using whole disk for HDFS
Hi Bob,
Does the hdfs-site.xml configuration file contain the property dfs.datanode.du.reserved? If this is defined, then the DataNode intentionally will not use this space for storage of replicas.
<property>
<name>dfs.datanode.du.reserved</name>
<value>0</value>
<description>Reserved space in bytes per volume. Always leave this much space free for non dfs use.
</description>
</property>
--Chris Nauroth
From: MBA <ad...@hotmail.com>
Reply-To: "user@hadoop.apache.org" <us...@hadoop.apache.org>
Date: Tuesday, November 3, 2015 at 10:51 AM
To: "user@hadoop.apache.org" <us...@hadoop.apache.org>
Subject: hadoop not using whole disk for HDFS
I’ve got the Hortonworks distro running on a three node cluster. For some reason the disk available for HDFS is MUCH less than the total disk space. Both of my data nodes have 3TB hard drives. Only 100GB of that is being used for HDFS. Is it possible that I have a setting wrong somewhere?
B.
Re: hadoop not using whole disk for HDFS
Posted by "Adaryl \"Bob\" Wakefield, MBA" <ad...@hotmail.com>.
No it’s flat out saying that that config cannot be set with anything starting with /home.
Adaryl "Bob" Wakefield, MBA
Principal
Mass Street Analytics, LLC
913.938.6685
www.linkedin.com/in/bobwakefieldmba
Twitter: @BobLovesData
From: Naganarasimha G R (Naga)
Sent: Thursday, November 05, 2015 10:58 PM
To: user@hadoop.apache.org
Subject: RE: hadoop not using whole disk for HDFS
Hi Bob,
I am suspecting Ambari would not be allowing to create a folder directly under /home, might be it will allow /home/<user_name>/hdfs, since directories under /home is expected to be users home dir.
Regards,
+ Naga
--------------------------------------------------------------------------------
From: Naganarasimha G R (Naga) [garlanaganarasimha@huawei.com]
Sent: Friday, November 06, 2015 09:34
To: user@hadoop.apache.org
Subject: RE: hadoop not using whole disk for HDFS
Thanks Brahma, dint realize he might have configured both directories and i was assuming bob has configured single new directory "/hdfs/data".
So virtually its showing additional space,
manually try to add a data dir in /home, for your usecase, and restart datanodes.
Not sure about the impacs in Ambari but worth a try! , more permanent solution would be better remount
Filesystem Size Used Avail Use% Mounted on
/dev/mapper/centos-home 2.7T 33M 2.7T 1% /home
--------------------------------------------------------------------------------
From: Brahma Reddy Battula [brahmareddy.battula@huawei.com]
Sent: Friday, November 06, 2015 08:19
To: user@hadoop.apache.org
Subject: RE: hadoop not using whole disk for HDFS
For each configured dfs.datanode.data.dir , HDFS thinks its in separate partiotion and counts the capacity separately. So when another dir is added /hdfs/data, HDFS thinks new partition is added, So it increased the capacity 50GB per node. i.e. 100GB for 2 Nodes.
Not allowing /home directory to configure for data.dir might be ambari's constraint, instead you can manually try to add a data dir in /home, for your usecase, and restart datanodes.
Thanks & Regards
Brahma Reddy Battula
--------------------------------------------------------------------------------
From: Naganarasimha G R (Naga) [garlanaganarasimha@huawei.com]
Sent: Friday, November 06, 2015 7:20 AM
To: user@hadoop.apache.org
Subject: RE: hadoop not using whole disk for HDFS
Hi Bob,
1. I wasn’t able to set the config to /home/hdfs/data. I got an error that told me I’m not allowed to set that config to the /home directory. So I made it /hdfs/data.
Naga : I am not sure about the HDP Distro but if you make it point to /hdfs/data, still it will be pointing to the root mount itself i.e.
/dev/mapper/centos-root 50G 12G 39G 23% /
Other Alternative is to mount the drive to some other folder other than /home and then try.
2. When I restarted, the space available increased by a whopping 100GB.
Naga : I am particularly not sure how this happened may be you can again recheck if you enter the command "df -h <path of the NM data dir configured>" you will find out how much disk space is available on the related mount for which the path is configured.
Regards,
+ Naga
--------------------------------------------------------------------------------
From: Adaryl "Bob" Wakefield, MBA [adaryl.wakefield@hotmail.com]
Sent: Friday, November 06, 2015 06:54
To: user@hadoop.apache.org
Subject: Re: hadoop not using whole disk for HDFS
Is there a maximum amount of disk space that HDFS will use? Is 100GB that max? When we’re supposed to be dealing with “big data” why is the amount of data to be held on any one box such a small number when you’ve got terabytes available?
Adaryl "Bob" Wakefield, MBA
Principal
Mass Street Analytics, LLC
913.938.6685
www.linkedin.com/in/bobwakefieldmba
Twitter: @BobLovesData
From: Adaryl "Bob" Wakefield, MBA
Sent: Wednesday, November 04, 2015 4:38 PM
To: user@hadoop.apache.org
Subject: Re: hadoop not using whole disk for HDFS
This is an experimental cluster and there isn’t anything I can’t lose. I ran into some issues. I’m running the Hortonworks distro and am managing things through Ambari.
1. I wasn’t able to set the config to /home/hdfs/data. I got an error that told me I’m not allowed to set that config to the /home directory. So I made it /hdfs/data.
2. When I restarted, the space available increased by a whopping 100GB.
Adaryl "Bob" Wakefield, MBA
Principal
Mass Street Analytics, LLC
913.938.6685
www.linkedin.com/in/bobwakefieldmba
Twitter: @BobLovesData
From: Naganarasimha G R (Naga)
Sent: Wednesday, November 04, 2015 4:26 PM
To: user@hadoop.apache.org
Subject: RE: hadoop not using whole disk for HDFS
Better would be to stop the daemons and copy the data from /hadoop/hdfs/data to /home/hdfs/data , reconfigure dfs.datanode.data.dir to /home/hdfs/data and then start the daemons. If the data is comparitively less !
Ensure you have the backup if have any critical data !
Regards,
+ Naga
--------------------------------------------------------------------------------
From: Adaryl "Bob" Wakefield, MBA [adaryl.wakefield@hotmail.com]
Sent: Thursday, November 05, 2015 03:40
To: user@hadoop.apache.org
Subject: Re: hadoop not using whole disk for HDFS
So like I can just create a new folder in the home directory like:
home/hdfs/data
and then set dfs.datanode.data.dir to:
/hadoop/hdfs/data,home/hdfs/data
Restart the node and that should do it correct?
Adaryl "Bob" Wakefield, MBA
Principal
Mass Street Analytics, LLC
913.938.6685
www.linkedin.com/in/bobwakefieldmba
Twitter: @BobLovesData
From: Naganarasimha G R (Naga)
Sent: Wednesday, November 04, 2015 3:59 PM
To: user@hadoop.apache.org
Subject: RE: hadoop not using whole disk for HDFS
Hi Bob,
Seems like you have configured to disk dir to be other than an folder in /home, if so try creating another folder and add to "dfs.datanode.data.dir" seperated by comma instead of trying to reset the default.
And its also advised not to use the root partition "/" to be configured for HDFS data dir, if the Dir usage hits the maximum then OS might fail to function properly.
Regards,
+ Naga
--------------------------------------------------------------------------------
From: P lva [ruvikal@gmail.com]
Sent: Thursday, November 05, 2015 03:11
To: user@hadoop.apache.org
Subject: Re: hadoop not using whole disk for HDFS
What does your dfs.datanode.data.dir point to ?
On Wed, Nov 4, 2015 at 4:14 PM, Adaryl "Bob" Wakefield, MBA <ad...@hotmail.com> wrote:
Filesystem Size Used Avail Use% Mounted on
/dev/mapper/centos-root 50G 12G 39G 23% /
devtmpfs 16G 0 16G 0% /dev
tmpfs 16G 0 16G 0% /dev/shm
tmpfs 16G 1.4G 15G 9% /run
tmpfs 16G 0 16G 0% /sys/fs/cgroup
/dev/sda2 494M 123M 372M 25% /boot
/dev/mapper/centos-home 2.7T 33M 2.7T 1% /home
That’s from one datanode. The second one is nearly identical. I discovered that 50GB is actually a default. That seems really weird. Disk space is cheap. Why would you not just use most of the disk and why is it so hard to reset the default?
Adaryl "Bob" Wakefield, MBA
Principal
Mass Street Analytics, LLC
913.938.6685
www.linkedin.com/in/bobwakefieldmba
Twitter: @BobLovesData
From: Chris Nauroth
Sent: Wednesday, November 04, 2015 12:16 PM
To: user@hadoop.apache.org
Subject: Re: hadoop not using whole disk for HDFS
How are those drives partitioned? Is it possible that the directories pointed to by the dfs.datanode.data.dir property in hdfs-site.xml reside on partitions that are sized to only 100 GB? Running commands like df would be a good way to check this at the OS level, independently of Hadoop.
--Chris Nauroth
From: MBA <ad...@hotmail.com>
Reply-To: "user@hadoop.apache.org" <us...@hadoop.apache.org>
Date: Tuesday, November 3, 2015 at 11:16 AM
To: "user@hadoop.apache.org" <us...@hadoop.apache.org>
Subject: Re: hadoop not using whole disk for HDFS
Yeah. It has the current value of 1073741824 which is like 1.07 gig.
B.
From: Chris Nauroth
Sent: Tuesday, November 03, 2015 11:57 AM
To: user@hadoop.apache.org
Subject: Re: hadoop not using whole disk for HDFS
Hi Bob,
Does the hdfs-site.xml configuration file contain the property dfs.datanode.du.reserved? If this is defined, then the DataNode intentionally will not use this space for storage of replicas.
<property>
<name>dfs.datanode.du.reserved</name>
<value>0</value>
<description>Reserved space in bytes per volume. Always leave this much space free for non dfs use.
</description>
</property>
--Chris Nauroth
From: MBA <ad...@hotmail.com>
Reply-To: "user@hadoop.apache.org" <us...@hadoop.apache.org>
Date: Tuesday, November 3, 2015 at 10:51 AM
To: "user@hadoop.apache.org" <us...@hadoop.apache.org>
Subject: hadoop not using whole disk for HDFS
I’ve got the Hortonworks distro running on a three node cluster. For some reason the disk available for HDFS is MUCH less than the total disk space. Both of my data nodes have 3TB hard drives. Only 100GB of that is being used for HDFS. Is it possible that I have a setting wrong somewhere?
B.
Re: hadoop not using whole disk for HDFS
Posted by "Adaryl \"Bob\" Wakefield, MBA" <ad...@hotmail.com>.
No it’s flat out saying that that config cannot be set with anything starting with /home.
Adaryl "Bob" Wakefield, MBA
Principal
Mass Street Analytics, LLC
913.938.6685
www.linkedin.com/in/bobwakefieldmba
Twitter: @BobLovesData
From: Naganarasimha G R (Naga)
Sent: Thursday, November 05, 2015 10:58 PM
To: user@hadoop.apache.org
Subject: RE: hadoop not using whole disk for HDFS
Hi Bob,
I am suspecting Ambari would not be allowing to create a folder directly under /home, might be it will allow /home/<user_name>/hdfs, since directories under /home is expected to be users home dir.
Regards,
+ Naga
--------------------------------------------------------------------------------
From: Naganarasimha G R (Naga) [garlanaganarasimha@huawei.com]
Sent: Friday, November 06, 2015 09:34
To: user@hadoop.apache.org
Subject: RE: hadoop not using whole disk for HDFS
Thanks Brahma, dint realize he might have configured both directories and i was assuming bob has configured single new directory "/hdfs/data".
So virtually its showing additional space,
manually try to add a data dir in /home, for your usecase, and restart datanodes.
Not sure about the impacs in Ambari but worth a try! , more permanent solution would be better remount
Filesystem Size Used Avail Use% Mounted on
/dev/mapper/centos-home 2.7T 33M 2.7T 1% /home
--------------------------------------------------------------------------------
From: Brahma Reddy Battula [brahmareddy.battula@huawei.com]
Sent: Friday, November 06, 2015 08:19
To: user@hadoop.apache.org
Subject: RE: hadoop not using whole disk for HDFS
For each configured dfs.datanode.data.dir , HDFS thinks its in separate partiotion and counts the capacity separately. So when another dir is added /hdfs/data, HDFS thinks new partition is added, So it increased the capacity 50GB per node. i.e. 100GB for 2 Nodes.
Not allowing /home directory to configure for data.dir might be ambari's constraint, instead you can manually try to add a data dir in /home, for your usecase, and restart datanodes.
Thanks & Regards
Brahma Reddy Battula
--------------------------------------------------------------------------------
From: Naganarasimha G R (Naga) [garlanaganarasimha@huawei.com]
Sent: Friday, November 06, 2015 7:20 AM
To: user@hadoop.apache.org
Subject: RE: hadoop not using whole disk for HDFS
Hi Bob,
1. I wasn’t able to set the config to /home/hdfs/data. I got an error that told me I’m not allowed to set that config to the /home directory. So I made it /hdfs/data.
Naga : I am not sure about the HDP Distro but if you make it point to /hdfs/data, still it will be pointing to the root mount itself i.e.
/dev/mapper/centos-root 50G 12G 39G 23% /
Other Alternative is to mount the drive to some other folder other than /home and then try.
2. When I restarted, the space available increased by a whopping 100GB.
Naga : I am particularly not sure how this happened may be you can again recheck if you enter the command "df -h <path of the NM data dir configured>" you will find out how much disk space is available on the related mount for which the path is configured.
Regards,
+ Naga
--------------------------------------------------------------------------------
From: Adaryl "Bob" Wakefield, MBA [adaryl.wakefield@hotmail.com]
Sent: Friday, November 06, 2015 06:54
To: user@hadoop.apache.org
Subject: Re: hadoop not using whole disk for HDFS
Is there a maximum amount of disk space that HDFS will use? Is 100GB that max? When we’re supposed to be dealing with “big data” why is the amount of data to be held on any one box such a small number when you’ve got terabytes available?
Adaryl "Bob" Wakefield, MBA
Principal
Mass Street Analytics, LLC
913.938.6685
www.linkedin.com/in/bobwakefieldmba
Twitter: @BobLovesData
From: Adaryl "Bob" Wakefield, MBA
Sent: Wednesday, November 04, 2015 4:38 PM
To: user@hadoop.apache.org
Subject: Re: hadoop not using whole disk for HDFS
This is an experimental cluster and there isn’t anything I can’t lose. I ran into some issues. I’m running the Hortonworks distro and am managing things through Ambari.
1. I wasn’t able to set the config to /home/hdfs/data. I got an error that told me I’m not allowed to set that config to the /home directory. So I made it /hdfs/data.
2. When I restarted, the space available increased by a whopping 100GB.
Adaryl "Bob" Wakefield, MBA
Principal
Mass Street Analytics, LLC
913.938.6685
www.linkedin.com/in/bobwakefieldmba
Twitter: @BobLovesData
From: Naganarasimha G R (Naga)
Sent: Wednesday, November 04, 2015 4:26 PM
To: user@hadoop.apache.org
Subject: RE: hadoop not using whole disk for HDFS
Better would be to stop the daemons and copy the data from /hadoop/hdfs/data to /home/hdfs/data , reconfigure dfs.datanode.data.dir to /home/hdfs/data and then start the daemons. If the data is comparitively less !
Ensure you have the backup if have any critical data !
Regards,
+ Naga
--------------------------------------------------------------------------------
From: Adaryl "Bob" Wakefield, MBA [adaryl.wakefield@hotmail.com]
Sent: Thursday, November 05, 2015 03:40
To: user@hadoop.apache.org
Subject: Re: hadoop not using whole disk for HDFS
So like I can just create a new folder in the home directory like:
home/hdfs/data
and then set dfs.datanode.data.dir to:
/hadoop/hdfs/data,home/hdfs/data
Restart the node and that should do it correct?
Adaryl "Bob" Wakefield, MBA
Principal
Mass Street Analytics, LLC
913.938.6685
www.linkedin.com/in/bobwakefieldmba
Twitter: @BobLovesData
From: Naganarasimha G R (Naga)
Sent: Wednesday, November 04, 2015 3:59 PM
To: user@hadoop.apache.org
Subject: RE: hadoop not using whole disk for HDFS
Hi Bob,
Seems like you have configured to disk dir to be other than an folder in /home, if so try creating another folder and add to "dfs.datanode.data.dir" seperated by comma instead of trying to reset the default.
And its also advised not to use the root partition "/" to be configured for HDFS data dir, if the Dir usage hits the maximum then OS might fail to function properly.
Regards,
+ Naga
--------------------------------------------------------------------------------
From: P lva [ruvikal@gmail.com]
Sent: Thursday, November 05, 2015 03:11
To: user@hadoop.apache.org
Subject: Re: hadoop not using whole disk for HDFS
What does your dfs.datanode.data.dir point to ?
On Wed, Nov 4, 2015 at 4:14 PM, Adaryl "Bob" Wakefield, MBA <ad...@hotmail.com> wrote:
Filesystem Size Used Avail Use% Mounted on
/dev/mapper/centos-root 50G 12G 39G 23% /
devtmpfs 16G 0 16G 0% /dev
tmpfs 16G 0 16G 0% /dev/shm
tmpfs 16G 1.4G 15G 9% /run
tmpfs 16G 0 16G 0% /sys/fs/cgroup
/dev/sda2 494M 123M 372M 25% /boot
/dev/mapper/centos-home 2.7T 33M 2.7T 1% /home
That’s from one datanode. The second one is nearly identical. I discovered that 50GB is actually a default. That seems really weird. Disk space is cheap. Why would you not just use most of the disk and why is it so hard to reset the default?
Adaryl "Bob" Wakefield, MBA
Principal
Mass Street Analytics, LLC
913.938.6685
www.linkedin.com/in/bobwakefieldmba
Twitter: @BobLovesData
From: Chris Nauroth
Sent: Wednesday, November 04, 2015 12:16 PM
To: user@hadoop.apache.org
Subject: Re: hadoop not using whole disk for HDFS
How are those drives partitioned? Is it possible that the directories pointed to by the dfs.datanode.data.dir property in hdfs-site.xml reside on partitions that are sized to only 100 GB? Running commands like df would be a good way to check this at the OS level, independently of Hadoop.
--Chris Nauroth
From: MBA <ad...@hotmail.com>
Reply-To: "user@hadoop.apache.org" <us...@hadoop.apache.org>
Date: Tuesday, November 3, 2015 at 11:16 AM
To: "user@hadoop.apache.org" <us...@hadoop.apache.org>
Subject: Re: hadoop not using whole disk for HDFS
Yeah. It has the current value of 1073741824 which is like 1.07 gig.
B.
From: Chris Nauroth
Sent: Tuesday, November 03, 2015 11:57 AM
To: user@hadoop.apache.org
Subject: Re: hadoop not using whole disk for HDFS
Hi Bob,
Does the hdfs-site.xml configuration file contain the property dfs.datanode.du.reserved? If this is defined, then the DataNode intentionally will not use this space for storage of replicas.
<property>
<name>dfs.datanode.du.reserved</name>
<value>0</value>
<description>Reserved space in bytes per volume. Always leave this much space free for non dfs use.
</description>
</property>
--Chris Nauroth
From: MBA <ad...@hotmail.com>
Reply-To: "user@hadoop.apache.org" <us...@hadoop.apache.org>
Date: Tuesday, November 3, 2015 at 10:51 AM
To: "user@hadoop.apache.org" <us...@hadoop.apache.org>
Subject: hadoop not using whole disk for HDFS
I’ve got the Hortonworks distro running on a three node cluster. For some reason the disk available for HDFS is MUCH less than the total disk space. Both of my data nodes have 3TB hard drives. Only 100GB of that is being used for HDFS. Is it possible that I have a setting wrong somewhere?
B.
Re: hadoop not using whole disk for HDFS
Posted by "Adaryl \"Bob\" Wakefield, MBA" <ad...@hotmail.com>.
No it’s flat out saying that that config cannot be set with anything starting with /home.
Adaryl "Bob" Wakefield, MBA
Principal
Mass Street Analytics, LLC
913.938.6685
www.linkedin.com/in/bobwakefieldmba
Twitter: @BobLovesData
From: Naganarasimha G R (Naga)
Sent: Thursday, November 05, 2015 10:58 PM
To: user@hadoop.apache.org
Subject: RE: hadoop not using whole disk for HDFS
Hi Bob,
I am suspecting Ambari would not be allowing to create a folder directly under /home, might be it will allow /home/<user_name>/hdfs, since directories under /home is expected to be users home dir.
Regards,
+ Naga
--------------------------------------------------------------------------------
From: Naganarasimha G R (Naga) [garlanaganarasimha@huawei.com]
Sent: Friday, November 06, 2015 09:34
To: user@hadoop.apache.org
Subject: RE: hadoop not using whole disk for HDFS
Thanks Brahma, dint realize he might have configured both directories and i was assuming bob has configured single new directory "/hdfs/data".
So virtually its showing additional space,
manually try to add a data dir in /home, for your usecase, and restart datanodes.
Not sure about the impacs in Ambari but worth a try! , more permanent solution would be better remount
Filesystem Size Used Avail Use% Mounted on
/dev/mapper/centos-home 2.7T 33M 2.7T 1% /home
--------------------------------------------------------------------------------
From: Brahma Reddy Battula [brahmareddy.battula@huawei.com]
Sent: Friday, November 06, 2015 08:19
To: user@hadoop.apache.org
Subject: RE: hadoop not using whole disk for HDFS
For each configured dfs.datanode.data.dir , HDFS thinks its in separate partiotion and counts the capacity separately. So when another dir is added /hdfs/data, HDFS thinks new partition is added, So it increased the capacity 50GB per node. i.e. 100GB for 2 Nodes.
Not allowing /home directory to configure for data.dir might be ambari's constraint, instead you can manually try to add a data dir in /home, for your usecase, and restart datanodes.
Thanks & Regards
Brahma Reddy Battula
--------------------------------------------------------------------------------
From: Naganarasimha G R (Naga) [garlanaganarasimha@huawei.com]
Sent: Friday, November 06, 2015 7:20 AM
To: user@hadoop.apache.org
Subject: RE: hadoop not using whole disk for HDFS
Hi Bob,
1. I wasn’t able to set the config to /home/hdfs/data. I got an error that told me I’m not allowed to set that config to the /home directory. So I made it /hdfs/data.
Naga : I am not sure about the HDP Distro but if you make it point to /hdfs/data, still it will be pointing to the root mount itself i.e.
/dev/mapper/centos-root 50G 12G 39G 23% /
Other Alternative is to mount the drive to some other folder other than /home and then try.
2. When I restarted, the space available increased by a whopping 100GB.
Naga : I am particularly not sure how this happened may be you can again recheck if you enter the command "df -h <path of the NM data dir configured>" you will find out how much disk space is available on the related mount for which the path is configured.
Regards,
+ Naga
--------------------------------------------------------------------------------
From: Adaryl "Bob" Wakefield, MBA [adaryl.wakefield@hotmail.com]
Sent: Friday, November 06, 2015 06:54
To: user@hadoop.apache.org
Subject: Re: hadoop not using whole disk for HDFS
Is there a maximum amount of disk space that HDFS will use? Is 100GB that max? When we’re supposed to be dealing with “big data” why is the amount of data to be held on any one box such a small number when you’ve got terabytes available?
Adaryl "Bob" Wakefield, MBA
Principal
Mass Street Analytics, LLC
913.938.6685
www.linkedin.com/in/bobwakefieldmba
Twitter: @BobLovesData
From: Adaryl "Bob" Wakefield, MBA
Sent: Wednesday, November 04, 2015 4:38 PM
To: user@hadoop.apache.org
Subject: Re: hadoop not using whole disk for HDFS
This is an experimental cluster and there isn’t anything I can’t lose. I ran into some issues. I’m running the Hortonworks distro and am managing things through Ambari.
1. I wasn’t able to set the config to /home/hdfs/data. I got an error that told me I’m not allowed to set that config to the /home directory. So I made it /hdfs/data.
2. When I restarted, the space available increased by a whopping 100GB.
Adaryl "Bob" Wakefield, MBA
Principal
Mass Street Analytics, LLC
913.938.6685
www.linkedin.com/in/bobwakefieldmba
Twitter: @BobLovesData
From: Naganarasimha G R (Naga)
Sent: Wednesday, November 04, 2015 4:26 PM
To: user@hadoop.apache.org
Subject: RE: hadoop not using whole disk for HDFS
Better would be to stop the daemons and copy the data from /hadoop/hdfs/data to /home/hdfs/data , reconfigure dfs.datanode.data.dir to /home/hdfs/data and then start the daemons. If the data is comparitively less !
Ensure you have the backup if have any critical data !
Regards,
+ Naga
--------------------------------------------------------------------------------
From: Adaryl "Bob" Wakefield, MBA [adaryl.wakefield@hotmail.com]
Sent: Thursday, November 05, 2015 03:40
To: user@hadoop.apache.org
Subject: Re: hadoop not using whole disk for HDFS
So like I can just create a new folder in the home directory like:
home/hdfs/data
and then set dfs.datanode.data.dir to:
/hadoop/hdfs/data,home/hdfs/data
Restart the node and that should do it correct?
Adaryl "Bob" Wakefield, MBA
Principal
Mass Street Analytics, LLC
913.938.6685
www.linkedin.com/in/bobwakefieldmba
Twitter: @BobLovesData
From: Naganarasimha G R (Naga)
Sent: Wednesday, November 04, 2015 3:59 PM
To: user@hadoop.apache.org
Subject: RE: hadoop not using whole disk for HDFS
Hi Bob,
Seems like you have configured to disk dir to be other than an folder in /home, if so try creating another folder and add to "dfs.datanode.data.dir" seperated by comma instead of trying to reset the default.
And its also advised not to use the root partition "/" to be configured for HDFS data dir, if the Dir usage hits the maximum then OS might fail to function properly.
Regards,
+ Naga
--------------------------------------------------------------------------------
From: P lva [ruvikal@gmail.com]
Sent: Thursday, November 05, 2015 03:11
To: user@hadoop.apache.org
Subject: Re: hadoop not using whole disk for HDFS
What does your dfs.datanode.data.dir point to ?
On Wed, Nov 4, 2015 at 4:14 PM, Adaryl "Bob" Wakefield, MBA <ad...@hotmail.com> wrote:
Filesystem Size Used Avail Use% Mounted on
/dev/mapper/centos-root 50G 12G 39G 23% /
devtmpfs 16G 0 16G 0% /dev
tmpfs 16G 0 16G 0% /dev/shm
tmpfs 16G 1.4G 15G 9% /run
tmpfs 16G 0 16G 0% /sys/fs/cgroup
/dev/sda2 494M 123M 372M 25% /boot
/dev/mapper/centos-home 2.7T 33M 2.7T 1% /home
That’s from one datanode. The second one is nearly identical. I discovered that 50GB is actually a default. That seems really weird. Disk space is cheap. Why would you not just use most of the disk and why is it so hard to reset the default?
Adaryl "Bob" Wakefield, MBA
Principal
Mass Street Analytics, LLC
913.938.6685
www.linkedin.com/in/bobwakefieldmba
Twitter: @BobLovesData
From: Chris Nauroth
Sent: Wednesday, November 04, 2015 12:16 PM
To: user@hadoop.apache.org
Subject: Re: hadoop not using whole disk for HDFS
How are those drives partitioned? Is it possible that the directories pointed to by the dfs.datanode.data.dir property in hdfs-site.xml reside on partitions that are sized to only 100 GB? Running commands like df would be a good way to check this at the OS level, independently of Hadoop.
--Chris Nauroth
From: MBA <ad...@hotmail.com>
Reply-To: "user@hadoop.apache.org" <us...@hadoop.apache.org>
Date: Tuesday, November 3, 2015 at 11:16 AM
To: "user@hadoop.apache.org" <us...@hadoop.apache.org>
Subject: Re: hadoop not using whole disk for HDFS
Yeah. It has the current value of 1073741824 which is like 1.07 gig.
B.
From: Chris Nauroth
Sent: Tuesday, November 03, 2015 11:57 AM
To: user@hadoop.apache.org
Subject: Re: hadoop not using whole disk for HDFS
Hi Bob,
Does the hdfs-site.xml configuration file contain the property dfs.datanode.du.reserved? If this is defined, then the DataNode intentionally will not use this space for storage of replicas.
<property>
<name>dfs.datanode.du.reserved</name>
<value>0</value>
<description>Reserved space in bytes per volume. Always leave this much space free for non dfs use.
</description>
</property>
--Chris Nauroth
From: MBA <ad...@hotmail.com>
Reply-To: "user@hadoop.apache.org" <us...@hadoop.apache.org>
Date: Tuesday, November 3, 2015 at 10:51 AM
To: "user@hadoop.apache.org" <us...@hadoop.apache.org>
Subject: hadoop not using whole disk for HDFS
I’ve got the Hortonworks distro running on a three node cluster. For some reason the disk available for HDFS is MUCH less than the total disk space. Both of my data nodes have 3TB hard drives. Only 100GB of that is being used for HDFS. Is it possible that I have a setting wrong somewhere?
B.
RE: hadoop not using whole disk for HDFS
Posted by "Naganarasimha G R (Naga)" <ga...@huawei.com>.
Hi Bob,
I am suspecting Ambari would not be allowing to create a folder directly under /home, might be it will allow /home/<user_name>/hdfs, since directories under /home is expected to be users home dir.
Regards,
+ Naga
________________________________
From: Naganarasimha G R (Naga) [garlanaganarasimha@huawei.com]
Sent: Friday, November 06, 2015 09:34
To: user@hadoop.apache.org
Subject: RE: hadoop not using whole disk for HDFS
Thanks Brahma, dint realize he might have configured both directories and i was assuming bob has configured single new directory "/hdfs/data".
So virtually its showing additional space,
manually try to add a data dir in /home, for your usecase, and restart datanodes.
Not sure about the impacs in Ambari but worth a try! , more permanent solution would be better remount
Filesystem Size Used Avail Use% Mounted on
/dev/mapper/centos-home 2.7T 33M 2.7T 1% /home
________________________________
From: Brahma Reddy Battula [brahmareddy.battula@huawei.com]
Sent: Friday, November 06, 2015 08:19
To: user@hadoop.apache.org
Subject: RE: hadoop not using whole disk for HDFS
For each configured dfs.datanode.data.dir , HDFS thinks its in separate partiotion and counts the capacity separately. So when another dir is added /hdfs/data, HDFS thinks new partition is added, So it increased the capacity 50GB per node. i.e. 100GB for 2 Nodes.
Not allowing /home directory to configure for data.dir might be ambari's constraint, instead you can manually try to add a data dir in /home, for your usecase, and restart datanodes.
Thanks & Regards
Brahma Reddy Battula
________________________________
From: Naganarasimha G R (Naga) [garlanaganarasimha@huawei.com]
Sent: Friday, November 06, 2015 7:20 AM
To: user@hadoop.apache.org
Subject: RE: hadoop not using whole disk for HDFS
Hi Bob,
1. I wasn’t able to set the config to /home/hdfs/data. I got an error that told me I’m not allowed to set that config to the /home directory. So I made it /hdfs/data.
Naga : I am not sure about the HDP Distro but if you make it point to /hdfs/data, still it will be pointing to the root mount itself i.e.
/dev/mapper/centos-root 50G 12G 39G 23% /
Other Alternative is to mount the drive to some other folder other than /home and then try.
2. When I restarted, the space available increased by a whopping 100GB.
Naga : I am particularly not sure how this happened may be you can again recheck if you enter the command "df -h <path of the NM data dir configured>" you will find out how much disk space is available on the related mount for which the path is configured.
Regards,
+ Naga
________________________________
From: Adaryl "Bob" Wakefield, MBA [adaryl.wakefield@hotmail.com]
Sent: Friday, November 06, 2015 06:54
To: user@hadoop.apache.org
Subject: Re: hadoop not using whole disk for HDFS
Is there a maximum amount of disk space that HDFS will use? Is 100GB that max? When we’re supposed to be dealing with “big data” why is the amount of data to be held on any one box such a small number when you’ve got terabytes available?
Adaryl "Bob" Wakefield, MBA
Principal
Mass Street Analytics, LLC
913.938.6685
www.linkedin.com/in/bobwakefieldmba
Twitter: @BobLovesData
From: Adaryl "Bob" Wakefield, MBA<ma...@hotmail.com>
Sent: Wednesday, November 04, 2015 4:38 PM
To: user@hadoop.apache.org<ma...@hadoop.apache.org>
Subject: Re: hadoop not using whole disk for HDFS
This is an experimental cluster and there isn’t anything I can’t lose. I ran into some issues. I’m running the Hortonworks distro and am managing things through Ambari.
1. I wasn’t able to set the config to /home/hdfs/data. I got an error that told me I’m not allowed to set that config to the /home directory. So I made it /hdfs/data.
2. When I restarted, the space available increased by a whopping 100GB.
Adaryl "Bob" Wakefield, MBA
Principal
Mass Street Analytics, LLC
913.938.6685
www.linkedin.com/in/bobwakefieldmba
Twitter: @BobLovesData
From: Naganarasimha G R (Naga)<ma...@huawei.com>
Sent: Wednesday, November 04, 2015 4:26 PM
To: user@hadoop.apache.org<ma...@hadoop.apache.org>
Subject: RE: hadoop not using whole disk for HDFS
Better would be to stop the daemons and copy the data from /hadoop/hdfs/data to /home/hdfs/data , reconfigure dfs.datanode.data.dir to /home/hdfs/data and then start the daemons. If the data is comparitively less !
Ensure you have the backup if have any critical data !
Regards,
+ Naga
________________________________
From: Adaryl "Bob" Wakefield, MBA [adaryl.wakefield@hotmail.com]
Sent: Thursday, November 05, 2015 03:40
To: user@hadoop.apache.org
Subject: Re: hadoop not using whole disk for HDFS
So like I can just create a new folder in the home directory like:
home/hdfs/data
and then set dfs.datanode.data.dir to:
/hadoop/hdfs/data,home/hdfs/data
Restart the node and that should do it correct?
Adaryl "Bob" Wakefield, MBA
Principal
Mass Street Analytics, LLC
913.938.6685
www.linkedin.com/in/bobwakefieldmba
Twitter: @BobLovesData
From: Naganarasimha G R (Naga)<ma...@huawei.com>
Sent: Wednesday, November 04, 2015 3:59 PM
To: user@hadoop.apache.org<ma...@hadoop.apache.org>
Subject: RE: hadoop not using whole disk for HDFS
Hi Bob,
Seems like you have configured to disk dir to be other than an folder in /home, if so try creating another folder and add to "dfs.datanode.data.dir" seperated by comma instead of trying to reset the default.
And its also advised not to use the root partition "/" to be configured for HDFS data dir, if the Dir usage hits the maximum then OS might fail to function properly.
Regards,
+ Naga
________________________________
From: P lva [ruvikal@gmail.com]
Sent: Thursday, November 05, 2015 03:11
To: user@hadoop.apache.org
Subject: Re: hadoop not using whole disk for HDFS
What does your dfs.datanode.data.dir point to ?
On Wed, Nov 4, 2015 at 4:14 PM, Adaryl "Bob" Wakefield, MBA <ad...@hotmail.com>> wrote:
Filesystem Size Used Avail Use% Mounted on
/dev/mapper/centos-root 50G 12G 39G 23% /
devtmpfs 16G 0 16G 0% /dev
tmpfs 16G 0 16G 0% /dev/shm
tmpfs 16G 1.4G 15G 9% /run
tmpfs 16G 0 16G 0% /sys/fs/cgroup
/dev/sda2 494M 123M 372M 25% /boot
/dev/mapper/centos-home 2.7T 33M 2.7T 1% /home
That’s from one datanode. The second one is nearly identical. I discovered that 50GB is actually a default. That seems really weird. Disk space is cheap. Why would you not just use most of the disk and why is it so hard to reset the default?
Adaryl "Bob" Wakefield, MBA
Principal
Mass Street Analytics, LLC
913.938.6685<tel:913.938.6685>
www.linkedin.com/in/bobwakefieldmba<http://www.linkedin.com/in/bobwakefieldmba>
Twitter: @BobLovesData
From: Chris Nauroth<ma...@hortonworks.com>
Sent: Wednesday, November 04, 2015 12:16 PM
To: user@hadoop.apache.org<ma...@hadoop.apache.org>
Subject: Re: hadoop not using whole disk for HDFS
How are those drives partitioned? Is it possible that the directories pointed to by the dfs.datanode.data.dir property in hdfs-site.xml reside on partitions that are sized to only 100 GB? Running commands like df would be a good way to check this at the OS level, independently of Hadoop.
--Chris Nauroth
From: MBA <ad...@hotmail.com>>
Reply-To: "user@hadoop.apache.org<ma...@hadoop.apache.org>" <us...@hadoop.apache.org>>
Date: Tuesday, November 3, 2015 at 11:16 AM
To: "user@hadoop.apache.org<ma...@hadoop.apache.org>" <us...@hadoop.apache.org>>
Subject: Re: hadoop not using whole disk for HDFS
Yeah. It has the current value of 1073741824 which is like 1.07 gig.
B.
From: Chris Nauroth<ma...@hortonworks.com>
Sent: Tuesday, November 03, 2015 11:57 AM
To: user@hadoop.apache.org<ma...@hadoop.apache.org>
Subject: Re: hadoop not using whole disk for HDFS
Hi Bob,
Does the hdfs-site.xml configuration file contain the property dfs.datanode.du.reserved? If this is defined, then the DataNode intentionally will not use this space for storage of replicas.
<property>
<name>dfs.datanode.du.reserved</name>
<value>0</value>
<description>Reserved space in bytes per volume. Always leave this much space free for non dfs use.
</description>
</property>
--Chris Nauroth
From: MBA <ad...@hotmail.com>>
Reply-To: "user@hadoop.apache.org<ma...@hadoop.apache.org>" <us...@hadoop.apache.org>>
Date: Tuesday, November 3, 2015 at 10:51 AM
To: "user@hadoop.apache.org<ma...@hadoop.apache.org>" <us...@hadoop.apache.org>>
Subject: hadoop not using whole disk for HDFS
I’ve got the Hortonworks distro running on a three node cluster. For some reason the disk available for HDFS is MUCH less than the total disk space. Both of my data nodes have 3TB hard drives. Only 100GB of that is being used for HDFS. Is it possible that I have a setting wrong somewhere?
B.
RE: hadoop not using whole disk for HDFS
Posted by "Naganarasimha G R (Naga)" <ga...@huawei.com>.
Hi Bob,
I am suspecting Ambari would not be allowing to create a folder directly under /home, might be it will allow /home/<user_name>/hdfs, since directories under /home is expected to be users home dir.
Regards,
+ Naga
________________________________
From: Naganarasimha G R (Naga) [garlanaganarasimha@huawei.com]
Sent: Friday, November 06, 2015 09:34
To: user@hadoop.apache.org
Subject: RE: hadoop not using whole disk for HDFS
Thanks Brahma, dint realize he might have configured both directories and i was assuming bob has configured single new directory "/hdfs/data".
So virtually its showing additional space,
manually try to add a data dir in /home, for your usecase, and restart datanodes.
Not sure about the impacs in Ambari but worth a try! , more permanent solution would be better remount
Filesystem Size Used Avail Use% Mounted on
/dev/mapper/centos-home 2.7T 33M 2.7T 1% /home
________________________________
From: Brahma Reddy Battula [brahmareddy.battula@huawei.com]
Sent: Friday, November 06, 2015 08:19
To: user@hadoop.apache.org
Subject: RE: hadoop not using whole disk for HDFS
For each configured dfs.datanode.data.dir , HDFS thinks its in separate partiotion and counts the capacity separately. So when another dir is added /hdfs/data, HDFS thinks new partition is added, So it increased the capacity 50GB per node. i.e. 100GB for 2 Nodes.
Not allowing /home directory to configure for data.dir might be ambari's constraint, instead you can manually try to add a data dir in /home, for your usecase, and restart datanodes.
Thanks & Regards
Brahma Reddy Battula
________________________________
From: Naganarasimha G R (Naga) [garlanaganarasimha@huawei.com]
Sent: Friday, November 06, 2015 7:20 AM
To: user@hadoop.apache.org
Subject: RE: hadoop not using whole disk for HDFS
Hi Bob,
1. I wasn’t able to set the config to /home/hdfs/data. I got an error that told me I’m not allowed to set that config to the /home directory. So I made it /hdfs/data.
Naga : I am not sure about the HDP Distro but if you make it point to /hdfs/data, still it will be pointing to the root mount itself i.e.
/dev/mapper/centos-root 50G 12G 39G 23% /
Other Alternative is to mount the drive to some other folder other than /home and then try.
2. When I restarted, the space available increased by a whopping 100GB.
Naga : I am particularly not sure how this happened may be you can again recheck if you enter the command "df -h <path of the NM data dir configured>" you will find out how much disk space is available on the related mount for which the path is configured.
Regards,
+ Naga
________________________________
From: Adaryl "Bob" Wakefield, MBA [adaryl.wakefield@hotmail.com]
Sent: Friday, November 06, 2015 06:54
To: user@hadoop.apache.org
Subject: Re: hadoop not using whole disk for HDFS
Is there a maximum amount of disk space that HDFS will use? Is 100GB that max? When we’re supposed to be dealing with “big data” why is the amount of data to be held on any one box such a small number when you’ve got terabytes available?
Adaryl "Bob" Wakefield, MBA
Principal
Mass Street Analytics, LLC
913.938.6685
www.linkedin.com/in/bobwakefieldmba
Twitter: @BobLovesData
From: Adaryl "Bob" Wakefield, MBA<ma...@hotmail.com>
Sent: Wednesday, November 04, 2015 4:38 PM
To: user@hadoop.apache.org<ma...@hadoop.apache.org>
Subject: Re: hadoop not using whole disk for HDFS
This is an experimental cluster and there isn’t anything I can’t lose. I ran into some issues. I’m running the Hortonworks distro and am managing things through Ambari.
1. I wasn’t able to set the config to /home/hdfs/data. I got an error that told me I’m not allowed to set that config to the /home directory. So I made it /hdfs/data.
2. When I restarted, the space available increased by a whopping 100GB.
Adaryl "Bob" Wakefield, MBA
Principal
Mass Street Analytics, LLC
913.938.6685
www.linkedin.com/in/bobwakefieldmba
Twitter: @BobLovesData
From: Naganarasimha G R (Naga)<ma...@huawei.com>
Sent: Wednesday, November 04, 2015 4:26 PM
To: user@hadoop.apache.org<ma...@hadoop.apache.org>
Subject: RE: hadoop not using whole disk for HDFS
Better would be to stop the daemons and copy the data from /hadoop/hdfs/data to /home/hdfs/data , reconfigure dfs.datanode.data.dir to /home/hdfs/data and then start the daemons. If the data is comparitively less !
Ensure you have the backup if have any critical data !
Regards,
+ Naga
________________________________
From: Adaryl "Bob" Wakefield, MBA [adaryl.wakefield@hotmail.com]
Sent: Thursday, November 05, 2015 03:40
To: user@hadoop.apache.org
Subject: Re: hadoop not using whole disk for HDFS
So like I can just create a new folder in the home directory like:
home/hdfs/data
and then set dfs.datanode.data.dir to:
/hadoop/hdfs/data,home/hdfs/data
Restart the node and that should do it correct?
Adaryl "Bob" Wakefield, MBA
Principal
Mass Street Analytics, LLC
913.938.6685
www.linkedin.com/in/bobwakefieldmba
Twitter: @BobLovesData
From: Naganarasimha G R (Naga)<ma...@huawei.com>
Sent: Wednesday, November 04, 2015 3:59 PM
To: user@hadoop.apache.org<ma...@hadoop.apache.org>
Subject: RE: hadoop not using whole disk for HDFS
Hi Bob,
Seems like you have configured to disk dir to be other than an folder in /home, if so try creating another folder and add to "dfs.datanode.data.dir" seperated by comma instead of trying to reset the default.
And its also advised not to use the root partition "/" to be configured for HDFS data dir, if the Dir usage hits the maximum then OS might fail to function properly.
Regards,
+ Naga
________________________________
From: P lva [ruvikal@gmail.com]
Sent: Thursday, November 05, 2015 03:11
To: user@hadoop.apache.org
Subject: Re: hadoop not using whole disk for HDFS
What does your dfs.datanode.data.dir point to ?
On Wed, Nov 4, 2015 at 4:14 PM, Adaryl "Bob" Wakefield, MBA <ad...@hotmail.com>> wrote:
Filesystem Size Used Avail Use% Mounted on
/dev/mapper/centos-root 50G 12G 39G 23% /
devtmpfs 16G 0 16G 0% /dev
tmpfs 16G 0 16G 0% /dev/shm
tmpfs 16G 1.4G 15G 9% /run
tmpfs 16G 0 16G 0% /sys/fs/cgroup
/dev/sda2 494M 123M 372M 25% /boot
/dev/mapper/centos-home 2.7T 33M 2.7T 1% /home
That’s from one datanode. The second one is nearly identical. I discovered that 50GB is actually a default. That seems really weird. Disk space is cheap. Why would you not just use most of the disk and why is it so hard to reset the default?
Adaryl "Bob" Wakefield, MBA
Principal
Mass Street Analytics, LLC
913.938.6685<tel:913.938.6685>
www.linkedin.com/in/bobwakefieldmba<http://www.linkedin.com/in/bobwakefieldmba>
Twitter: @BobLovesData
From: Chris Nauroth<ma...@hortonworks.com>
Sent: Wednesday, November 04, 2015 12:16 PM
To: user@hadoop.apache.org<ma...@hadoop.apache.org>
Subject: Re: hadoop not using whole disk for HDFS
How are those drives partitioned? Is it possible that the directories pointed to by the dfs.datanode.data.dir property in hdfs-site.xml reside on partitions that are sized to only 100 GB? Running commands like df would be a good way to check this at the OS level, independently of Hadoop.
--Chris Nauroth
From: MBA <ad...@hotmail.com>>
Reply-To: "user@hadoop.apache.org<ma...@hadoop.apache.org>" <us...@hadoop.apache.org>>
Date: Tuesday, November 3, 2015 at 11:16 AM
To: "user@hadoop.apache.org<ma...@hadoop.apache.org>" <us...@hadoop.apache.org>>
Subject: Re: hadoop not using whole disk for HDFS
Yeah. It has the current value of 1073741824 which is like 1.07 gig.
B.
From: Chris Nauroth<ma...@hortonworks.com>
Sent: Tuesday, November 03, 2015 11:57 AM
To: user@hadoop.apache.org<ma...@hadoop.apache.org>
Subject: Re: hadoop not using whole disk for HDFS
Hi Bob,
Does the hdfs-site.xml configuration file contain the property dfs.datanode.du.reserved? If this is defined, then the DataNode intentionally will not use this space for storage of replicas.
<property>
<name>dfs.datanode.du.reserved</name>
<value>0</value>
<description>Reserved space in bytes per volume. Always leave this much space free for non dfs use.
</description>
</property>
--Chris Nauroth
From: MBA <ad...@hotmail.com>>
Reply-To: "user@hadoop.apache.org<ma...@hadoop.apache.org>" <us...@hadoop.apache.org>>
Date: Tuesday, November 3, 2015 at 10:51 AM
To: "user@hadoop.apache.org<ma...@hadoop.apache.org>" <us...@hadoop.apache.org>>
Subject: hadoop not using whole disk for HDFS
I’ve got the Hortonworks distro running on a three node cluster. For some reason the disk available for HDFS is MUCH less than the total disk space. Both of my data nodes have 3TB hard drives. Only 100GB of that is being used for HDFS. Is it possible that I have a setting wrong somewhere?
B.
RE: hadoop not using whole disk for HDFS
Posted by "Naganarasimha G R (Naga)" <ga...@huawei.com>.
Hi Bob,
I am suspecting Ambari would not be allowing to create a folder directly under /home, might be it will allow /home/<user_name>/hdfs, since directories under /home is expected to be users home dir.
Regards,
+ Naga
________________________________
From: Naganarasimha G R (Naga) [garlanaganarasimha@huawei.com]
Sent: Friday, November 06, 2015 09:34
To: user@hadoop.apache.org
Subject: RE: hadoop not using whole disk for HDFS
Thanks Brahma, dint realize he might have configured both directories and i was assuming bob has configured single new directory "/hdfs/data".
So virtually its showing additional space,
manually try to add a data dir in /home, for your usecase, and restart datanodes.
Not sure about the impacs in Ambari but worth a try! , more permanent solution would be better remount
Filesystem Size Used Avail Use% Mounted on
/dev/mapper/centos-home 2.7T 33M 2.7T 1% /home
________________________________
From: Brahma Reddy Battula [brahmareddy.battula@huawei.com]
Sent: Friday, November 06, 2015 08:19
To: user@hadoop.apache.org
Subject: RE: hadoop not using whole disk for HDFS
For each configured dfs.datanode.data.dir , HDFS thinks its in separate partiotion and counts the capacity separately. So when another dir is added /hdfs/data, HDFS thinks new partition is added, So it increased the capacity 50GB per node. i.e. 100GB for 2 Nodes.
Not allowing /home directory to configure for data.dir might be ambari's constraint, instead you can manually try to add a data dir in /home, for your usecase, and restart datanodes.
Thanks & Regards
Brahma Reddy Battula
________________________________
From: Naganarasimha G R (Naga) [garlanaganarasimha@huawei.com]
Sent: Friday, November 06, 2015 7:20 AM
To: user@hadoop.apache.org
Subject: RE: hadoop not using whole disk for HDFS
Hi Bob,
1. I wasn’t able to set the config to /home/hdfs/data. I got an error that told me I’m not allowed to set that config to the /home directory. So I made it /hdfs/data.
Naga : I am not sure about the HDP Distro but if you make it point to /hdfs/data, still it will be pointing to the root mount itself i.e.
/dev/mapper/centos-root 50G 12G 39G 23% /
Other Alternative is to mount the drive to some other folder other than /home and then try.
2. When I restarted, the space available increased by a whopping 100GB.
Naga : I am particularly not sure how this happened may be you can again recheck if you enter the command "df -h <path of the NM data dir configured>" you will find out how much disk space is available on the related mount for which the path is configured.
Regards,
+ Naga
________________________________
From: Adaryl "Bob" Wakefield, MBA [adaryl.wakefield@hotmail.com]
Sent: Friday, November 06, 2015 06:54
To: user@hadoop.apache.org
Subject: Re: hadoop not using whole disk for HDFS
Is there a maximum amount of disk space that HDFS will use? Is 100GB that max? When we’re supposed to be dealing with “big data” why is the amount of data to be held on any one box such a small number when you’ve got terabytes available?
Adaryl "Bob" Wakefield, MBA
Principal
Mass Street Analytics, LLC
913.938.6685
www.linkedin.com/in/bobwakefieldmba
Twitter: @BobLovesData
From: Adaryl "Bob" Wakefield, MBA<ma...@hotmail.com>
Sent: Wednesday, November 04, 2015 4:38 PM
To: user@hadoop.apache.org<ma...@hadoop.apache.org>
Subject: Re: hadoop not using whole disk for HDFS
This is an experimental cluster and there isn’t anything I can’t lose. I ran into some issues. I’m running the Hortonworks distro and am managing things through Ambari.
1. I wasn’t able to set the config to /home/hdfs/data. I got an error that told me I’m not allowed to set that config to the /home directory. So I made it /hdfs/data.
2. When I restarted, the space available increased by a whopping 100GB.
Adaryl "Bob" Wakefield, MBA
Principal
Mass Street Analytics, LLC
913.938.6685
www.linkedin.com/in/bobwakefieldmba
Twitter: @BobLovesData
From: Naganarasimha G R (Naga)<ma...@huawei.com>
Sent: Wednesday, November 04, 2015 4:26 PM
To: user@hadoop.apache.org<ma...@hadoop.apache.org>
Subject: RE: hadoop not using whole disk for HDFS
Better would be to stop the daemons and copy the data from /hadoop/hdfs/data to /home/hdfs/data , reconfigure dfs.datanode.data.dir to /home/hdfs/data and then start the daemons. If the data is comparitively less !
Ensure you have the backup if have any critical data !
Regards,
+ Naga
________________________________
From: Adaryl "Bob" Wakefield, MBA [adaryl.wakefield@hotmail.com]
Sent: Thursday, November 05, 2015 03:40
To: user@hadoop.apache.org
Subject: Re: hadoop not using whole disk for HDFS
So like I can just create a new folder in the home directory like:
home/hdfs/data
and then set dfs.datanode.data.dir to:
/hadoop/hdfs/data,home/hdfs/data
Restart the node and that should do it correct?
Adaryl "Bob" Wakefield, MBA
Principal
Mass Street Analytics, LLC
913.938.6685
www.linkedin.com/in/bobwakefieldmba
Twitter: @BobLovesData
From: Naganarasimha G R (Naga)<ma...@huawei.com>
Sent: Wednesday, November 04, 2015 3:59 PM
To: user@hadoop.apache.org<ma...@hadoop.apache.org>
Subject: RE: hadoop not using whole disk for HDFS
Hi Bob,
Seems like you have configured to disk dir to be other than an folder in /home, if so try creating another folder and add to "dfs.datanode.data.dir" seperated by comma instead of trying to reset the default.
And its also advised not to use the root partition "/" to be configured for HDFS data dir, if the Dir usage hits the maximum then OS might fail to function properly.
Regards,
+ Naga
________________________________
From: P lva [ruvikal@gmail.com]
Sent: Thursday, November 05, 2015 03:11
To: user@hadoop.apache.org
Subject: Re: hadoop not using whole disk for HDFS
What does your dfs.datanode.data.dir point to ?
On Wed, Nov 4, 2015 at 4:14 PM, Adaryl "Bob" Wakefield, MBA <ad...@hotmail.com>> wrote:
Filesystem Size Used Avail Use% Mounted on
/dev/mapper/centos-root 50G 12G 39G 23% /
devtmpfs 16G 0 16G 0% /dev
tmpfs 16G 0 16G 0% /dev/shm
tmpfs 16G 1.4G 15G 9% /run
tmpfs 16G 0 16G 0% /sys/fs/cgroup
/dev/sda2 494M 123M 372M 25% /boot
/dev/mapper/centos-home 2.7T 33M 2.7T 1% /home
That’s from one datanode. The second one is nearly identical. I discovered that 50GB is actually a default. That seems really weird. Disk space is cheap. Why would you not just use most of the disk and why is it so hard to reset the default?
Adaryl "Bob" Wakefield, MBA
Principal
Mass Street Analytics, LLC
913.938.6685<tel:913.938.6685>
www.linkedin.com/in/bobwakefieldmba<http://www.linkedin.com/in/bobwakefieldmba>
Twitter: @BobLovesData
From: Chris Nauroth<ma...@hortonworks.com>
Sent: Wednesday, November 04, 2015 12:16 PM
To: user@hadoop.apache.org<ma...@hadoop.apache.org>
Subject: Re: hadoop not using whole disk for HDFS
How are those drives partitioned? Is it possible that the directories pointed to by the dfs.datanode.data.dir property in hdfs-site.xml reside on partitions that are sized to only 100 GB? Running commands like df would be a good way to check this at the OS level, independently of Hadoop.
--Chris Nauroth
From: MBA <ad...@hotmail.com>>
Reply-To: "user@hadoop.apache.org<ma...@hadoop.apache.org>" <us...@hadoop.apache.org>>
Date: Tuesday, November 3, 2015 at 11:16 AM
To: "user@hadoop.apache.org<ma...@hadoop.apache.org>" <us...@hadoop.apache.org>>
Subject: Re: hadoop not using whole disk for HDFS
Yeah. It has the current value of 1073741824 which is like 1.07 gig.
B.
From: Chris Nauroth<ma...@hortonworks.com>
Sent: Tuesday, November 03, 2015 11:57 AM
To: user@hadoop.apache.org<ma...@hadoop.apache.org>
Subject: Re: hadoop not using whole disk for HDFS
Hi Bob,
Does the hdfs-site.xml configuration file contain the property dfs.datanode.du.reserved? If this is defined, then the DataNode intentionally will not use this space for storage of replicas.
<property>
<name>dfs.datanode.du.reserved</name>
<value>0</value>
<description>Reserved space in bytes per volume. Always leave this much space free for non dfs use.
</description>
</property>
--Chris Nauroth
From: MBA <ad...@hotmail.com>>
Reply-To: "user@hadoop.apache.org<ma...@hadoop.apache.org>" <us...@hadoop.apache.org>>
Date: Tuesday, November 3, 2015 at 10:51 AM
To: "user@hadoop.apache.org<ma...@hadoop.apache.org>" <us...@hadoop.apache.org>>
Subject: hadoop not using whole disk for HDFS
I’ve got the Hortonworks distro running on a three node cluster. For some reason the disk available for HDFS is MUCH less than the total disk space. Both of my data nodes have 3TB hard drives. Only 100GB of that is being used for HDFS. Is it possible that I have a setting wrong somewhere?
B.
RE: hadoop not using whole disk for HDFS
Posted by "Naganarasimha G R (Naga)" <ga...@huawei.com>.
Hi Bob,
I am suspecting Ambari would not be allowing to create a folder directly under /home, might be it will allow /home/<user_name>/hdfs, since directories under /home is expected to be users home dir.
Regards,
+ Naga
________________________________
From: Naganarasimha G R (Naga) [garlanaganarasimha@huawei.com]
Sent: Friday, November 06, 2015 09:34
To: user@hadoop.apache.org
Subject: RE: hadoop not using whole disk for HDFS
Thanks Brahma, dint realize he might have configured both directories and i was assuming bob has configured single new directory "/hdfs/data".
So virtually its showing additional space,
manually try to add a data dir in /home, for your usecase, and restart datanodes.
Not sure about the impacs in Ambari but worth a try! , more permanent solution would be better remount
Filesystem Size Used Avail Use% Mounted on
/dev/mapper/centos-home 2.7T 33M 2.7T 1% /home
________________________________
From: Brahma Reddy Battula [brahmareddy.battula@huawei.com]
Sent: Friday, November 06, 2015 08:19
To: user@hadoop.apache.org
Subject: RE: hadoop not using whole disk for HDFS
For each configured dfs.datanode.data.dir , HDFS thinks its in separate partiotion and counts the capacity separately. So when another dir is added /hdfs/data, HDFS thinks new partition is added, So it increased the capacity 50GB per node. i.e. 100GB for 2 Nodes.
Not allowing /home directory to configure for data.dir might be ambari's constraint, instead you can manually try to add a data dir in /home, for your usecase, and restart datanodes.
Thanks & Regards
Brahma Reddy Battula
________________________________
From: Naganarasimha G R (Naga) [garlanaganarasimha@huawei.com]
Sent: Friday, November 06, 2015 7:20 AM
To: user@hadoop.apache.org
Subject: RE: hadoop not using whole disk for HDFS
Hi Bob,
1. I wasn’t able to set the config to /home/hdfs/data. I got an error that told me I’m not allowed to set that config to the /home directory. So I made it /hdfs/data.
Naga : I am not sure about the HDP Distro but if you make it point to /hdfs/data, still it will be pointing to the root mount itself i.e.
/dev/mapper/centos-root 50G 12G 39G 23% /
Other Alternative is to mount the drive to some other folder other than /home and then try.
2. When I restarted, the space available increased by a whopping 100GB.
Naga : I am particularly not sure how this happened may be you can again recheck if you enter the command "df -h <path of the NM data dir configured>" you will find out how much disk space is available on the related mount for which the path is configured.
Regards,
+ Naga
________________________________
From: Adaryl "Bob" Wakefield, MBA [adaryl.wakefield@hotmail.com]
Sent: Friday, November 06, 2015 06:54
To: user@hadoop.apache.org
Subject: Re: hadoop not using whole disk for HDFS
Is there a maximum amount of disk space that HDFS will use? Is 100GB that max? When we’re supposed to be dealing with “big data” why is the amount of data to be held on any one box such a small number when you’ve got terabytes available?
Adaryl "Bob" Wakefield, MBA
Principal
Mass Street Analytics, LLC
913.938.6685
www.linkedin.com/in/bobwakefieldmba
Twitter: @BobLovesData
From: Adaryl "Bob" Wakefield, MBA<ma...@hotmail.com>
Sent: Wednesday, November 04, 2015 4:38 PM
To: user@hadoop.apache.org<ma...@hadoop.apache.org>
Subject: Re: hadoop not using whole disk for HDFS
This is an experimental cluster and there isn’t anything I can’t lose. I ran into some issues. I’m running the Hortonworks distro and am managing things through Ambari.
1. I wasn’t able to set the config to /home/hdfs/data. I got an error that told me I’m not allowed to set that config to the /home directory. So I made it /hdfs/data.
2. When I restarted, the space available increased by a whopping 100GB.
Adaryl "Bob" Wakefield, MBA
Principal
Mass Street Analytics, LLC
913.938.6685
www.linkedin.com/in/bobwakefieldmba
Twitter: @BobLovesData
From: Naganarasimha G R (Naga)<ma...@huawei.com>
Sent: Wednesday, November 04, 2015 4:26 PM
To: user@hadoop.apache.org<ma...@hadoop.apache.org>
Subject: RE: hadoop not using whole disk for HDFS
Better would be to stop the daemons and copy the data from /hadoop/hdfs/data to /home/hdfs/data , reconfigure dfs.datanode.data.dir to /home/hdfs/data and then start the daemons. If the data is comparitively less !
Ensure you have the backup if have any critical data !
Regards,
+ Naga
________________________________
From: Adaryl "Bob" Wakefield, MBA [adaryl.wakefield@hotmail.com]
Sent: Thursday, November 05, 2015 03:40
To: user@hadoop.apache.org
Subject: Re: hadoop not using whole disk for HDFS
So like I can just create a new folder in the home directory like:
home/hdfs/data
and then set dfs.datanode.data.dir to:
/hadoop/hdfs/data,home/hdfs/data
Restart the node and that should do it correct?
Adaryl "Bob" Wakefield, MBA
Principal
Mass Street Analytics, LLC
913.938.6685
www.linkedin.com/in/bobwakefieldmba
Twitter: @BobLovesData
From: Naganarasimha G R (Naga)<ma...@huawei.com>
Sent: Wednesday, November 04, 2015 3:59 PM
To: user@hadoop.apache.org<ma...@hadoop.apache.org>
Subject: RE: hadoop not using whole disk for HDFS
Hi Bob,
Seems like you have configured to disk dir to be other than an folder in /home, if so try creating another folder and add to "dfs.datanode.data.dir" seperated by comma instead of trying to reset the default.
And its also advised not to use the root partition "/" to be configured for HDFS data dir, if the Dir usage hits the maximum then OS might fail to function properly.
Regards,
+ Naga
________________________________
From: P lva [ruvikal@gmail.com]
Sent: Thursday, November 05, 2015 03:11
To: user@hadoop.apache.org
Subject: Re: hadoop not using whole disk for HDFS
What does your dfs.datanode.data.dir point to ?
On Wed, Nov 4, 2015 at 4:14 PM, Adaryl "Bob" Wakefield, MBA <ad...@hotmail.com>> wrote:
Filesystem Size Used Avail Use% Mounted on
/dev/mapper/centos-root 50G 12G 39G 23% /
devtmpfs 16G 0 16G 0% /dev
tmpfs 16G 0 16G 0% /dev/shm
tmpfs 16G 1.4G 15G 9% /run
tmpfs 16G 0 16G 0% /sys/fs/cgroup
/dev/sda2 494M 123M 372M 25% /boot
/dev/mapper/centos-home 2.7T 33M 2.7T 1% /home
That’s from one datanode. The second one is nearly identical. I discovered that 50GB is actually a default. That seems really weird. Disk space is cheap. Why would you not just use most of the disk and why is it so hard to reset the default?
Adaryl "Bob" Wakefield, MBA
Principal
Mass Street Analytics, LLC
913.938.6685<tel:913.938.6685>
www.linkedin.com/in/bobwakefieldmba<http://www.linkedin.com/in/bobwakefieldmba>
Twitter: @BobLovesData
From: Chris Nauroth<ma...@hortonworks.com>
Sent: Wednesday, November 04, 2015 12:16 PM
To: user@hadoop.apache.org<ma...@hadoop.apache.org>
Subject: Re: hadoop not using whole disk for HDFS
How are those drives partitioned? Is it possible that the directories pointed to by the dfs.datanode.data.dir property in hdfs-site.xml reside on partitions that are sized to only 100 GB? Running commands like df would be a good way to check this at the OS level, independently of Hadoop.
--Chris Nauroth
From: MBA <ad...@hotmail.com>>
Reply-To: "user@hadoop.apache.org<ma...@hadoop.apache.org>" <us...@hadoop.apache.org>>
Date: Tuesday, November 3, 2015 at 11:16 AM
To: "user@hadoop.apache.org<ma...@hadoop.apache.org>" <us...@hadoop.apache.org>>
Subject: Re: hadoop not using whole disk for HDFS
Yeah. It has the current value of 1073741824 which is like 1.07 gig.
B.
From: Chris Nauroth<ma...@hortonworks.com>
Sent: Tuesday, November 03, 2015 11:57 AM
To: user@hadoop.apache.org<ma...@hadoop.apache.org>
Subject: Re: hadoop not using whole disk for HDFS
Hi Bob,
Does the hdfs-site.xml configuration file contain the property dfs.datanode.du.reserved? If this is defined, then the DataNode intentionally will not use this space for storage of replicas.
<property>
<name>dfs.datanode.du.reserved</name>
<value>0</value>
<description>Reserved space in bytes per volume. Always leave this much space free for non dfs use.
</description>
</property>
--Chris Nauroth
From: MBA <ad...@hotmail.com>>
Reply-To: "user@hadoop.apache.org<ma...@hadoop.apache.org>" <us...@hadoop.apache.org>>
Date: Tuesday, November 3, 2015 at 10:51 AM
To: "user@hadoop.apache.org<ma...@hadoop.apache.org>" <us...@hadoop.apache.org>>
Subject: hadoop not using whole disk for HDFS
I’ve got the Hortonworks distro running on a three node cluster. For some reason the disk available for HDFS is MUCH less than the total disk space. Both of my data nodes have 3TB hard drives. Only 100GB of that is being used for HDFS. Is it possible that I have a setting wrong somewhere?
B.
Re: hadoop not using whole disk for HDFS
Posted by "Adaryl \"Bob\" Wakefield, MBA" <ad...@hotmail.com>.
So when you say remount, what exactly am I remounting? /dev/mapper/centos-home?
Adaryl "Bob" Wakefield, MBA
Principal
Mass Street Analytics, LLC
913.938.6685
www.linkedin.com/in/bobwakefieldmba
Twitter: @BobLovesData
From: Naganarasimha G R (Naga)
Sent: Thursday, November 05, 2015 10:04 PM
To: user@hadoop.apache.org
Subject: RE: hadoop not using whole disk for HDFS
Thanks Brahma, dint realize he might have configured both directories and i was assuming bob has configured single new directory "/hdfs/data".
So virtually its showing additional space,
manually try to add a data dir in /home, for your usecase, and restart datanodes.
Not sure about the impacs in Ambari but worth a try! , more permanent solution would be better remount
Filesystem Size Used Avail Use% Mounted on
/dev/mapper/centos-home 2.7T 33M 2.7T 1% /home
--------------------------------------------------------------------------------
From: Brahma Reddy Battula [brahmareddy.battula@huawei.com]
Sent: Friday, November 06, 2015 08:19
To: user@hadoop.apache.org
Subject: RE: hadoop not using whole disk for HDFS
For each configured dfs.datanode.data.dir , HDFS thinks its in separate partiotion and counts the capacity separately. So when another dir is added /hdfs/data, HDFS thinks new partition is added, So it increased the capacity 50GB per node. i.e. 100GB for 2 Nodes.
Not allowing /home directory to configure for data.dir might be ambari's constraint, instead you can manually try to add a data dir in /home, for your usecase, and restart datanodes.
Thanks & Regards
Brahma Reddy Battula
--------------------------------------------------------------------------------
From: Naganarasimha G R (Naga) [garlanaganarasimha@huawei.com]
Sent: Friday, November 06, 2015 7:20 AM
To: user@hadoop.apache.org
Subject: RE: hadoop not using whole disk for HDFS
Hi Bob,
1. I wasn’t able to set the config to /home/hdfs/data. I got an error that told me I’m not allowed to set that config to the /home directory. So I made it /hdfs/data.
Naga : I am not sure about the HDP Distro but if you make it point to /hdfs/data, still it will be pointing to the root mount itself i.e.
/dev/mapper/centos-root 50G 12G 39G 23% /
Other Alternative is to mount the drive to some other folder other than /home and then try.
2. When I restarted, the space available increased by a whopping 100GB.
Naga : I am particularly not sure how this happened may be you can again recheck if you enter the command "df -h <path of the NM data dir configured>" you will find out how much disk space is available on the related mount for which the path is configured.
Regards,
+ Naga
--------------------------------------------------------------------------------
From: Adaryl "Bob" Wakefield, MBA [adaryl.wakefield@hotmail.com]
Sent: Friday, November 06, 2015 06:54
To: user@hadoop.apache.org
Subject: Re: hadoop not using whole disk for HDFS
Is there a maximum amount of disk space that HDFS will use? Is 100GB that max? When we’re supposed to be dealing with “big data” why is the amount of data to be held on any one box such a small number when you’ve got terabytes available?
Adaryl "Bob" Wakefield, MBA
Principal
Mass Street Analytics, LLC
913.938.6685
www.linkedin.com/in/bobwakefieldmba
Twitter: @BobLovesData
From: Adaryl "Bob" Wakefield, MBA
Sent: Wednesday, November 04, 2015 4:38 PM
To: user@hadoop.apache.org
Subject: Re: hadoop not using whole disk for HDFS
This is an experimental cluster and there isn’t anything I can’t lose. I ran into some issues. I’m running the Hortonworks distro and am managing things through Ambari.
1. I wasn’t able to set the config to /home/hdfs/data. I got an error that told me I’m not allowed to set that config to the /home directory. So I made it /hdfs/data.
2. When I restarted, the space available increased by a whopping 100GB.
Adaryl "Bob" Wakefield, MBA
Principal
Mass Street Analytics, LLC
913.938.6685
www.linkedin.com/in/bobwakefieldmba
Twitter: @BobLovesData
From: Naganarasimha G R (Naga)
Sent: Wednesday, November 04, 2015 4:26 PM
To: user@hadoop.apache.org
Subject: RE: hadoop not using whole disk for HDFS
Better would be to stop the daemons and copy the data from /hadoop/hdfs/data to /home/hdfs/data , reconfigure dfs.datanode.data.dir to /home/hdfs/data and then start the daemons. If the data is comparitively less !
Ensure you have the backup if have any critical data !
Regards,
+ Naga
--------------------------------------------------------------------------------
From: Adaryl "Bob" Wakefield, MBA [adaryl.wakefield@hotmail.com]
Sent: Thursday, November 05, 2015 03:40
To: user@hadoop.apache.org
Subject: Re: hadoop not using whole disk for HDFS
So like I can just create a new folder in the home directory like:
home/hdfs/data
and then set dfs.datanode.data.dir to:
/hadoop/hdfs/data,home/hdfs/data
Restart the node and that should do it correct?
Adaryl "Bob" Wakefield, MBA
Principal
Mass Street Analytics, LLC
913.938.6685
www.linkedin.com/in/bobwakefieldmba
Twitter: @BobLovesData
From: Naganarasimha G R (Naga)
Sent: Wednesday, November 04, 2015 3:59 PM
To: user@hadoop.apache.org
Subject: RE: hadoop not using whole disk for HDFS
Hi Bob,
Seems like you have configured to disk dir to be other than an folder in /home, if so try creating another folder and add to "dfs.datanode.data.dir" seperated by comma instead of trying to reset the default.
And its also advised not to use the root partition "/" to be configured for HDFS data dir, if the Dir usage hits the maximum then OS might fail to function properly.
Regards,
+ Naga
--------------------------------------------------------------------------------
From: P lva [ruvikal@gmail.com]
Sent: Thursday, November 05, 2015 03:11
To: user@hadoop.apache.org
Subject: Re: hadoop not using whole disk for HDFS
What does your dfs.datanode.data.dir point to ?
On Wed, Nov 4, 2015 at 4:14 PM, Adaryl "Bob" Wakefield, MBA <ad...@hotmail.com> wrote:
Filesystem Size Used Avail Use% Mounted on
/dev/mapper/centos-root 50G 12G 39G 23% /
devtmpfs 16G 0 16G 0% /dev
tmpfs 16G 0 16G 0% /dev/shm
tmpfs 16G 1.4G 15G 9% /run
tmpfs 16G 0 16G 0% /sys/fs/cgroup
/dev/sda2 494M 123M 372M 25% /boot
/dev/mapper/centos-home 2.7T 33M 2.7T 1% /home
That’s from one datanode. The second one is nearly identical. I discovered that 50GB is actually a default. That seems really weird. Disk space is cheap. Why would you not just use most of the disk and why is it so hard to reset the default?
Adaryl "Bob" Wakefield, MBA
Principal
Mass Street Analytics, LLC
913.938.6685
www.linkedin.com/in/bobwakefieldmba
Twitter: @BobLovesData
From: Chris Nauroth
Sent: Wednesday, November 04, 2015 12:16 PM
To: user@hadoop.apache.org
Subject: Re: hadoop not using whole disk for HDFS
How are those drives partitioned? Is it possible that the directories pointed to by the dfs.datanode.data.dir property in hdfs-site.xml reside on partitions that are sized to only 100 GB? Running commands like df would be a good way to check this at the OS level, independently of Hadoop.
--Chris Nauroth
From: MBA <ad...@hotmail.com>
Reply-To: "user@hadoop.apache.org" <us...@hadoop.apache.org>
Date: Tuesday, November 3, 2015 at 11:16 AM
To: "user@hadoop.apache.org" <us...@hadoop.apache.org>
Subject: Re: hadoop not using whole disk for HDFS
Yeah. It has the current value of 1073741824 which is like 1.07 gig.
B.
From: Chris Nauroth
Sent: Tuesday, November 03, 2015 11:57 AM
To: user@hadoop.apache.org
Subject: Re: hadoop not using whole disk for HDFS
Hi Bob,
Does the hdfs-site.xml configuration file contain the property dfs.datanode.du.reserved? If this is defined, then the DataNode intentionally will not use this space for storage of replicas.
<property>
<name>dfs.datanode.du.reserved</name>
<value>0</value>
<description>Reserved space in bytes per volume. Always leave this much space free for non dfs use.
</description>
</property>
--Chris Nauroth
From: MBA <ad...@hotmail.com>
Reply-To: "user@hadoop.apache.org" <us...@hadoop.apache.org>
Date: Tuesday, November 3, 2015 at 10:51 AM
To: "user@hadoop.apache.org" <us...@hadoop.apache.org>
Subject: hadoop not using whole disk for HDFS
I’ve got the Hortonworks distro running on a three node cluster. For some reason the disk available for HDFS is MUCH less than the total disk space. Both of my data nodes have 3TB hard drives. Only 100GB of that is being used for HDFS. Is it possible that I have a setting wrong somewhere?
B.
Re: hadoop not using whole disk for HDFS
Posted by "Adaryl \"Bob\" Wakefield, MBA" <ad...@hotmail.com>.
So when you say remount, what exactly am I remounting? /dev/mapper/centos-home?
Adaryl "Bob" Wakefield, MBA
Principal
Mass Street Analytics, LLC
913.938.6685
www.linkedin.com/in/bobwakefieldmba
Twitter: @BobLovesData
From: Naganarasimha G R (Naga)
Sent: Thursday, November 05, 2015 10:04 PM
To: user@hadoop.apache.org
Subject: RE: hadoop not using whole disk for HDFS
Thanks Brahma, dint realize he might have configured both directories and i was assuming bob has configured single new directory "/hdfs/data".
So virtually its showing additional space,
manually try to add a data dir in /home, for your usecase, and restart datanodes.
Not sure about the impacs in Ambari but worth a try! , more permanent solution would be better remount
Filesystem Size Used Avail Use% Mounted on
/dev/mapper/centos-home 2.7T 33M 2.7T 1% /home
--------------------------------------------------------------------------------
From: Brahma Reddy Battula [brahmareddy.battula@huawei.com]
Sent: Friday, November 06, 2015 08:19
To: user@hadoop.apache.org
Subject: RE: hadoop not using whole disk for HDFS
For each configured dfs.datanode.data.dir , HDFS thinks its in separate partiotion and counts the capacity separately. So when another dir is added /hdfs/data, HDFS thinks new partition is added, So it increased the capacity 50GB per node. i.e. 100GB for 2 Nodes.
Not allowing /home directory to configure for data.dir might be ambari's constraint, instead you can manually try to add a data dir in /home, for your usecase, and restart datanodes.
Thanks & Regards
Brahma Reddy Battula
--------------------------------------------------------------------------------
From: Naganarasimha G R (Naga) [garlanaganarasimha@huawei.com]
Sent: Friday, November 06, 2015 7:20 AM
To: user@hadoop.apache.org
Subject: RE: hadoop not using whole disk for HDFS
Hi Bob,
1. I wasn’t able to set the config to /home/hdfs/data. I got an error that told me I’m not allowed to set that config to the /home directory. So I made it /hdfs/data.
Naga : I am not sure about the HDP Distro but if you make it point to /hdfs/data, still it will be pointing to the root mount itself i.e.
/dev/mapper/centos-root 50G 12G 39G 23% /
Other Alternative is to mount the drive to some other folder other than /home and then try.
2. When I restarted, the space available increased by a whopping 100GB.
Naga : I am particularly not sure how this happened may be you can again recheck if you enter the command "df -h <path of the NM data dir configured>" you will find out how much disk space is available on the related mount for which the path is configured.
Regards,
+ Naga
--------------------------------------------------------------------------------
From: Adaryl "Bob" Wakefield, MBA [adaryl.wakefield@hotmail.com]
Sent: Friday, November 06, 2015 06:54
To: user@hadoop.apache.org
Subject: Re: hadoop not using whole disk for HDFS
Is there a maximum amount of disk space that HDFS will use? Is 100GB that max? When we’re supposed to be dealing with “big data” why is the amount of data to be held on any one box such a small number when you’ve got terabytes available?
Adaryl "Bob" Wakefield, MBA
Principal
Mass Street Analytics, LLC
913.938.6685
www.linkedin.com/in/bobwakefieldmba
Twitter: @BobLovesData
From: Adaryl "Bob" Wakefield, MBA
Sent: Wednesday, November 04, 2015 4:38 PM
To: user@hadoop.apache.org
Subject: Re: hadoop not using whole disk for HDFS
This is an experimental cluster and there isn’t anything I can’t lose. I ran into some issues. I’m running the Hortonworks distro and am managing things through Ambari.
1. I wasn’t able to set the config to /home/hdfs/data. I got an error that told me I’m not allowed to set that config to the /home directory. So I made it /hdfs/data.
2. When I restarted, the space available increased by a whopping 100GB.
Adaryl "Bob" Wakefield, MBA
Principal
Mass Street Analytics, LLC
913.938.6685
www.linkedin.com/in/bobwakefieldmba
Twitter: @BobLovesData
From: Naganarasimha G R (Naga)
Sent: Wednesday, November 04, 2015 4:26 PM
To: user@hadoop.apache.org
Subject: RE: hadoop not using whole disk for HDFS
Better would be to stop the daemons and copy the data from /hadoop/hdfs/data to /home/hdfs/data , reconfigure dfs.datanode.data.dir to /home/hdfs/data and then start the daemons. If the data is comparitively less !
Ensure you have the backup if have any critical data !
Regards,
+ Naga
--------------------------------------------------------------------------------
From: Adaryl "Bob" Wakefield, MBA [adaryl.wakefield@hotmail.com]
Sent: Thursday, November 05, 2015 03:40
To: user@hadoop.apache.org
Subject: Re: hadoop not using whole disk for HDFS
So like I can just create a new folder in the home directory like:
home/hdfs/data
and then set dfs.datanode.data.dir to:
/hadoop/hdfs/data,home/hdfs/data
Restart the node and that should do it correct?
Adaryl "Bob" Wakefield, MBA
Principal
Mass Street Analytics, LLC
913.938.6685
www.linkedin.com/in/bobwakefieldmba
Twitter: @BobLovesData
From: Naganarasimha G R (Naga)
Sent: Wednesday, November 04, 2015 3:59 PM
To: user@hadoop.apache.org
Subject: RE: hadoop not using whole disk for HDFS
Hi Bob,
Seems like you have configured to disk dir to be other than an folder in /home, if so try creating another folder and add to "dfs.datanode.data.dir" seperated by comma instead of trying to reset the default.
And its also advised not to use the root partition "/" to be configured for HDFS data dir, if the Dir usage hits the maximum then OS might fail to function properly.
Regards,
+ Naga
--------------------------------------------------------------------------------
From: P lva [ruvikal@gmail.com]
Sent: Thursday, November 05, 2015 03:11
To: user@hadoop.apache.org
Subject: Re: hadoop not using whole disk for HDFS
What does your dfs.datanode.data.dir point to ?
On Wed, Nov 4, 2015 at 4:14 PM, Adaryl "Bob" Wakefield, MBA <ad...@hotmail.com> wrote:
Filesystem Size Used Avail Use% Mounted on
/dev/mapper/centos-root 50G 12G 39G 23% /
devtmpfs 16G 0 16G 0% /dev
tmpfs 16G 0 16G 0% /dev/shm
tmpfs 16G 1.4G 15G 9% /run
tmpfs 16G 0 16G 0% /sys/fs/cgroup
/dev/sda2 494M 123M 372M 25% /boot
/dev/mapper/centos-home 2.7T 33M 2.7T 1% /home
That’s from one datanode. The second one is nearly identical. I discovered that 50GB is actually a default. That seems really weird. Disk space is cheap. Why would you not just use most of the disk and why is it so hard to reset the default?
Adaryl "Bob" Wakefield, MBA
Principal
Mass Street Analytics, LLC
913.938.6685
www.linkedin.com/in/bobwakefieldmba
Twitter: @BobLovesData
From: Chris Nauroth
Sent: Wednesday, November 04, 2015 12:16 PM
To: user@hadoop.apache.org
Subject: Re: hadoop not using whole disk for HDFS
How are those drives partitioned? Is it possible that the directories pointed to by the dfs.datanode.data.dir property in hdfs-site.xml reside on partitions that are sized to only 100 GB? Running commands like df would be a good way to check this at the OS level, independently of Hadoop.
--Chris Nauroth
From: MBA <ad...@hotmail.com>
Reply-To: "user@hadoop.apache.org" <us...@hadoop.apache.org>
Date: Tuesday, November 3, 2015 at 11:16 AM
To: "user@hadoop.apache.org" <us...@hadoop.apache.org>
Subject: Re: hadoop not using whole disk for HDFS
Yeah. It has the current value of 1073741824 which is like 1.07 gig.
B.
From: Chris Nauroth
Sent: Tuesday, November 03, 2015 11:57 AM
To: user@hadoop.apache.org
Subject: Re: hadoop not using whole disk for HDFS
Hi Bob,
Does the hdfs-site.xml configuration file contain the property dfs.datanode.du.reserved? If this is defined, then the DataNode intentionally will not use this space for storage of replicas.
<property>
<name>dfs.datanode.du.reserved</name>
<value>0</value>
<description>Reserved space in bytes per volume. Always leave this much space free for non dfs use.
</description>
</property>
--Chris Nauroth
From: MBA <ad...@hotmail.com>
Reply-To: "user@hadoop.apache.org" <us...@hadoop.apache.org>
Date: Tuesday, November 3, 2015 at 10:51 AM
To: "user@hadoop.apache.org" <us...@hadoop.apache.org>
Subject: hadoop not using whole disk for HDFS
I’ve got the Hortonworks distro running on a three node cluster. For some reason the disk available for HDFS is MUCH less than the total disk space. Both of my data nodes have 3TB hard drives. Only 100GB of that is being used for HDFS. Is it possible that I have a setting wrong somewhere?
B.
Re: hadoop not using whole disk for HDFS
Posted by "Adaryl \"Bob\" Wakefield, MBA" <ad...@hotmail.com>.
So when you say remount, what exactly am I remounting? /dev/mapper/centos-home?
Adaryl "Bob" Wakefield, MBA
Principal
Mass Street Analytics, LLC
913.938.6685
www.linkedin.com/in/bobwakefieldmba
Twitter: @BobLovesData
From: Naganarasimha G R (Naga)
Sent: Thursday, November 05, 2015 10:04 PM
To: user@hadoop.apache.org
Subject: RE: hadoop not using whole disk for HDFS
Thanks Brahma, dint realize he might have configured both directories and i was assuming bob has configured single new directory "/hdfs/data".
So virtually its showing additional space,
manually try to add a data dir in /home, for your usecase, and restart datanodes.
Not sure about the impacs in Ambari but worth a try! , more permanent solution would be better remount
Filesystem Size Used Avail Use% Mounted on
/dev/mapper/centos-home 2.7T 33M 2.7T 1% /home
--------------------------------------------------------------------------------
From: Brahma Reddy Battula [brahmareddy.battula@huawei.com]
Sent: Friday, November 06, 2015 08:19
To: user@hadoop.apache.org
Subject: RE: hadoop not using whole disk for HDFS
For each configured dfs.datanode.data.dir , HDFS thinks its in separate partiotion and counts the capacity separately. So when another dir is added /hdfs/data, HDFS thinks new partition is added, So it increased the capacity 50GB per node. i.e. 100GB for 2 Nodes.
Not allowing /home directory to configure for data.dir might be ambari's constraint, instead you can manually try to add a data dir in /home, for your usecase, and restart datanodes.
Thanks & Regards
Brahma Reddy Battula
--------------------------------------------------------------------------------
From: Naganarasimha G R (Naga) [garlanaganarasimha@huawei.com]
Sent: Friday, November 06, 2015 7:20 AM
To: user@hadoop.apache.org
Subject: RE: hadoop not using whole disk for HDFS
Hi Bob,
1. I wasn’t able to set the config to /home/hdfs/data. I got an error that told me I’m not allowed to set that config to the /home directory. So I made it /hdfs/data.
Naga : I am not sure about the HDP Distro but if you make it point to /hdfs/data, still it will be pointing to the root mount itself i.e.
/dev/mapper/centos-root 50G 12G 39G 23% /
Other Alternative is to mount the drive to some other folder other than /home and then try.
2. When I restarted, the space available increased by a whopping 100GB.
Naga : I am particularly not sure how this happened may be you can again recheck if you enter the command "df -h <path of the NM data dir configured>" you will find out how much disk space is available on the related mount for which the path is configured.
Regards,
+ Naga
--------------------------------------------------------------------------------
From: Adaryl "Bob" Wakefield, MBA [adaryl.wakefield@hotmail.com]
Sent: Friday, November 06, 2015 06:54
To: user@hadoop.apache.org
Subject: Re: hadoop not using whole disk for HDFS
Is there a maximum amount of disk space that HDFS will use? Is 100GB that max? When we’re supposed to be dealing with “big data” why is the amount of data to be held on any one box such a small number when you’ve got terabytes available?
Adaryl "Bob" Wakefield, MBA
Principal
Mass Street Analytics, LLC
913.938.6685
www.linkedin.com/in/bobwakefieldmba
Twitter: @BobLovesData
From: Adaryl "Bob" Wakefield, MBA
Sent: Wednesday, November 04, 2015 4:38 PM
To: user@hadoop.apache.org
Subject: Re: hadoop not using whole disk for HDFS
This is an experimental cluster and there isn’t anything I can’t lose. I ran into some issues. I’m running the Hortonworks distro and am managing things through Ambari.
1. I wasn’t able to set the config to /home/hdfs/data. I got an error that told me I’m not allowed to set that config to the /home directory. So I made it /hdfs/data.
2. When I restarted, the space available increased by a whopping 100GB.
Adaryl "Bob" Wakefield, MBA
Principal
Mass Street Analytics, LLC
913.938.6685
www.linkedin.com/in/bobwakefieldmba
Twitter: @BobLovesData
From: Naganarasimha G R (Naga)
Sent: Wednesday, November 04, 2015 4:26 PM
To: user@hadoop.apache.org
Subject: RE: hadoop not using whole disk for HDFS
Better would be to stop the daemons and copy the data from /hadoop/hdfs/data to /home/hdfs/data , reconfigure dfs.datanode.data.dir to /home/hdfs/data and then start the daemons. If the data is comparitively less !
Ensure you have the backup if have any critical data !
Regards,
+ Naga
--------------------------------------------------------------------------------
From: Adaryl "Bob" Wakefield, MBA [adaryl.wakefield@hotmail.com]
Sent: Thursday, November 05, 2015 03:40
To: user@hadoop.apache.org
Subject: Re: hadoop not using whole disk for HDFS
So like I can just create a new folder in the home directory like:
home/hdfs/data
and then set dfs.datanode.data.dir to:
/hadoop/hdfs/data,home/hdfs/data
Restart the node and that should do it correct?
Adaryl "Bob" Wakefield, MBA
Principal
Mass Street Analytics, LLC
913.938.6685
www.linkedin.com/in/bobwakefieldmba
Twitter: @BobLovesData
From: Naganarasimha G R (Naga)
Sent: Wednesday, November 04, 2015 3:59 PM
To: user@hadoop.apache.org
Subject: RE: hadoop not using whole disk for HDFS
Hi Bob,
Seems like you have configured to disk dir to be other than an folder in /home, if so try creating another folder and add to "dfs.datanode.data.dir" seperated by comma instead of trying to reset the default.
And its also advised not to use the root partition "/" to be configured for HDFS data dir, if the Dir usage hits the maximum then OS might fail to function properly.
Regards,
+ Naga
--------------------------------------------------------------------------------
From: P lva [ruvikal@gmail.com]
Sent: Thursday, November 05, 2015 03:11
To: user@hadoop.apache.org
Subject: Re: hadoop not using whole disk for HDFS
What does your dfs.datanode.data.dir point to ?
On Wed, Nov 4, 2015 at 4:14 PM, Adaryl "Bob" Wakefield, MBA <ad...@hotmail.com> wrote:
Filesystem Size Used Avail Use% Mounted on
/dev/mapper/centos-root 50G 12G 39G 23% /
devtmpfs 16G 0 16G 0% /dev
tmpfs 16G 0 16G 0% /dev/shm
tmpfs 16G 1.4G 15G 9% /run
tmpfs 16G 0 16G 0% /sys/fs/cgroup
/dev/sda2 494M 123M 372M 25% /boot
/dev/mapper/centos-home 2.7T 33M 2.7T 1% /home
That’s from one datanode. The second one is nearly identical. I discovered that 50GB is actually a default. That seems really weird. Disk space is cheap. Why would you not just use most of the disk and why is it so hard to reset the default?
Adaryl "Bob" Wakefield, MBA
Principal
Mass Street Analytics, LLC
913.938.6685
www.linkedin.com/in/bobwakefieldmba
Twitter: @BobLovesData
From: Chris Nauroth
Sent: Wednesday, November 04, 2015 12:16 PM
To: user@hadoop.apache.org
Subject: Re: hadoop not using whole disk for HDFS
How are those drives partitioned? Is it possible that the directories pointed to by the dfs.datanode.data.dir property in hdfs-site.xml reside on partitions that are sized to only 100 GB? Running commands like df would be a good way to check this at the OS level, independently of Hadoop.
--Chris Nauroth
From: MBA <ad...@hotmail.com>
Reply-To: "user@hadoop.apache.org" <us...@hadoop.apache.org>
Date: Tuesday, November 3, 2015 at 11:16 AM
To: "user@hadoop.apache.org" <us...@hadoop.apache.org>
Subject: Re: hadoop not using whole disk for HDFS
Yeah. It has the current value of 1073741824 which is like 1.07 gig.
B.
From: Chris Nauroth
Sent: Tuesday, November 03, 2015 11:57 AM
To: user@hadoop.apache.org
Subject: Re: hadoop not using whole disk for HDFS
Hi Bob,
Does the hdfs-site.xml configuration file contain the property dfs.datanode.du.reserved? If this is defined, then the DataNode intentionally will not use this space for storage of replicas.
<property>
<name>dfs.datanode.du.reserved</name>
<value>0</value>
<description>Reserved space in bytes per volume. Always leave this much space free for non dfs use.
</description>
</property>
--Chris Nauroth
From: MBA <ad...@hotmail.com>
Reply-To: "user@hadoop.apache.org" <us...@hadoop.apache.org>
Date: Tuesday, November 3, 2015 at 10:51 AM
To: "user@hadoop.apache.org" <us...@hadoop.apache.org>
Subject: hadoop not using whole disk for HDFS
I’ve got the Hortonworks distro running on a three node cluster. For some reason the disk available for HDFS is MUCH less than the total disk space. Both of my data nodes have 3TB hard drives. Only 100GB of that is being used for HDFS. Is it possible that I have a setting wrong somewhere?
B.
RE: hadoop not using whole disk for HDFS
Posted by "Naganarasimha G R (Naga)" <ga...@huawei.com>.
Thanks Brahma, dint realize he might have configured both directories and i was assuming bob has configured single new directory "/hdfs/data".
So virtually its showing additional space,
manually try to add a data dir in /home, for your usecase, and restart datanodes.
Not sure about the impacs in Ambari but worth a try! , more permanent solution would be better remount
Filesystem Size Used Avail Use% Mounted on
/dev/mapper/centos-home 2.7T 33M 2.7T 1% /home
________________________________
From: Brahma Reddy Battula [brahmareddy.battula@huawei.com]
Sent: Friday, November 06, 2015 08:19
To: user@hadoop.apache.org
Subject: RE: hadoop not using whole disk for HDFS
For each configured dfs.datanode.data.dir , HDFS thinks its in separate partiotion and counts the capacity separately. So when another dir is added /hdfs/data, HDFS thinks new partition is added, So it increased the capacity 50GB per node. i.e. 100GB for 2 Nodes.
Not allowing /home directory to configure for data.dir might be ambari's constraint, instead you can manually try to add a data dir in /home, for your usecase, and restart datanodes.
Thanks & Regards
Brahma Reddy Battula
________________________________
From: Naganarasimha G R (Naga) [garlanaganarasimha@huawei.com]
Sent: Friday, November 06, 2015 7:20 AM
To: user@hadoop.apache.org
Subject: RE: hadoop not using whole disk for HDFS
Hi Bob,
1. I wasn’t able to set the config to /home/hdfs/data. I got an error that told me I’m not allowed to set that config to the /home directory. So I made it /hdfs/data.
Naga : I am not sure about the HDP Distro but if you make it point to /hdfs/data, still it will be pointing to the root mount itself i.e.
/dev/mapper/centos-root 50G 12G 39G 23% /
Other Alternative is to mount the drive to some other folder other than /home and then try.
2. When I restarted, the space available increased by a whopping 100GB.
Naga : I am particularly not sure how this happened may be you can again recheck if you enter the command "df -h <path of the NM data dir configured>" you will find out how much disk space is available on the related mount for which the path is configured.
Regards,
+ Naga
________________________________
From: Adaryl "Bob" Wakefield, MBA [adaryl.wakefield@hotmail.com]
Sent: Friday, November 06, 2015 06:54
To: user@hadoop.apache.org
Subject: Re: hadoop not using whole disk for HDFS
Is there a maximum amount of disk space that HDFS will use? Is 100GB that max? When we’re supposed to be dealing with “big data” why is the amount of data to be held on any one box such a small number when you’ve got terabytes available?
Adaryl "Bob" Wakefield, MBA
Principal
Mass Street Analytics, LLC
913.938.6685
www.linkedin.com/in/bobwakefieldmba
Twitter: @BobLovesData
From: Adaryl "Bob" Wakefield, MBA<ma...@hotmail.com>
Sent: Wednesday, November 04, 2015 4:38 PM
To: user@hadoop.apache.org<ma...@hadoop.apache.org>
Subject: Re: hadoop not using whole disk for HDFS
This is an experimental cluster and there isn’t anything I can’t lose. I ran into some issues. I’m running the Hortonworks distro and am managing things through Ambari.
1. I wasn’t able to set the config to /home/hdfs/data. I got an error that told me I’m not allowed to set that config to the /home directory. So I made it /hdfs/data.
2. When I restarted, the space available increased by a whopping 100GB.
Adaryl "Bob" Wakefield, MBA
Principal
Mass Street Analytics, LLC
913.938.6685
www.linkedin.com/in/bobwakefieldmba
Twitter: @BobLovesData
From: Naganarasimha G R (Naga)<ma...@huawei.com>
Sent: Wednesday, November 04, 2015 4:26 PM
To: user@hadoop.apache.org<ma...@hadoop.apache.org>
Subject: RE: hadoop not using whole disk for HDFS
Better would be to stop the daemons and copy the data from /hadoop/hdfs/data to /home/hdfs/data , reconfigure dfs.datanode.data.dir to /home/hdfs/data and then start the daemons. If the data is comparitively less !
Ensure you have the backup if have any critical data !
Regards,
+ Naga
________________________________
From: Adaryl "Bob" Wakefield, MBA [adaryl.wakefield@hotmail.com]
Sent: Thursday, November 05, 2015 03:40
To: user@hadoop.apache.org
Subject: Re: hadoop not using whole disk for HDFS
So like I can just create a new folder in the home directory like:
home/hdfs/data
and then set dfs.datanode.data.dir to:
/hadoop/hdfs/data,home/hdfs/data
Restart the node and that should do it correct?
Adaryl "Bob" Wakefield, MBA
Principal
Mass Street Analytics, LLC
913.938.6685
www.linkedin.com/in/bobwakefieldmba
Twitter: @BobLovesData
From: Naganarasimha G R (Naga)<ma...@huawei.com>
Sent: Wednesday, November 04, 2015 3:59 PM
To: user@hadoop.apache.org<ma...@hadoop.apache.org>
Subject: RE: hadoop not using whole disk for HDFS
Hi Bob,
Seems like you have configured to disk dir to be other than an folder in /home, if so try creating another folder and add to "dfs.datanode.data.dir" seperated by comma instead of trying to reset the default.
And its also advised not to use the root partition "/" to be configured for HDFS data dir, if the Dir usage hits the maximum then OS might fail to function properly.
Regards,
+ Naga
________________________________
From: P lva [ruvikal@gmail.com]
Sent: Thursday, November 05, 2015 03:11
To: user@hadoop.apache.org
Subject: Re: hadoop not using whole disk for HDFS
What does your dfs.datanode.data.dir point to ?
On Wed, Nov 4, 2015 at 4:14 PM, Adaryl "Bob" Wakefield, MBA <ad...@hotmail.com>> wrote:
Filesystem Size Used Avail Use% Mounted on
/dev/mapper/centos-root 50G 12G 39G 23% /
devtmpfs 16G 0 16G 0% /dev
tmpfs 16G 0 16G 0% /dev/shm
tmpfs 16G 1.4G 15G 9% /run
tmpfs 16G 0 16G 0% /sys/fs/cgroup
/dev/sda2 494M 123M 372M 25% /boot
/dev/mapper/centos-home 2.7T 33M 2.7T 1% /home
That’s from one datanode. The second one is nearly identical. I discovered that 50GB is actually a default. That seems really weird. Disk space is cheap. Why would you not just use most of the disk and why is it so hard to reset the default?
Adaryl "Bob" Wakefield, MBA
Principal
Mass Street Analytics, LLC
913.938.6685<tel:913.938.6685>
www.linkedin.com/in/bobwakefieldmba<http://www.linkedin.com/in/bobwakefieldmba>
Twitter: @BobLovesData
From: Chris Nauroth<ma...@hortonworks.com>
Sent: Wednesday, November 04, 2015 12:16 PM
To: user@hadoop.apache.org<ma...@hadoop.apache.org>
Subject: Re: hadoop not using whole disk for HDFS
How are those drives partitioned? Is it possible that the directories pointed to by the dfs.datanode.data.dir property in hdfs-site.xml reside on partitions that are sized to only 100 GB? Running commands like df would be a good way to check this at the OS level, independently of Hadoop.
--Chris Nauroth
From: MBA <ad...@hotmail.com>>
Reply-To: "user@hadoop.apache.org<ma...@hadoop.apache.org>" <us...@hadoop.apache.org>>
Date: Tuesday, November 3, 2015 at 11:16 AM
To: "user@hadoop.apache.org<ma...@hadoop.apache.org>" <us...@hadoop.apache.org>>
Subject: Re: hadoop not using whole disk for HDFS
Yeah. It has the current value of 1073741824 which is like 1.07 gig.
B.
From: Chris Nauroth<ma...@hortonworks.com>
Sent: Tuesday, November 03, 2015 11:57 AM
To: user@hadoop.apache.org<ma...@hadoop.apache.org>
Subject: Re: hadoop not using whole disk for HDFS
Hi Bob,
Does the hdfs-site.xml configuration file contain the property dfs.datanode.du.reserved? If this is defined, then the DataNode intentionally will not use this space for storage of replicas.
<property>
<name>dfs.datanode.du.reserved</name>
<value>0</value>
<description>Reserved space in bytes per volume. Always leave this much space free for non dfs use.
</description>
</property>
--Chris Nauroth
From: MBA <ad...@hotmail.com>>
Reply-To: "user@hadoop.apache.org<ma...@hadoop.apache.org>" <us...@hadoop.apache.org>>
Date: Tuesday, November 3, 2015 at 10:51 AM
To: "user@hadoop.apache.org<ma...@hadoop.apache.org>" <us...@hadoop.apache.org>>
Subject: hadoop not using whole disk for HDFS
I’ve got the Hortonworks distro running on a three node cluster. For some reason the disk available for HDFS is MUCH less than the total disk space. Both of my data nodes have 3TB hard drives. Only 100GB of that is being used for HDFS. Is it possible that I have a setting wrong somewhere?
B.
Re: hadoop not using whole disk for HDFS
Posted by "Adaryl \"Bob\" Wakefield, MBA" <ad...@hotmail.com>.
By manually you mean actually going in with nano and editing the config file? I could do that but if Ambari won’t let you do it through the interface, isn’t it possible that trying to add the directory in home might break something?
Adaryl "Bob" Wakefield, MBA
Principal
Mass Street Analytics, LLC
913.938.6685
www.linkedin.com/in/bobwakefieldmba
Twitter: @BobLovesData
From: Brahma Reddy Battula
Sent: Thursday, November 05, 2015 8:49 PM
To: user@hadoop.apache.org
Subject: RE: hadoop not using whole disk for HDFS
For each configured dfs.datanode.data.dir , HDFS thinks its in separate partiotion and counts the capacity separately. So when another dir is added /hdfs/data, HDFS thinks new partition is added, So it increased the capacity 50GB per node. i.e. 100GB for 2 Nodes.
Not allowing /home directory to configure for data.dir might be ambari's constraint, instead you can manually try to add a data dir in /home, for your usecase, and restart datanodes.
Thanks & Regards
Brahma Reddy Battula
--------------------------------------------------------------------------------
From: Naganarasimha G R (Naga) [garlanaganarasimha@huawei.com]
Sent: Friday, November 06, 2015 7:20 AM
To: user@hadoop.apache.org
Subject: RE: hadoop not using whole disk for HDFS
Hi Bob,
1. I wasn’t able to set the config to /home/hdfs/data. I got an error that told me I’m not allowed to set that config to the /home directory. So I made it /hdfs/data.
Naga : I am not sure about the HDP Distro but if you make it point to /hdfs/data, still it will be pointing to the root mount itself i.e.
/dev/mapper/centos-root 50G 12G 39G 23% /
Other Alternative is to mount the drive to some other folder other than /home and then try.
2. When I restarted, the space available increased by a whopping 100GB.
Naga : I am particularly not sure how this happened may be you can again recheck if you enter the command "df -h <path of the NM data dir configured>" you will find out how much disk space is available on the related mount for which the path is configured.
Regards,
+ Naga
--------------------------------------------------------------------------------
From: Adaryl "Bob" Wakefield, MBA [adaryl.wakefield@hotmail.com]
Sent: Friday, November 06, 2015 06:54
To: user@hadoop.apache.org
Subject: Re: hadoop not using whole disk for HDFS
Is there a maximum amount of disk space that HDFS will use? Is 100GB that max? When we’re supposed to be dealing with “big data” why is the amount of data to be held on any one box such a small number when you’ve got terabytes available?
Adaryl "Bob" Wakefield, MBA
Principal
Mass Street Analytics, LLC
913.938.6685
www.linkedin.com/in/bobwakefieldmba
Twitter: @BobLovesData
From: Adaryl "Bob" Wakefield, MBA
Sent: Wednesday, November 04, 2015 4:38 PM
To: user@hadoop.apache.org
Subject: Re: hadoop not using whole disk for HDFS
This is an experimental cluster and there isn’t anything I can’t lose. I ran into some issues. I’m running the Hortonworks distro and am managing things through Ambari.
1. I wasn’t able to set the config to /home/hdfs/data. I got an error that told me I’m not allowed to set that config to the /home directory. So I made it /hdfs/data.
2. When I restarted, the space available increased by a whopping 100GB.
Adaryl "Bob" Wakefield, MBA
Principal
Mass Street Analytics, LLC
913.938.6685
www.linkedin.com/in/bobwakefieldmba
Twitter: @BobLovesData
From: Naganarasimha G R (Naga)
Sent: Wednesday, November 04, 2015 4:26 PM
To: user@hadoop.apache.org
Subject: RE: hadoop not using whole disk for HDFS
Better would be to stop the daemons and copy the data from /hadoop/hdfs/data to /home/hdfs/data , reconfigure dfs.datanode.data.dir to /home/hdfs/data and then start the daemons. If the data is comparitively less !
Ensure you have the backup if have any critical data !
Regards,
+ Naga
--------------------------------------------------------------------------------
From: Adaryl "Bob" Wakefield, MBA [adaryl.wakefield@hotmail.com]
Sent: Thursday, November 05, 2015 03:40
To: user@hadoop.apache.org
Subject: Re: hadoop not using whole disk for HDFS
So like I can just create a new folder in the home directory like:
home/hdfs/data
and then set dfs.datanode.data.dir to:
/hadoop/hdfs/data,home/hdfs/data
Restart the node and that should do it correct?
Adaryl "Bob" Wakefield, MBA
Principal
Mass Street Analytics, LLC
913.938.6685
www.linkedin.com/in/bobwakefieldmba
Twitter: @BobLovesData
From: Naganarasimha G R (Naga)
Sent: Wednesday, November 04, 2015 3:59 PM
To: user@hadoop.apache.org
Subject: RE: hadoop not using whole disk for HDFS
Hi Bob,
Seems like you have configured to disk dir to be other than an folder in /home, if so try creating another folder and add to "dfs.datanode.data.dir" seperated by comma instead of trying to reset the default.
And its also advised not to use the root partition "/" to be configured for HDFS data dir, if the Dir usage hits the maximum then OS might fail to function properly.
Regards,
+ Naga
--------------------------------------------------------------------------------
From: P lva [ruvikal@gmail.com]
Sent: Thursday, November 05, 2015 03:11
To: user@hadoop.apache.org
Subject: Re: hadoop not using whole disk for HDFS
What does your dfs.datanode.data.dir point to ?
On Wed, Nov 4, 2015 at 4:14 PM, Adaryl "Bob" Wakefield, MBA <ad...@hotmail.com> wrote:
Filesystem Size Used Avail Use% Mounted on
/dev/mapper/centos-root 50G 12G 39G 23% /
devtmpfs 16G 0 16G 0% /dev
tmpfs 16G 0 16G 0% /dev/shm
tmpfs 16G 1.4G 15G 9% /run
tmpfs 16G 0 16G 0% /sys/fs/cgroup
/dev/sda2 494M 123M 372M 25% /boot
/dev/mapper/centos-home 2.7T 33M 2.7T 1% /home
That’s from one datanode. The second one is nearly identical. I discovered that 50GB is actually a default. That seems really weird. Disk space is cheap. Why would you not just use most of the disk and why is it so hard to reset the default?
Adaryl "Bob" Wakefield, MBA
Principal
Mass Street Analytics, LLC
913.938.6685
www.linkedin.com/in/bobwakefieldmba
Twitter: @BobLovesData
From: Chris Nauroth
Sent: Wednesday, November 04, 2015 12:16 PM
To: user@hadoop.apache.org
Subject: Re: hadoop not using whole disk for HDFS
How are those drives partitioned? Is it possible that the directories pointed to by the dfs.datanode.data.dir property in hdfs-site.xml reside on partitions that are sized to only 100 GB? Running commands like df would be a good way to check this at the OS level, independently of Hadoop.
--Chris Nauroth
From: MBA <ad...@hotmail.com>
Reply-To: "user@hadoop.apache.org" <us...@hadoop.apache.org>
Date: Tuesday, November 3, 2015 at 11:16 AM
To: "user@hadoop.apache.org" <us...@hadoop.apache.org>
Subject: Re: hadoop not using whole disk for HDFS
Yeah. It has the current value of 1073741824 which is like 1.07 gig.
B.
From: Chris Nauroth
Sent: Tuesday, November 03, 2015 11:57 AM
To: user@hadoop.apache.org
Subject: Re: hadoop not using whole disk for HDFS
Hi Bob,
Does the hdfs-site.xml configuration file contain the property dfs.datanode.du.reserved? If this is defined, then the DataNode intentionally will not use this space for storage of replicas.
<property>
<name>dfs.datanode.du.reserved</name>
<value>0</value>
<description>Reserved space in bytes per volume. Always leave this much space free for non dfs use.
</description>
</property>
--Chris Nauroth
From: MBA <ad...@hotmail.com>
Reply-To: "user@hadoop.apache.org" <us...@hadoop.apache.org>
Date: Tuesday, November 3, 2015 at 10:51 AM
To: "user@hadoop.apache.org" <us...@hadoop.apache.org>
Subject: hadoop not using whole disk for HDFS
I’ve got the Hortonworks distro running on a three node cluster. For some reason the disk available for HDFS is MUCH less than the total disk space. Both of my data nodes have 3TB hard drives. Only 100GB of that is being used for HDFS. Is it possible that I have a setting wrong somewhere?
B.
RE: hadoop not using whole disk for HDFS
Posted by "Naganarasimha G R (Naga)" <ga...@huawei.com>.
Thanks Brahma, dint realize he might have configured both directories and i was assuming bob has configured single new directory "/hdfs/data".
So virtually its showing additional space,
manually try to add a data dir in /home, for your usecase, and restart datanodes.
Not sure about the impacs in Ambari but worth a try! , more permanent solution would be better remount
Filesystem Size Used Avail Use% Mounted on
/dev/mapper/centos-home 2.7T 33M 2.7T 1% /home
________________________________
From: Brahma Reddy Battula [brahmareddy.battula@huawei.com]
Sent: Friday, November 06, 2015 08:19
To: user@hadoop.apache.org
Subject: RE: hadoop not using whole disk for HDFS
For each configured dfs.datanode.data.dir , HDFS thinks its in separate partiotion and counts the capacity separately. So when another dir is added /hdfs/data, HDFS thinks new partition is added, So it increased the capacity 50GB per node. i.e. 100GB for 2 Nodes.
Not allowing /home directory to configure for data.dir might be ambari's constraint, instead you can manually try to add a data dir in /home, for your usecase, and restart datanodes.
Thanks & Regards
Brahma Reddy Battula
________________________________
From: Naganarasimha G R (Naga) [garlanaganarasimha@huawei.com]
Sent: Friday, November 06, 2015 7:20 AM
To: user@hadoop.apache.org
Subject: RE: hadoop not using whole disk for HDFS
Hi Bob,
1. I wasn’t able to set the config to /home/hdfs/data. I got an error that told me I’m not allowed to set that config to the /home directory. So I made it /hdfs/data.
Naga : I am not sure about the HDP Distro but if you make it point to /hdfs/data, still it will be pointing to the root mount itself i.e.
/dev/mapper/centos-root 50G 12G 39G 23% /
Other Alternative is to mount the drive to some other folder other than /home and then try.
2. When I restarted, the space available increased by a whopping 100GB.
Naga : I am particularly not sure how this happened may be you can again recheck if you enter the command "df -h <path of the NM data dir configured>" you will find out how much disk space is available on the related mount for which the path is configured.
Regards,
+ Naga
________________________________
From: Adaryl "Bob" Wakefield, MBA [adaryl.wakefield@hotmail.com]
Sent: Friday, November 06, 2015 06:54
To: user@hadoop.apache.org
Subject: Re: hadoop not using whole disk for HDFS
Is there a maximum amount of disk space that HDFS will use? Is 100GB that max? When we’re supposed to be dealing with “big data” why is the amount of data to be held on any one box such a small number when you’ve got terabytes available?
Adaryl "Bob" Wakefield, MBA
Principal
Mass Street Analytics, LLC
913.938.6685
www.linkedin.com/in/bobwakefieldmba
Twitter: @BobLovesData
From: Adaryl "Bob" Wakefield, MBA<ma...@hotmail.com>
Sent: Wednesday, November 04, 2015 4:38 PM
To: user@hadoop.apache.org<ma...@hadoop.apache.org>
Subject: Re: hadoop not using whole disk for HDFS
This is an experimental cluster and there isn’t anything I can’t lose. I ran into some issues. I’m running the Hortonworks distro and am managing things through Ambari.
1. I wasn’t able to set the config to /home/hdfs/data. I got an error that told me I’m not allowed to set that config to the /home directory. So I made it /hdfs/data.
2. When I restarted, the space available increased by a whopping 100GB.
Adaryl "Bob" Wakefield, MBA
Principal
Mass Street Analytics, LLC
913.938.6685
www.linkedin.com/in/bobwakefieldmba
Twitter: @BobLovesData
From: Naganarasimha G R (Naga)<ma...@huawei.com>
Sent: Wednesday, November 04, 2015 4:26 PM
To: user@hadoop.apache.org<ma...@hadoop.apache.org>
Subject: RE: hadoop not using whole disk for HDFS
Better would be to stop the daemons and copy the data from /hadoop/hdfs/data to /home/hdfs/data , reconfigure dfs.datanode.data.dir to /home/hdfs/data and then start the daemons. If the data is comparitively less !
Ensure you have the backup if have any critical data !
Regards,
+ Naga
________________________________
From: Adaryl "Bob" Wakefield, MBA [adaryl.wakefield@hotmail.com]
Sent: Thursday, November 05, 2015 03:40
To: user@hadoop.apache.org
Subject: Re: hadoop not using whole disk for HDFS
So like I can just create a new folder in the home directory like:
home/hdfs/data
and then set dfs.datanode.data.dir to:
/hadoop/hdfs/data,home/hdfs/data
Restart the node and that should do it correct?
Adaryl "Bob" Wakefield, MBA
Principal
Mass Street Analytics, LLC
913.938.6685
www.linkedin.com/in/bobwakefieldmba
Twitter: @BobLovesData
From: Naganarasimha G R (Naga)<ma...@huawei.com>
Sent: Wednesday, November 04, 2015 3:59 PM
To: user@hadoop.apache.org<ma...@hadoop.apache.org>
Subject: RE: hadoop not using whole disk for HDFS
Hi Bob,
Seems like you have configured to disk dir to be other than an folder in /home, if so try creating another folder and add to "dfs.datanode.data.dir" seperated by comma instead of trying to reset the default.
And its also advised not to use the root partition "/" to be configured for HDFS data dir, if the Dir usage hits the maximum then OS might fail to function properly.
Regards,
+ Naga
________________________________
From: P lva [ruvikal@gmail.com]
Sent: Thursday, November 05, 2015 03:11
To: user@hadoop.apache.org
Subject: Re: hadoop not using whole disk for HDFS
What does your dfs.datanode.data.dir point to ?
On Wed, Nov 4, 2015 at 4:14 PM, Adaryl "Bob" Wakefield, MBA <ad...@hotmail.com>> wrote:
Filesystem Size Used Avail Use% Mounted on
/dev/mapper/centos-root 50G 12G 39G 23% /
devtmpfs 16G 0 16G 0% /dev
tmpfs 16G 0 16G 0% /dev/shm
tmpfs 16G 1.4G 15G 9% /run
tmpfs 16G 0 16G 0% /sys/fs/cgroup
/dev/sda2 494M 123M 372M 25% /boot
/dev/mapper/centos-home 2.7T 33M 2.7T 1% /home
That’s from one datanode. The second one is nearly identical. I discovered that 50GB is actually a default. That seems really weird. Disk space is cheap. Why would you not just use most of the disk and why is it so hard to reset the default?
Adaryl "Bob" Wakefield, MBA
Principal
Mass Street Analytics, LLC
913.938.6685<tel:913.938.6685>
www.linkedin.com/in/bobwakefieldmba<http://www.linkedin.com/in/bobwakefieldmba>
Twitter: @BobLovesData
From: Chris Nauroth<ma...@hortonworks.com>
Sent: Wednesday, November 04, 2015 12:16 PM
To: user@hadoop.apache.org<ma...@hadoop.apache.org>
Subject: Re: hadoop not using whole disk for HDFS
How are those drives partitioned? Is it possible that the directories pointed to by the dfs.datanode.data.dir property in hdfs-site.xml reside on partitions that are sized to only 100 GB? Running commands like df would be a good way to check this at the OS level, independently of Hadoop.
--Chris Nauroth
From: MBA <ad...@hotmail.com>>
Reply-To: "user@hadoop.apache.org<ma...@hadoop.apache.org>" <us...@hadoop.apache.org>>
Date: Tuesday, November 3, 2015 at 11:16 AM
To: "user@hadoop.apache.org<ma...@hadoop.apache.org>" <us...@hadoop.apache.org>>
Subject: Re: hadoop not using whole disk for HDFS
Yeah. It has the current value of 1073741824 which is like 1.07 gig.
B.
From: Chris Nauroth<ma...@hortonworks.com>
Sent: Tuesday, November 03, 2015 11:57 AM
To: user@hadoop.apache.org<ma...@hadoop.apache.org>
Subject: Re: hadoop not using whole disk for HDFS
Hi Bob,
Does the hdfs-site.xml configuration file contain the property dfs.datanode.du.reserved? If this is defined, then the DataNode intentionally will not use this space for storage of replicas.
<property>
<name>dfs.datanode.du.reserved</name>
<value>0</value>
<description>Reserved space in bytes per volume. Always leave this much space free for non dfs use.
</description>
</property>
--Chris Nauroth
From: MBA <ad...@hotmail.com>>
Reply-To: "user@hadoop.apache.org<ma...@hadoop.apache.org>" <us...@hadoop.apache.org>>
Date: Tuesday, November 3, 2015 at 10:51 AM
To: "user@hadoop.apache.org<ma...@hadoop.apache.org>" <us...@hadoop.apache.org>>
Subject: hadoop not using whole disk for HDFS
I’ve got the Hortonworks distro running on a three node cluster. For some reason the disk available for HDFS is MUCH less than the total disk space. Both of my data nodes have 3TB hard drives. Only 100GB of that is being used for HDFS. Is it possible that I have a setting wrong somewhere?
B.
Re: hadoop not using whole disk for HDFS
Posted by "Adaryl \"Bob\" Wakefield, MBA" <ad...@hotmail.com>.
By manually you mean actually going in with nano and editing the config file? I could do that but if Ambari won’t let you do it through the interface, isn’t it possible that trying to add the directory in home might break something?
Adaryl "Bob" Wakefield, MBA
Principal
Mass Street Analytics, LLC
913.938.6685
www.linkedin.com/in/bobwakefieldmba
Twitter: @BobLovesData
From: Brahma Reddy Battula
Sent: Thursday, November 05, 2015 8:49 PM
To: user@hadoop.apache.org
Subject: RE: hadoop not using whole disk for HDFS
For each configured dfs.datanode.data.dir , HDFS thinks its in separate partiotion and counts the capacity separately. So when another dir is added /hdfs/data, HDFS thinks new partition is added, So it increased the capacity 50GB per node. i.e. 100GB for 2 Nodes.
Not allowing /home directory to configure for data.dir might be ambari's constraint, instead you can manually try to add a data dir in /home, for your usecase, and restart datanodes.
Thanks & Regards
Brahma Reddy Battula
--------------------------------------------------------------------------------
From: Naganarasimha G R (Naga) [garlanaganarasimha@huawei.com]
Sent: Friday, November 06, 2015 7:20 AM
To: user@hadoop.apache.org
Subject: RE: hadoop not using whole disk for HDFS
Hi Bob,
1. I wasn’t able to set the config to /home/hdfs/data. I got an error that told me I’m not allowed to set that config to the /home directory. So I made it /hdfs/data.
Naga : I am not sure about the HDP Distro but if you make it point to /hdfs/data, still it will be pointing to the root mount itself i.e.
/dev/mapper/centos-root 50G 12G 39G 23% /
Other Alternative is to mount the drive to some other folder other than /home and then try.
2. When I restarted, the space available increased by a whopping 100GB.
Naga : I am particularly not sure how this happened may be you can again recheck if you enter the command "df -h <path of the NM data dir configured>" you will find out how much disk space is available on the related mount for which the path is configured.
Regards,
+ Naga
--------------------------------------------------------------------------------
From: Adaryl "Bob" Wakefield, MBA [adaryl.wakefield@hotmail.com]
Sent: Friday, November 06, 2015 06:54
To: user@hadoop.apache.org
Subject: Re: hadoop not using whole disk for HDFS
Is there a maximum amount of disk space that HDFS will use? Is 100GB that max? When we’re supposed to be dealing with “big data” why is the amount of data to be held on any one box such a small number when you’ve got terabytes available?
Adaryl "Bob" Wakefield, MBA
Principal
Mass Street Analytics, LLC
913.938.6685
www.linkedin.com/in/bobwakefieldmba
Twitter: @BobLovesData
From: Adaryl "Bob" Wakefield, MBA
Sent: Wednesday, November 04, 2015 4:38 PM
To: user@hadoop.apache.org
Subject: Re: hadoop not using whole disk for HDFS
This is an experimental cluster and there isn’t anything I can’t lose. I ran into some issues. I’m running the Hortonworks distro and am managing things through Ambari.
1. I wasn’t able to set the config to /home/hdfs/data. I got an error that told me I’m not allowed to set that config to the /home directory. So I made it /hdfs/data.
2. When I restarted, the space available increased by a whopping 100GB.
Adaryl "Bob" Wakefield, MBA
Principal
Mass Street Analytics, LLC
913.938.6685
www.linkedin.com/in/bobwakefieldmba
Twitter: @BobLovesData
From: Naganarasimha G R (Naga)
Sent: Wednesday, November 04, 2015 4:26 PM
To: user@hadoop.apache.org
Subject: RE: hadoop not using whole disk for HDFS
Better would be to stop the daemons and copy the data from /hadoop/hdfs/data to /home/hdfs/data , reconfigure dfs.datanode.data.dir to /home/hdfs/data and then start the daemons. If the data is comparitively less !
Ensure you have the backup if have any critical data !
Regards,
+ Naga
--------------------------------------------------------------------------------
From: Adaryl "Bob" Wakefield, MBA [adaryl.wakefield@hotmail.com]
Sent: Thursday, November 05, 2015 03:40
To: user@hadoop.apache.org
Subject: Re: hadoop not using whole disk for HDFS
So like I can just create a new folder in the home directory like:
home/hdfs/data
and then set dfs.datanode.data.dir to:
/hadoop/hdfs/data,home/hdfs/data
Restart the node and that should do it correct?
Adaryl "Bob" Wakefield, MBA
Principal
Mass Street Analytics, LLC
913.938.6685
www.linkedin.com/in/bobwakefieldmba
Twitter: @BobLovesData
From: Naganarasimha G R (Naga)
Sent: Wednesday, November 04, 2015 3:59 PM
To: user@hadoop.apache.org
Subject: RE: hadoop not using whole disk for HDFS
Hi Bob,
Seems like you have configured to disk dir to be other than an folder in /home, if so try creating another folder and add to "dfs.datanode.data.dir" seperated by comma instead of trying to reset the default.
And its also advised not to use the root partition "/" to be configured for HDFS data dir, if the Dir usage hits the maximum then OS might fail to function properly.
Regards,
+ Naga
--------------------------------------------------------------------------------
From: P lva [ruvikal@gmail.com]
Sent: Thursday, November 05, 2015 03:11
To: user@hadoop.apache.org
Subject: Re: hadoop not using whole disk for HDFS
What does your dfs.datanode.data.dir point to ?
On Wed, Nov 4, 2015 at 4:14 PM, Adaryl "Bob" Wakefield, MBA <ad...@hotmail.com> wrote:
Filesystem Size Used Avail Use% Mounted on
/dev/mapper/centos-root 50G 12G 39G 23% /
devtmpfs 16G 0 16G 0% /dev
tmpfs 16G 0 16G 0% /dev/shm
tmpfs 16G 1.4G 15G 9% /run
tmpfs 16G 0 16G 0% /sys/fs/cgroup
/dev/sda2 494M 123M 372M 25% /boot
/dev/mapper/centos-home 2.7T 33M 2.7T 1% /home
That’s from one datanode. The second one is nearly identical. I discovered that 50GB is actually a default. That seems really weird. Disk space is cheap. Why would you not just use most of the disk and why is it so hard to reset the default?
Adaryl "Bob" Wakefield, MBA
Principal
Mass Street Analytics, LLC
913.938.6685
www.linkedin.com/in/bobwakefieldmba
Twitter: @BobLovesData
From: Chris Nauroth
Sent: Wednesday, November 04, 2015 12:16 PM
To: user@hadoop.apache.org
Subject: Re: hadoop not using whole disk for HDFS
How are those drives partitioned? Is it possible that the directories pointed to by the dfs.datanode.data.dir property in hdfs-site.xml reside on partitions that are sized to only 100 GB? Running commands like df would be a good way to check this at the OS level, independently of Hadoop.
--Chris Nauroth
From: MBA <ad...@hotmail.com>
Reply-To: "user@hadoop.apache.org" <us...@hadoop.apache.org>
Date: Tuesday, November 3, 2015 at 11:16 AM
To: "user@hadoop.apache.org" <us...@hadoop.apache.org>
Subject: Re: hadoop not using whole disk for HDFS
Yeah. It has the current value of 1073741824 which is like 1.07 gig.
B.
From: Chris Nauroth
Sent: Tuesday, November 03, 2015 11:57 AM
To: user@hadoop.apache.org
Subject: Re: hadoop not using whole disk for HDFS
Hi Bob,
Does the hdfs-site.xml configuration file contain the property dfs.datanode.du.reserved? If this is defined, then the DataNode intentionally will not use this space for storage of replicas.
<property>
<name>dfs.datanode.du.reserved</name>
<value>0</value>
<description>Reserved space in bytes per volume. Always leave this much space free for non dfs use.
</description>
</property>
--Chris Nauroth
From: MBA <ad...@hotmail.com>
Reply-To: "user@hadoop.apache.org" <us...@hadoop.apache.org>
Date: Tuesday, November 3, 2015 at 10:51 AM
To: "user@hadoop.apache.org" <us...@hadoop.apache.org>
Subject: hadoop not using whole disk for HDFS
I’ve got the Hortonworks distro running on a three node cluster. For some reason the disk available for HDFS is MUCH less than the total disk space. Both of my data nodes have 3TB hard drives. Only 100GB of that is being used for HDFS. Is it possible that I have a setting wrong somewhere?
B.
RE: hadoop not using whole disk for HDFS
Posted by "Naganarasimha G R (Naga)" <ga...@huawei.com>.
Thanks Brahma, dint realize he might have configured both directories and i was assuming bob has configured single new directory "/hdfs/data".
So virtually its showing additional space,
manually try to add a data dir in /home, for your usecase, and restart datanodes.
Not sure about the impacs in Ambari but worth a try! , more permanent solution would be better remount
Filesystem Size Used Avail Use% Mounted on
/dev/mapper/centos-home 2.7T 33M 2.7T 1% /home
________________________________
From: Brahma Reddy Battula [brahmareddy.battula@huawei.com]
Sent: Friday, November 06, 2015 08:19
To: user@hadoop.apache.org
Subject: RE: hadoop not using whole disk for HDFS
For each configured dfs.datanode.data.dir , HDFS thinks its in separate partiotion and counts the capacity separately. So when another dir is added /hdfs/data, HDFS thinks new partition is added, So it increased the capacity 50GB per node. i.e. 100GB for 2 Nodes.
Not allowing /home directory to configure for data.dir might be ambari's constraint, instead you can manually try to add a data dir in /home, for your usecase, and restart datanodes.
Thanks & Regards
Brahma Reddy Battula
________________________________
From: Naganarasimha G R (Naga) [garlanaganarasimha@huawei.com]
Sent: Friday, November 06, 2015 7:20 AM
To: user@hadoop.apache.org
Subject: RE: hadoop not using whole disk for HDFS
Hi Bob,
1. I wasn’t able to set the config to /home/hdfs/data. I got an error that told me I’m not allowed to set that config to the /home directory. So I made it /hdfs/data.
Naga : I am not sure about the HDP Distro but if you make it point to /hdfs/data, still it will be pointing to the root mount itself i.e.
/dev/mapper/centos-root 50G 12G 39G 23% /
Other Alternative is to mount the drive to some other folder other than /home and then try.
2. When I restarted, the space available increased by a whopping 100GB.
Naga : I am particularly not sure how this happened may be you can again recheck if you enter the command "df -h <path of the NM data dir configured>" you will find out how much disk space is available on the related mount for which the path is configured.
Regards,
+ Naga
________________________________
From: Adaryl "Bob" Wakefield, MBA [adaryl.wakefield@hotmail.com]
Sent: Friday, November 06, 2015 06:54
To: user@hadoop.apache.org
Subject: Re: hadoop not using whole disk for HDFS
Is there a maximum amount of disk space that HDFS will use? Is 100GB that max? When we’re supposed to be dealing with “big data” why is the amount of data to be held on any one box such a small number when you’ve got terabytes available?
Adaryl "Bob" Wakefield, MBA
Principal
Mass Street Analytics, LLC
913.938.6685
www.linkedin.com/in/bobwakefieldmba
Twitter: @BobLovesData
From: Adaryl "Bob" Wakefield, MBA<ma...@hotmail.com>
Sent: Wednesday, November 04, 2015 4:38 PM
To: user@hadoop.apache.org<ma...@hadoop.apache.org>
Subject: Re: hadoop not using whole disk for HDFS
This is an experimental cluster and there isn’t anything I can’t lose. I ran into some issues. I’m running the Hortonworks distro and am managing things through Ambari.
1. I wasn’t able to set the config to /home/hdfs/data. I got an error that told me I’m not allowed to set that config to the /home directory. So I made it /hdfs/data.
2. When I restarted, the space available increased by a whopping 100GB.
Adaryl "Bob" Wakefield, MBA
Principal
Mass Street Analytics, LLC
913.938.6685
www.linkedin.com/in/bobwakefieldmba
Twitter: @BobLovesData
From: Naganarasimha G R (Naga)<ma...@huawei.com>
Sent: Wednesday, November 04, 2015 4:26 PM
To: user@hadoop.apache.org<ma...@hadoop.apache.org>
Subject: RE: hadoop not using whole disk for HDFS
Better would be to stop the daemons and copy the data from /hadoop/hdfs/data to /home/hdfs/data , reconfigure dfs.datanode.data.dir to /home/hdfs/data and then start the daemons. If the data is comparitively less !
Ensure you have the backup if have any critical data !
Regards,
+ Naga
________________________________
From: Adaryl "Bob" Wakefield, MBA [adaryl.wakefield@hotmail.com]
Sent: Thursday, November 05, 2015 03:40
To: user@hadoop.apache.org
Subject: Re: hadoop not using whole disk for HDFS
So like I can just create a new folder in the home directory like:
home/hdfs/data
and then set dfs.datanode.data.dir to:
/hadoop/hdfs/data,home/hdfs/data
Restart the node and that should do it correct?
Adaryl "Bob" Wakefield, MBA
Principal
Mass Street Analytics, LLC
913.938.6685
www.linkedin.com/in/bobwakefieldmba
Twitter: @BobLovesData
From: Naganarasimha G R (Naga)<ma...@huawei.com>
Sent: Wednesday, November 04, 2015 3:59 PM
To: user@hadoop.apache.org<ma...@hadoop.apache.org>
Subject: RE: hadoop not using whole disk for HDFS
Hi Bob,
Seems like you have configured to disk dir to be other than an folder in /home, if so try creating another folder and add to "dfs.datanode.data.dir" seperated by comma instead of trying to reset the default.
And its also advised not to use the root partition "/" to be configured for HDFS data dir, if the Dir usage hits the maximum then OS might fail to function properly.
Regards,
+ Naga
________________________________
From: P lva [ruvikal@gmail.com]
Sent: Thursday, November 05, 2015 03:11
To: user@hadoop.apache.org
Subject: Re: hadoop not using whole disk for HDFS
What does your dfs.datanode.data.dir point to ?
On Wed, Nov 4, 2015 at 4:14 PM, Adaryl "Bob" Wakefield, MBA <ad...@hotmail.com>> wrote:
Filesystem Size Used Avail Use% Mounted on
/dev/mapper/centos-root 50G 12G 39G 23% /
devtmpfs 16G 0 16G 0% /dev
tmpfs 16G 0 16G 0% /dev/shm
tmpfs 16G 1.4G 15G 9% /run
tmpfs 16G 0 16G 0% /sys/fs/cgroup
/dev/sda2 494M 123M 372M 25% /boot
/dev/mapper/centos-home 2.7T 33M 2.7T 1% /home
That’s from one datanode. The second one is nearly identical. I discovered that 50GB is actually a default. That seems really weird. Disk space is cheap. Why would you not just use most of the disk and why is it so hard to reset the default?
Adaryl "Bob" Wakefield, MBA
Principal
Mass Street Analytics, LLC
913.938.6685<tel:913.938.6685>
www.linkedin.com/in/bobwakefieldmba<http://www.linkedin.com/in/bobwakefieldmba>
Twitter: @BobLovesData
From: Chris Nauroth<ma...@hortonworks.com>
Sent: Wednesday, November 04, 2015 12:16 PM
To: user@hadoop.apache.org<ma...@hadoop.apache.org>
Subject: Re: hadoop not using whole disk for HDFS
How are those drives partitioned? Is it possible that the directories pointed to by the dfs.datanode.data.dir property in hdfs-site.xml reside on partitions that are sized to only 100 GB? Running commands like df would be a good way to check this at the OS level, independently of Hadoop.
--Chris Nauroth
From: MBA <ad...@hotmail.com>>
Reply-To: "user@hadoop.apache.org<ma...@hadoop.apache.org>" <us...@hadoop.apache.org>>
Date: Tuesday, November 3, 2015 at 11:16 AM
To: "user@hadoop.apache.org<ma...@hadoop.apache.org>" <us...@hadoop.apache.org>>
Subject: Re: hadoop not using whole disk for HDFS
Yeah. It has the current value of 1073741824 which is like 1.07 gig.
B.
From: Chris Nauroth<ma...@hortonworks.com>
Sent: Tuesday, November 03, 2015 11:57 AM
To: user@hadoop.apache.org<ma...@hadoop.apache.org>
Subject: Re: hadoop not using whole disk for HDFS
Hi Bob,
Does the hdfs-site.xml configuration file contain the property dfs.datanode.du.reserved? If this is defined, then the DataNode intentionally will not use this space for storage of replicas.
<property>
<name>dfs.datanode.du.reserved</name>
<value>0</value>
<description>Reserved space in bytes per volume. Always leave this much space free for non dfs use.
</description>
</property>
--Chris Nauroth
From: MBA <ad...@hotmail.com>>
Reply-To: "user@hadoop.apache.org<ma...@hadoop.apache.org>" <us...@hadoop.apache.org>>
Date: Tuesday, November 3, 2015 at 10:51 AM
To: "user@hadoop.apache.org<ma...@hadoop.apache.org>" <us...@hadoop.apache.org>>
Subject: hadoop not using whole disk for HDFS
I’ve got the Hortonworks distro running on a three node cluster. For some reason the disk available for HDFS is MUCH less than the total disk space. Both of my data nodes have 3TB hard drives. Only 100GB of that is being used for HDFS. Is it possible that I have a setting wrong somewhere?
B.
RE: hadoop not using whole disk for HDFS
Posted by "Naganarasimha G R (Naga)" <ga...@huawei.com>.
Thanks Brahma, dint realize he might have configured both directories and i was assuming bob has configured single new directory "/hdfs/data".
So virtually its showing additional space,
manually try to add a data dir in /home, for your usecase, and restart datanodes.
Not sure about the impacs in Ambari but worth a try! , more permanent solution would be better remount
Filesystem Size Used Avail Use% Mounted on
/dev/mapper/centos-home 2.7T 33M 2.7T 1% /home
________________________________
From: Brahma Reddy Battula [brahmareddy.battula@huawei.com]
Sent: Friday, November 06, 2015 08:19
To: user@hadoop.apache.org
Subject: RE: hadoop not using whole disk for HDFS
For each configured dfs.datanode.data.dir , HDFS thinks its in separate partiotion and counts the capacity separately. So when another dir is added /hdfs/data, HDFS thinks new partition is added, So it increased the capacity 50GB per node. i.e. 100GB for 2 Nodes.
Not allowing /home directory to configure for data.dir might be ambari's constraint, instead you can manually try to add a data dir in /home, for your usecase, and restart datanodes.
Thanks & Regards
Brahma Reddy Battula
________________________________
From: Naganarasimha G R (Naga) [garlanaganarasimha@huawei.com]
Sent: Friday, November 06, 2015 7:20 AM
To: user@hadoop.apache.org
Subject: RE: hadoop not using whole disk for HDFS
Hi Bob,
1. I wasn’t able to set the config to /home/hdfs/data. I got an error that told me I’m not allowed to set that config to the /home directory. So I made it /hdfs/data.
Naga : I am not sure about the HDP Distro but if you make it point to /hdfs/data, still it will be pointing to the root mount itself i.e.
/dev/mapper/centos-root 50G 12G 39G 23% /
Other Alternative is to mount the drive to some other folder other than /home and then try.
2. When I restarted, the space available increased by a whopping 100GB.
Naga : I am particularly not sure how this happened may be you can again recheck if you enter the command "df -h <path of the NM data dir configured>" you will find out how much disk space is available on the related mount for which the path is configured.
Regards,
+ Naga
________________________________
From: Adaryl "Bob" Wakefield, MBA [adaryl.wakefield@hotmail.com]
Sent: Friday, November 06, 2015 06:54
To: user@hadoop.apache.org
Subject: Re: hadoop not using whole disk for HDFS
Is there a maximum amount of disk space that HDFS will use? Is 100GB that max? When we’re supposed to be dealing with “big data” why is the amount of data to be held on any one box such a small number when you’ve got terabytes available?
Adaryl "Bob" Wakefield, MBA
Principal
Mass Street Analytics, LLC
913.938.6685
www.linkedin.com/in/bobwakefieldmba
Twitter: @BobLovesData
From: Adaryl "Bob" Wakefield, MBA<ma...@hotmail.com>
Sent: Wednesday, November 04, 2015 4:38 PM
To: user@hadoop.apache.org<ma...@hadoop.apache.org>
Subject: Re: hadoop not using whole disk for HDFS
This is an experimental cluster and there isn’t anything I can’t lose. I ran into some issues. I’m running the Hortonworks distro and am managing things through Ambari.
1. I wasn’t able to set the config to /home/hdfs/data. I got an error that told me I’m not allowed to set that config to the /home directory. So I made it /hdfs/data.
2. When I restarted, the space available increased by a whopping 100GB.
Adaryl "Bob" Wakefield, MBA
Principal
Mass Street Analytics, LLC
913.938.6685
www.linkedin.com/in/bobwakefieldmba
Twitter: @BobLovesData
From: Naganarasimha G R (Naga)<ma...@huawei.com>
Sent: Wednesday, November 04, 2015 4:26 PM
To: user@hadoop.apache.org<ma...@hadoop.apache.org>
Subject: RE: hadoop not using whole disk for HDFS
Better would be to stop the daemons and copy the data from /hadoop/hdfs/data to /home/hdfs/data , reconfigure dfs.datanode.data.dir to /home/hdfs/data and then start the daemons. If the data is comparitively less !
Ensure you have the backup if have any critical data !
Regards,
+ Naga
________________________________
From: Adaryl "Bob" Wakefield, MBA [adaryl.wakefield@hotmail.com]
Sent: Thursday, November 05, 2015 03:40
To: user@hadoop.apache.org
Subject: Re: hadoop not using whole disk for HDFS
So like I can just create a new folder in the home directory like:
home/hdfs/data
and then set dfs.datanode.data.dir to:
/hadoop/hdfs/data,home/hdfs/data
Restart the node and that should do it correct?
Adaryl "Bob" Wakefield, MBA
Principal
Mass Street Analytics, LLC
913.938.6685
www.linkedin.com/in/bobwakefieldmba
Twitter: @BobLovesData
From: Naganarasimha G R (Naga)<ma...@huawei.com>
Sent: Wednesday, November 04, 2015 3:59 PM
To: user@hadoop.apache.org<ma...@hadoop.apache.org>
Subject: RE: hadoop not using whole disk for HDFS
Hi Bob,
Seems like you have configured to disk dir to be other than an folder in /home, if so try creating another folder and add to "dfs.datanode.data.dir" seperated by comma instead of trying to reset the default.
And its also advised not to use the root partition "/" to be configured for HDFS data dir, if the Dir usage hits the maximum then OS might fail to function properly.
Regards,
+ Naga
________________________________
From: P lva [ruvikal@gmail.com]
Sent: Thursday, November 05, 2015 03:11
To: user@hadoop.apache.org
Subject: Re: hadoop not using whole disk for HDFS
What does your dfs.datanode.data.dir point to ?
On Wed, Nov 4, 2015 at 4:14 PM, Adaryl "Bob" Wakefield, MBA <ad...@hotmail.com>> wrote:
Filesystem Size Used Avail Use% Mounted on
/dev/mapper/centos-root 50G 12G 39G 23% /
devtmpfs 16G 0 16G 0% /dev
tmpfs 16G 0 16G 0% /dev/shm
tmpfs 16G 1.4G 15G 9% /run
tmpfs 16G 0 16G 0% /sys/fs/cgroup
/dev/sda2 494M 123M 372M 25% /boot
/dev/mapper/centos-home 2.7T 33M 2.7T 1% /home
That’s from one datanode. The second one is nearly identical. I discovered that 50GB is actually a default. That seems really weird. Disk space is cheap. Why would you not just use most of the disk and why is it so hard to reset the default?
Adaryl "Bob" Wakefield, MBA
Principal
Mass Street Analytics, LLC
913.938.6685<tel:913.938.6685>
www.linkedin.com/in/bobwakefieldmba<http://www.linkedin.com/in/bobwakefieldmba>
Twitter: @BobLovesData
From: Chris Nauroth<ma...@hortonworks.com>
Sent: Wednesday, November 04, 2015 12:16 PM
To: user@hadoop.apache.org<ma...@hadoop.apache.org>
Subject: Re: hadoop not using whole disk for HDFS
How are those drives partitioned? Is it possible that the directories pointed to by the dfs.datanode.data.dir property in hdfs-site.xml reside on partitions that are sized to only 100 GB? Running commands like df would be a good way to check this at the OS level, independently of Hadoop.
--Chris Nauroth
From: MBA <ad...@hotmail.com>>
Reply-To: "user@hadoop.apache.org<ma...@hadoop.apache.org>" <us...@hadoop.apache.org>>
Date: Tuesday, November 3, 2015 at 11:16 AM
To: "user@hadoop.apache.org<ma...@hadoop.apache.org>" <us...@hadoop.apache.org>>
Subject: Re: hadoop not using whole disk for HDFS
Yeah. It has the current value of 1073741824 which is like 1.07 gig.
B.
From: Chris Nauroth<ma...@hortonworks.com>
Sent: Tuesday, November 03, 2015 11:57 AM
To: user@hadoop.apache.org<ma...@hadoop.apache.org>
Subject: Re: hadoop not using whole disk for HDFS
Hi Bob,
Does the hdfs-site.xml configuration file contain the property dfs.datanode.du.reserved? If this is defined, then the DataNode intentionally will not use this space for storage of replicas.
<property>
<name>dfs.datanode.du.reserved</name>
<value>0</value>
<description>Reserved space in bytes per volume. Always leave this much space free for non dfs use.
</description>
</property>
--Chris Nauroth
From: MBA <ad...@hotmail.com>>
Reply-To: "user@hadoop.apache.org<ma...@hadoop.apache.org>" <us...@hadoop.apache.org>>
Date: Tuesday, November 3, 2015 at 10:51 AM
To: "user@hadoop.apache.org<ma...@hadoop.apache.org>" <us...@hadoop.apache.org>>
Subject: hadoop not using whole disk for HDFS
I’ve got the Hortonworks distro running on a three node cluster. For some reason the disk available for HDFS is MUCH less than the total disk space. Both of my data nodes have 3TB hard drives. Only 100GB of that is being used for HDFS. Is it possible that I have a setting wrong somewhere?
B.
Re: hadoop not using whole disk for HDFS
Posted by "Adaryl \"Bob\" Wakefield, MBA" <ad...@hotmail.com>.
By manually you mean actually going in with nano and editing the config file? I could do that but if Ambari won’t let you do it through the interface, isn’t it possible that trying to add the directory in home might break something?
Adaryl "Bob" Wakefield, MBA
Principal
Mass Street Analytics, LLC
913.938.6685
www.linkedin.com/in/bobwakefieldmba
Twitter: @BobLovesData
From: Brahma Reddy Battula
Sent: Thursday, November 05, 2015 8:49 PM
To: user@hadoop.apache.org
Subject: RE: hadoop not using whole disk for HDFS
For each configured dfs.datanode.data.dir , HDFS thinks its in separate partiotion and counts the capacity separately. So when another dir is added /hdfs/data, HDFS thinks new partition is added, So it increased the capacity 50GB per node. i.e. 100GB for 2 Nodes.
Not allowing /home directory to configure for data.dir might be ambari's constraint, instead you can manually try to add a data dir in /home, for your usecase, and restart datanodes.
Thanks & Regards
Brahma Reddy Battula
--------------------------------------------------------------------------------
From: Naganarasimha G R (Naga) [garlanaganarasimha@huawei.com]
Sent: Friday, November 06, 2015 7:20 AM
To: user@hadoop.apache.org
Subject: RE: hadoop not using whole disk for HDFS
Hi Bob,
1. I wasn’t able to set the config to /home/hdfs/data. I got an error that told me I’m not allowed to set that config to the /home directory. So I made it /hdfs/data.
Naga : I am not sure about the HDP Distro but if you make it point to /hdfs/data, still it will be pointing to the root mount itself i.e.
/dev/mapper/centos-root 50G 12G 39G 23% /
Other Alternative is to mount the drive to some other folder other than /home and then try.
2. When I restarted, the space available increased by a whopping 100GB.
Naga : I am particularly not sure how this happened may be you can again recheck if you enter the command "df -h <path of the NM data dir configured>" you will find out how much disk space is available on the related mount for which the path is configured.
Regards,
+ Naga
--------------------------------------------------------------------------------
From: Adaryl "Bob" Wakefield, MBA [adaryl.wakefield@hotmail.com]
Sent: Friday, November 06, 2015 06:54
To: user@hadoop.apache.org
Subject: Re: hadoop not using whole disk for HDFS
Is there a maximum amount of disk space that HDFS will use? Is 100GB that max? When we’re supposed to be dealing with “big data” why is the amount of data to be held on any one box such a small number when you’ve got terabytes available?
Adaryl "Bob" Wakefield, MBA
Principal
Mass Street Analytics, LLC
913.938.6685
www.linkedin.com/in/bobwakefieldmba
Twitter: @BobLovesData
From: Adaryl "Bob" Wakefield, MBA
Sent: Wednesday, November 04, 2015 4:38 PM
To: user@hadoop.apache.org
Subject: Re: hadoop not using whole disk for HDFS
This is an experimental cluster and there isn’t anything I can’t lose. I ran into some issues. I’m running the Hortonworks distro and am managing things through Ambari.
1. I wasn’t able to set the config to /home/hdfs/data. I got an error that told me I’m not allowed to set that config to the /home directory. So I made it /hdfs/data.
2. When I restarted, the space available increased by a whopping 100GB.
Adaryl "Bob" Wakefield, MBA
Principal
Mass Street Analytics, LLC
913.938.6685
www.linkedin.com/in/bobwakefieldmba
Twitter: @BobLovesData
From: Naganarasimha G R (Naga)
Sent: Wednesday, November 04, 2015 4:26 PM
To: user@hadoop.apache.org
Subject: RE: hadoop not using whole disk for HDFS
Better would be to stop the daemons and copy the data from /hadoop/hdfs/data to /home/hdfs/data , reconfigure dfs.datanode.data.dir to /home/hdfs/data and then start the daemons. If the data is comparitively less !
Ensure you have the backup if have any critical data !
Regards,
+ Naga
--------------------------------------------------------------------------------
From: Adaryl "Bob" Wakefield, MBA [adaryl.wakefield@hotmail.com]
Sent: Thursday, November 05, 2015 03:40
To: user@hadoop.apache.org
Subject: Re: hadoop not using whole disk for HDFS
So like I can just create a new folder in the home directory like:
home/hdfs/data
and then set dfs.datanode.data.dir to:
/hadoop/hdfs/data,home/hdfs/data
Restart the node and that should do it correct?
Adaryl "Bob" Wakefield, MBA
Principal
Mass Street Analytics, LLC
913.938.6685
www.linkedin.com/in/bobwakefieldmba
Twitter: @BobLovesData
From: Naganarasimha G R (Naga)
Sent: Wednesday, November 04, 2015 3:59 PM
To: user@hadoop.apache.org
Subject: RE: hadoop not using whole disk for HDFS
Hi Bob,
Seems like you have configured to disk dir to be other than an folder in /home, if so try creating another folder and add to "dfs.datanode.data.dir" seperated by comma instead of trying to reset the default.
And its also advised not to use the root partition "/" to be configured for HDFS data dir, if the Dir usage hits the maximum then OS might fail to function properly.
Regards,
+ Naga
--------------------------------------------------------------------------------
From: P lva [ruvikal@gmail.com]
Sent: Thursday, November 05, 2015 03:11
To: user@hadoop.apache.org
Subject: Re: hadoop not using whole disk for HDFS
What does your dfs.datanode.data.dir point to ?
On Wed, Nov 4, 2015 at 4:14 PM, Adaryl "Bob" Wakefield, MBA <ad...@hotmail.com> wrote:
Filesystem Size Used Avail Use% Mounted on
/dev/mapper/centos-root 50G 12G 39G 23% /
devtmpfs 16G 0 16G 0% /dev
tmpfs 16G 0 16G 0% /dev/shm
tmpfs 16G 1.4G 15G 9% /run
tmpfs 16G 0 16G 0% /sys/fs/cgroup
/dev/sda2 494M 123M 372M 25% /boot
/dev/mapper/centos-home 2.7T 33M 2.7T 1% /home
That’s from one datanode. The second one is nearly identical. I discovered that 50GB is actually a default. That seems really weird. Disk space is cheap. Why would you not just use most of the disk and why is it so hard to reset the default?
Adaryl "Bob" Wakefield, MBA
Principal
Mass Street Analytics, LLC
913.938.6685
www.linkedin.com/in/bobwakefieldmba
Twitter: @BobLovesData
From: Chris Nauroth
Sent: Wednesday, November 04, 2015 12:16 PM
To: user@hadoop.apache.org
Subject: Re: hadoop not using whole disk for HDFS
How are those drives partitioned? Is it possible that the directories pointed to by the dfs.datanode.data.dir property in hdfs-site.xml reside on partitions that are sized to only 100 GB? Running commands like df would be a good way to check this at the OS level, independently of Hadoop.
--Chris Nauroth
From: MBA <ad...@hotmail.com>
Reply-To: "user@hadoop.apache.org" <us...@hadoop.apache.org>
Date: Tuesday, November 3, 2015 at 11:16 AM
To: "user@hadoop.apache.org" <us...@hadoop.apache.org>
Subject: Re: hadoop not using whole disk for HDFS
Yeah. It has the current value of 1073741824 which is like 1.07 gig.
B.
From: Chris Nauroth
Sent: Tuesday, November 03, 2015 11:57 AM
To: user@hadoop.apache.org
Subject: Re: hadoop not using whole disk for HDFS
Hi Bob,
Does the hdfs-site.xml configuration file contain the property dfs.datanode.du.reserved? If this is defined, then the DataNode intentionally will not use this space for storage of replicas.
<property>
<name>dfs.datanode.du.reserved</name>
<value>0</value>
<description>Reserved space in bytes per volume. Always leave this much space free for non dfs use.
</description>
</property>
--Chris Nauroth
From: MBA <ad...@hotmail.com>
Reply-To: "user@hadoop.apache.org" <us...@hadoop.apache.org>
Date: Tuesday, November 3, 2015 at 10:51 AM
To: "user@hadoop.apache.org" <us...@hadoop.apache.org>
Subject: hadoop not using whole disk for HDFS
I’ve got the Hortonworks distro running on a three node cluster. For some reason the disk available for HDFS is MUCH less than the total disk space. Both of my data nodes have 3TB hard drives. Only 100GB of that is being used for HDFS. Is it possible that I have a setting wrong somewhere?
B.
Re: hadoop not using whole disk for HDFS
Posted by "Adaryl \"Bob\" Wakefield, MBA" <ad...@hotmail.com>.
By manually you mean actually going in with nano and editing the config file? I could do that but if Ambari won’t let you do it through the interface, isn’t it possible that trying to add the directory in home might break something?
Adaryl "Bob" Wakefield, MBA
Principal
Mass Street Analytics, LLC
913.938.6685
www.linkedin.com/in/bobwakefieldmba
Twitter: @BobLovesData
From: Brahma Reddy Battula
Sent: Thursday, November 05, 2015 8:49 PM
To: user@hadoop.apache.org
Subject: RE: hadoop not using whole disk for HDFS
For each configured dfs.datanode.data.dir , HDFS thinks its in separate partiotion and counts the capacity separately. So when another dir is added /hdfs/data, HDFS thinks new partition is added, So it increased the capacity 50GB per node. i.e. 100GB for 2 Nodes.
Not allowing /home directory to configure for data.dir might be ambari's constraint, instead you can manually try to add a data dir in /home, for your usecase, and restart datanodes.
Thanks & Regards
Brahma Reddy Battula
--------------------------------------------------------------------------------
From: Naganarasimha G R (Naga) [garlanaganarasimha@huawei.com]
Sent: Friday, November 06, 2015 7:20 AM
To: user@hadoop.apache.org
Subject: RE: hadoop not using whole disk for HDFS
Hi Bob,
1. I wasn’t able to set the config to /home/hdfs/data. I got an error that told me I’m not allowed to set that config to the /home directory. So I made it /hdfs/data.
Naga : I am not sure about the HDP Distro but if you make it point to /hdfs/data, still it will be pointing to the root mount itself i.e.
/dev/mapper/centos-root 50G 12G 39G 23% /
Other Alternative is to mount the drive to some other folder other than /home and then try.
2. When I restarted, the space available increased by a whopping 100GB.
Naga : I am particularly not sure how this happened may be you can again recheck if you enter the command "df -h <path of the NM data dir configured>" you will find out how much disk space is available on the related mount for which the path is configured.
Regards,
+ Naga
--------------------------------------------------------------------------------
From: Adaryl "Bob" Wakefield, MBA [adaryl.wakefield@hotmail.com]
Sent: Friday, November 06, 2015 06:54
To: user@hadoop.apache.org
Subject: Re: hadoop not using whole disk for HDFS
Is there a maximum amount of disk space that HDFS will use? Is 100GB that max? When we’re supposed to be dealing with “big data” why is the amount of data to be held on any one box such a small number when you’ve got terabytes available?
Adaryl "Bob" Wakefield, MBA
Principal
Mass Street Analytics, LLC
913.938.6685
www.linkedin.com/in/bobwakefieldmba
Twitter: @BobLovesData
From: Adaryl "Bob" Wakefield, MBA
Sent: Wednesday, November 04, 2015 4:38 PM
To: user@hadoop.apache.org
Subject: Re: hadoop not using whole disk for HDFS
This is an experimental cluster and there isn’t anything I can’t lose. I ran into some issues. I’m running the Hortonworks distro and am managing things through Ambari.
1. I wasn’t able to set the config to /home/hdfs/data. I got an error that told me I’m not allowed to set that config to the /home directory. So I made it /hdfs/data.
2. When I restarted, the space available increased by a whopping 100GB.
Adaryl "Bob" Wakefield, MBA
Principal
Mass Street Analytics, LLC
913.938.6685
www.linkedin.com/in/bobwakefieldmba
Twitter: @BobLovesData
From: Naganarasimha G R (Naga)
Sent: Wednesday, November 04, 2015 4:26 PM
To: user@hadoop.apache.org
Subject: RE: hadoop not using whole disk for HDFS
Better would be to stop the daemons and copy the data from /hadoop/hdfs/data to /home/hdfs/data , reconfigure dfs.datanode.data.dir to /home/hdfs/data and then start the daemons. If the data is comparitively less !
Ensure you have the backup if have any critical data !
Regards,
+ Naga
--------------------------------------------------------------------------------
From: Adaryl "Bob" Wakefield, MBA [adaryl.wakefield@hotmail.com]
Sent: Thursday, November 05, 2015 03:40
To: user@hadoop.apache.org
Subject: Re: hadoop not using whole disk for HDFS
So like I can just create a new folder in the home directory like:
home/hdfs/data
and then set dfs.datanode.data.dir to:
/hadoop/hdfs/data,home/hdfs/data
Restart the node and that should do it correct?
Adaryl "Bob" Wakefield, MBA
Principal
Mass Street Analytics, LLC
913.938.6685
www.linkedin.com/in/bobwakefieldmba
Twitter: @BobLovesData
From: Naganarasimha G R (Naga)
Sent: Wednesday, November 04, 2015 3:59 PM
To: user@hadoop.apache.org
Subject: RE: hadoop not using whole disk for HDFS
Hi Bob,
Seems like you have configured to disk dir to be other than an folder in /home, if so try creating another folder and add to "dfs.datanode.data.dir" seperated by comma instead of trying to reset the default.
And its also advised not to use the root partition "/" to be configured for HDFS data dir, if the Dir usage hits the maximum then OS might fail to function properly.
Regards,
+ Naga
--------------------------------------------------------------------------------
From: P lva [ruvikal@gmail.com]
Sent: Thursday, November 05, 2015 03:11
To: user@hadoop.apache.org
Subject: Re: hadoop not using whole disk for HDFS
What does your dfs.datanode.data.dir point to ?
On Wed, Nov 4, 2015 at 4:14 PM, Adaryl "Bob" Wakefield, MBA <ad...@hotmail.com> wrote:
Filesystem Size Used Avail Use% Mounted on
/dev/mapper/centos-root 50G 12G 39G 23% /
devtmpfs 16G 0 16G 0% /dev
tmpfs 16G 0 16G 0% /dev/shm
tmpfs 16G 1.4G 15G 9% /run
tmpfs 16G 0 16G 0% /sys/fs/cgroup
/dev/sda2 494M 123M 372M 25% /boot
/dev/mapper/centos-home 2.7T 33M 2.7T 1% /home
That’s from one datanode. The second one is nearly identical. I discovered that 50GB is actually a default. That seems really weird. Disk space is cheap. Why would you not just use most of the disk and why is it so hard to reset the default?
Adaryl "Bob" Wakefield, MBA
Principal
Mass Street Analytics, LLC
913.938.6685
www.linkedin.com/in/bobwakefieldmba
Twitter: @BobLovesData
From: Chris Nauroth
Sent: Wednesday, November 04, 2015 12:16 PM
To: user@hadoop.apache.org
Subject: Re: hadoop not using whole disk for HDFS
How are those drives partitioned? Is it possible that the directories pointed to by the dfs.datanode.data.dir property in hdfs-site.xml reside on partitions that are sized to only 100 GB? Running commands like df would be a good way to check this at the OS level, independently of Hadoop.
--Chris Nauroth
From: MBA <ad...@hotmail.com>
Reply-To: "user@hadoop.apache.org" <us...@hadoop.apache.org>
Date: Tuesday, November 3, 2015 at 11:16 AM
To: "user@hadoop.apache.org" <us...@hadoop.apache.org>
Subject: Re: hadoop not using whole disk for HDFS
Yeah. It has the current value of 1073741824 which is like 1.07 gig.
B.
From: Chris Nauroth
Sent: Tuesday, November 03, 2015 11:57 AM
To: user@hadoop.apache.org
Subject: Re: hadoop not using whole disk for HDFS
Hi Bob,
Does the hdfs-site.xml configuration file contain the property dfs.datanode.du.reserved? If this is defined, then the DataNode intentionally will not use this space for storage of replicas.
<property>
<name>dfs.datanode.du.reserved</name>
<value>0</value>
<description>Reserved space in bytes per volume. Always leave this much space free for non dfs use.
</description>
</property>
--Chris Nauroth
From: MBA <ad...@hotmail.com>
Reply-To: "user@hadoop.apache.org" <us...@hadoop.apache.org>
Date: Tuesday, November 3, 2015 at 10:51 AM
To: "user@hadoop.apache.org" <us...@hadoop.apache.org>
Subject: hadoop not using whole disk for HDFS
I’ve got the Hortonworks distro running on a three node cluster. For some reason the disk available for HDFS is MUCH less than the total disk space. Both of my data nodes have 3TB hard drives. Only 100GB of that is being used for HDFS. Is it possible that I have a setting wrong somewhere?
B.
RE: hadoop not using whole disk for HDFS
Posted by Brahma Reddy Battula <br...@huawei.com>.
For each configured dfs.datanode.data.dir , HDFS thinks its in separate partiotion and counts the capacity separately. So when another dir is added /hdfs/data, HDFS thinks new partition is added, So it increased the capacity 50GB per node. i.e. 100GB for 2 Nodes.
Not allowing /home directory to configure for data.dir might be ambari's constraint, instead you can manually try to add a data dir in /home, for your usecase, and restart datanodes.
Thanks & Regards
Brahma Reddy Battula
________________________________
From: Naganarasimha G R (Naga) [garlanaganarasimha@huawei.com]
Sent: Friday, November 06, 2015 7:20 AM
To: user@hadoop.apache.org
Subject: RE: hadoop not using whole disk for HDFS
Hi Bob,
1. I wasn’t able to set the config to /home/hdfs/data. I got an error that told me I’m not allowed to set that config to the /home directory. So I made it /hdfs/data.
Naga : I am not sure about the HDP Distro but if you make it point to /hdfs/data, still it will be pointing to the root mount itself i.e.
/dev/mapper/centos-root 50G 12G 39G 23% /
Other Alternative is to mount the drive to some other folder other than /home and then try.
2. When I restarted, the space available increased by a whopping 100GB.
Naga : I am particularly not sure how this happened may be you can again recheck if you enter the command "df -h <path of the NM data dir configured>" you will find out how much disk space is available on the related mount for which the path is configured.
Regards,
+ Naga
________________________________
From: Adaryl "Bob" Wakefield, MBA [adaryl.wakefield@hotmail.com]
Sent: Friday, November 06, 2015 06:54
To: user@hadoop.apache.org
Subject: Re: hadoop not using whole disk for HDFS
Is there a maximum amount of disk space that HDFS will use? Is 100GB that max? When we’re supposed to be dealing with “big data” why is the amount of data to be held on any one box such a small number when you’ve got terabytes available?
Adaryl "Bob" Wakefield, MBA
Principal
Mass Street Analytics, LLC
913.938.6685
www.linkedin.com/in/bobwakefieldmba
Twitter: @BobLovesData
From: Adaryl "Bob" Wakefield, MBA<ma...@hotmail.com>
Sent: Wednesday, November 04, 2015 4:38 PM
To: user@hadoop.apache.org<ma...@hadoop.apache.org>
Subject: Re: hadoop not using whole disk for HDFS
This is an experimental cluster and there isn’t anything I can’t lose. I ran into some issues. I’m running the Hortonworks distro and am managing things through Ambari.
1. I wasn’t able to set the config to /home/hdfs/data. I got an error that told me I’m not allowed to set that config to the /home directory. So I made it /hdfs/data.
2. When I restarted, the space available increased by a whopping 100GB.
Adaryl "Bob" Wakefield, MBA
Principal
Mass Street Analytics, LLC
913.938.6685
www.linkedin.com/in/bobwakefieldmba
Twitter: @BobLovesData
From: Naganarasimha G R (Naga)<ma...@huawei.com>
Sent: Wednesday, November 04, 2015 4:26 PM
To: user@hadoop.apache.org<ma...@hadoop.apache.org>
Subject: RE: hadoop not using whole disk for HDFS
Better would be to stop the daemons and copy the data from /hadoop/hdfs/data to /home/hdfs/data , reconfigure dfs.datanode.data.dir to /home/hdfs/data and then start the daemons. If the data is comparitively less !
Ensure you have the backup if have any critical data !
Regards,
+ Naga
________________________________
From: Adaryl "Bob" Wakefield, MBA [adaryl.wakefield@hotmail.com]
Sent: Thursday, November 05, 2015 03:40
To: user@hadoop.apache.org
Subject: Re: hadoop not using whole disk for HDFS
So like I can just create a new folder in the home directory like:
home/hdfs/data
and then set dfs.datanode.data.dir to:
/hadoop/hdfs/data,home/hdfs/data
Restart the node and that should do it correct?
Adaryl "Bob" Wakefield, MBA
Principal
Mass Street Analytics, LLC
913.938.6685
www.linkedin.com/in/bobwakefieldmba
Twitter: @BobLovesData
From: Naganarasimha G R (Naga)<ma...@huawei.com>
Sent: Wednesday, November 04, 2015 3:59 PM
To: user@hadoop.apache.org<ma...@hadoop.apache.org>
Subject: RE: hadoop not using whole disk for HDFS
Hi Bob,
Seems like you have configured to disk dir to be other than an folder in /home, if so try creating another folder and add to "dfs.datanode.data.dir" seperated by comma instead of trying to reset the default.
And its also advised not to use the root partition "/" to be configured for HDFS data dir, if the Dir usage hits the maximum then OS might fail to function properly.
Regards,
+ Naga
________________________________
From: P lva [ruvikal@gmail.com]
Sent: Thursday, November 05, 2015 03:11
To: user@hadoop.apache.org
Subject: Re: hadoop not using whole disk for HDFS
What does your dfs.datanode.data.dir point to ?
On Wed, Nov 4, 2015 at 4:14 PM, Adaryl "Bob" Wakefield, MBA <ad...@hotmail.com>> wrote:
Filesystem Size Used Avail Use% Mounted on
/dev/mapper/centos-root 50G 12G 39G 23% /
devtmpfs 16G 0 16G 0% /dev
tmpfs 16G 0 16G 0% /dev/shm
tmpfs 16G 1.4G 15G 9% /run
tmpfs 16G 0 16G 0% /sys/fs/cgroup
/dev/sda2 494M 123M 372M 25% /boot
/dev/mapper/centos-home 2.7T 33M 2.7T 1% /home
That’s from one datanode. The second one is nearly identical. I discovered that 50GB is actually a default. That seems really weird. Disk space is cheap. Why would you not just use most of the disk and why is it so hard to reset the default?
Adaryl "Bob" Wakefield, MBA
Principal
Mass Street Analytics, LLC
913.938.6685<tel:913.938.6685>
www.linkedin.com/in/bobwakefieldmba<http://www.linkedin.com/in/bobwakefieldmba>
Twitter: @BobLovesData
From: Chris Nauroth<ma...@hortonworks.com>
Sent: Wednesday, November 04, 2015 12:16 PM
To: user@hadoop.apache.org<ma...@hadoop.apache.org>
Subject: Re: hadoop not using whole disk for HDFS
How are those drives partitioned? Is it possible that the directories pointed to by the dfs.datanode.data.dir property in hdfs-site.xml reside on partitions that are sized to only 100 GB? Running commands like df would be a good way to check this at the OS level, independently of Hadoop.
--Chris Nauroth
From: MBA <ad...@hotmail.com>>
Reply-To: "user@hadoop.apache.org<ma...@hadoop.apache.org>" <us...@hadoop.apache.org>>
Date: Tuesday, November 3, 2015 at 11:16 AM
To: "user@hadoop.apache.org<ma...@hadoop.apache.org>" <us...@hadoop.apache.org>>
Subject: Re: hadoop not using whole disk for HDFS
Yeah. It has the current value of 1073741824 which is like 1.07 gig.
B.
From: Chris Nauroth<ma...@hortonworks.com>
Sent: Tuesday, November 03, 2015 11:57 AM
To: user@hadoop.apache.org<ma...@hadoop.apache.org>
Subject: Re: hadoop not using whole disk for HDFS
Hi Bob,
Does the hdfs-site.xml configuration file contain the property dfs.datanode.du.reserved? If this is defined, then the DataNode intentionally will not use this space for storage of replicas.
<property>
<name>dfs.datanode.du.reserved</name>
<value>0</value>
<description>Reserved space in bytes per volume. Always leave this much space free for non dfs use.
</description>
</property>
--Chris Nauroth
From: MBA <ad...@hotmail.com>>
Reply-To: "user@hadoop.apache.org<ma...@hadoop.apache.org>" <us...@hadoop.apache.org>>
Date: Tuesday, November 3, 2015 at 10:51 AM
To: "user@hadoop.apache.org<ma...@hadoop.apache.org>" <us...@hadoop.apache.org>>
Subject: hadoop not using whole disk for HDFS
I’ve got the Hortonworks distro running on a three node cluster. For some reason the disk available for HDFS is MUCH less than the total disk space. Both of my data nodes have 3TB hard drives. Only 100GB of that is being used for HDFS. Is it possible that I have a setting wrong somewhere?
B.
Re: hadoop not using whole disk for HDFS
Posted by "Adaryl \"Bob\" Wakefield, MBA" <ad...@hotmail.com>.
I think it might help if I had a better understanding of what I’m looking at:
/dev/mapper/centos-home 2.7T 33M 2.7T 1% /home
So /dev/mapper/centos-home is the file system and /home is where it is mounted. I’m not sure I even know what that means. Are you saying that /hdfs/data even though it’s in root that it’s still somehow pointing to /home? So confused. It’s the part amount mounting a drive to another folder..on the same disk. Is it kind of like how on Windows you can have more than one “drive” on a disk?
Adaryl "Bob" Wakefield, MBA
Principal
Mass Street Analytics, LLC
913.938.6685
www.linkedin.com/in/bobwakefieldmba
Twitter: @BobLovesData
From: Naganarasimha G R (Naga)
Sent: Thursday, November 05, 2015 7:50 PM
To: user@hadoop.apache.org
Subject: RE: hadoop not using whole disk for HDFS
Hi Bob,
1. I wasn’t able to set the config to /home/hdfs/data. I got an error that told me I’m not allowed to set that config to the /home directory. So I made it /hdfs/data.
Naga : I am not sure about the HDP Distro but if you make it point to /hdfs/data, still it will be pointing to the root mount itself i.e.
/dev/mapper/centos-root 50G 12G 39G 23% /
Other Alternative is to mount the drive to some other folder other than /home and then try.
2. When I restarted, the space available increased by a whopping 100GB.
Naga : I am particularly not sure how this happened may be you can again recheck if you enter the command "df -h <path of the NM data dir configured>" you will find out how much disk space is available on the related mount for which the path is configured.
Regards,
+ Naga
--------------------------------------------------------------------------------
From: Adaryl "Bob" Wakefield, MBA [adaryl.wakefield@hotmail.com]
Sent: Friday, November 06, 2015 06:54
To: user@hadoop.apache.org
Subject: Re: hadoop not using whole disk for HDFS
Is there a maximum amount of disk space that HDFS will use? Is 100GB that max? When we’re supposed to be dealing with “big data” why is the amount of data to be held on any one box such a small number when you’ve got terabytes available?
Adaryl "Bob" Wakefield, MBA
Principal
Mass Street Analytics, LLC
913.938.6685
www.linkedin.com/in/bobwakefieldmba
Twitter: @BobLovesData
From: Adaryl "Bob" Wakefield, MBA
Sent: Wednesday, November 04, 2015 4:38 PM
To: user@hadoop.apache.org
Subject: Re: hadoop not using whole disk for HDFS
This is an experimental cluster and there isn’t anything I can’t lose. I ran into some issues. I’m running the Hortonworks distro and am managing things through Ambari.
1. I wasn’t able to set the config to /home/hdfs/data. I got an error that told me I’m not allowed to set that config to the /home directory. So I made it /hdfs/data.
2. When I restarted, the space available increased by a whopping 100GB.
Adaryl "Bob" Wakefield, MBA
Principal
Mass Street Analytics, LLC
913.938.6685
www.linkedin.com/in/bobwakefieldmba
Twitter: @BobLovesData
From: Naganarasimha G R (Naga)
Sent: Wednesday, November 04, 2015 4:26 PM
To: user@hadoop.apache.org
Subject: RE: hadoop not using whole disk for HDFS
Better would be to stop the daemons and copy the data from /hadoop/hdfs/data to /home/hdfs/data , reconfigure dfs.datanode.data.dir to /home/hdfs/data and then start the daemons. If the data is comparitively less !
Ensure you have the backup if have any critical data !
Regards,
+ Naga
--------------------------------------------------------------------------------
From: Adaryl "Bob" Wakefield, MBA [adaryl.wakefield@hotmail.com]
Sent: Thursday, November 05, 2015 03:40
To: user@hadoop.apache.org
Subject: Re: hadoop not using whole disk for HDFS
So like I can just create a new folder in the home directory like:
home/hdfs/data
and then set dfs.datanode.data.dir to:
/hadoop/hdfs/data,home/hdfs/data
Restart the node and that should do it correct?
Adaryl "Bob" Wakefield, MBA
Principal
Mass Street Analytics, LLC
913.938.6685
www.linkedin.com/in/bobwakefieldmba
Twitter: @BobLovesData
From: Naganarasimha G R (Naga)
Sent: Wednesday, November 04, 2015 3:59 PM
To: user@hadoop.apache.org
Subject: RE: hadoop not using whole disk for HDFS
Hi Bob,
Seems like you have configured to disk dir to be other than an folder in /home, if so try creating another folder and add to "dfs.datanode.data.dir" seperated by comma instead of trying to reset the default.
And its also advised not to use the root partition "/" to be configured for HDFS data dir, if the Dir usage hits the maximum then OS might fail to function properly.
Regards,
+ Naga
--------------------------------------------------------------------------------
From: P lva [ruvikal@gmail.com]
Sent: Thursday, November 05, 2015 03:11
To: user@hadoop.apache.org
Subject: Re: hadoop not using whole disk for HDFS
What does your dfs.datanode.data.dir point to ?
On Wed, Nov 4, 2015 at 4:14 PM, Adaryl "Bob" Wakefield, MBA <ad...@hotmail.com> wrote:
Filesystem Size Used Avail Use% Mounted on
/dev/mapper/centos-root 50G 12G 39G 23% /
devtmpfs 16G 0 16G 0% /dev
tmpfs 16G 0 16G 0% /dev/shm
tmpfs 16G 1.4G 15G 9% /run
tmpfs 16G 0 16G 0% /sys/fs/cgroup
/dev/sda2 494M 123M 372M 25% /boot
/dev/mapper/centos-home 2.7T 33M 2.7T 1% /home
That’s from one datanode. The second one is nearly identical. I discovered that 50GB is actually a default. That seems really weird. Disk space is cheap. Why would you not just use most of the disk and why is it so hard to reset the default?
Adaryl "Bob" Wakefield, MBA
Principal
Mass Street Analytics, LLC
913.938.6685
www.linkedin.com/in/bobwakefieldmba
Twitter: @BobLovesData
From: Chris Nauroth
Sent: Wednesday, November 04, 2015 12:16 PM
To: user@hadoop.apache.org
Subject: Re: hadoop not using whole disk for HDFS
How are those drives partitioned? Is it possible that the directories pointed to by the dfs.datanode.data.dir property in hdfs-site.xml reside on partitions that are sized to only 100 GB? Running commands like df would be a good way to check this at the OS level, independently of Hadoop.
--Chris Nauroth
From: MBA <ad...@hotmail.com>
Reply-To: "user@hadoop.apache.org" <us...@hadoop.apache.org>
Date: Tuesday, November 3, 2015 at 11:16 AM
To: "user@hadoop.apache.org" <us...@hadoop.apache.org>
Subject: Re: hadoop not using whole disk for HDFS
Yeah. It has the current value of 1073741824 which is like 1.07 gig.
B.
From: Chris Nauroth
Sent: Tuesday, November 03, 2015 11:57 AM
To: user@hadoop.apache.org
Subject: Re: hadoop not using whole disk for HDFS
Hi Bob,
Does the hdfs-site.xml configuration file contain the property dfs.datanode.du.reserved? If this is defined, then the DataNode intentionally will not use this space for storage of replicas.
<property>
<name>dfs.datanode.du.reserved</name>
<value>0</value>
<description>Reserved space in bytes per volume. Always leave this much space free for non dfs use.
</description>
</property>
--Chris Nauroth
From: MBA <ad...@hotmail.com>
Reply-To: "user@hadoop.apache.org" <us...@hadoop.apache.org>
Date: Tuesday, November 3, 2015 at 10:51 AM
To: "user@hadoop.apache.org" <us...@hadoop.apache.org>
Subject: hadoop not using whole disk for HDFS
I’ve got the Hortonworks distro running on a three node cluster. For some reason the disk available for HDFS is MUCH less than the total disk space. Both of my data nodes have 3TB hard drives. Only 100GB of that is being used for HDFS. Is it possible that I have a setting wrong somewhere?
B.
RE: hadoop not using whole disk for HDFS
Posted by Brahma Reddy Battula <br...@huawei.com>.
For each configured dfs.datanode.data.dir , HDFS thinks its in separate partiotion and counts the capacity separately. So when another dir is added /hdfs/data, HDFS thinks new partition is added, So it increased the capacity 50GB per node. i.e. 100GB for 2 Nodes.
Not allowing /home directory to configure for data.dir might be ambari's constraint, instead you can manually try to add a data dir in /home, for your usecase, and restart datanodes.
Thanks & Regards
Brahma Reddy Battula
________________________________
From: Naganarasimha G R (Naga) [garlanaganarasimha@huawei.com]
Sent: Friday, November 06, 2015 7:20 AM
To: user@hadoop.apache.org
Subject: RE: hadoop not using whole disk for HDFS
Hi Bob,
1. I wasn’t able to set the config to /home/hdfs/data. I got an error that told me I’m not allowed to set that config to the /home directory. So I made it /hdfs/data.
Naga : I am not sure about the HDP Distro but if you make it point to /hdfs/data, still it will be pointing to the root mount itself i.e.
/dev/mapper/centos-root 50G 12G 39G 23% /
Other Alternative is to mount the drive to some other folder other than /home and then try.
2. When I restarted, the space available increased by a whopping 100GB.
Naga : I am particularly not sure how this happened may be you can again recheck if you enter the command "df -h <path of the NM data dir configured>" you will find out how much disk space is available on the related mount for which the path is configured.
Regards,
+ Naga
________________________________
From: Adaryl "Bob" Wakefield, MBA [adaryl.wakefield@hotmail.com]
Sent: Friday, November 06, 2015 06:54
To: user@hadoop.apache.org
Subject: Re: hadoop not using whole disk for HDFS
Is there a maximum amount of disk space that HDFS will use? Is 100GB that max? When we’re supposed to be dealing with “big data” why is the amount of data to be held on any one box such a small number when you’ve got terabytes available?
Adaryl "Bob" Wakefield, MBA
Principal
Mass Street Analytics, LLC
913.938.6685
www.linkedin.com/in/bobwakefieldmba
Twitter: @BobLovesData
From: Adaryl "Bob" Wakefield, MBA<ma...@hotmail.com>
Sent: Wednesday, November 04, 2015 4:38 PM
To: user@hadoop.apache.org<ma...@hadoop.apache.org>
Subject: Re: hadoop not using whole disk for HDFS
This is an experimental cluster and there isn’t anything I can’t lose. I ran into some issues. I’m running the Hortonworks distro and am managing things through Ambari.
1. I wasn’t able to set the config to /home/hdfs/data. I got an error that told me I’m not allowed to set that config to the /home directory. So I made it /hdfs/data.
2. When I restarted, the space available increased by a whopping 100GB.
Adaryl "Bob" Wakefield, MBA
Principal
Mass Street Analytics, LLC
913.938.6685
www.linkedin.com/in/bobwakefieldmba
Twitter: @BobLovesData
From: Naganarasimha G R (Naga)<ma...@huawei.com>
Sent: Wednesday, November 04, 2015 4:26 PM
To: user@hadoop.apache.org<ma...@hadoop.apache.org>
Subject: RE: hadoop not using whole disk for HDFS
Better would be to stop the daemons and copy the data from /hadoop/hdfs/data to /home/hdfs/data , reconfigure dfs.datanode.data.dir to /home/hdfs/data and then start the daemons. If the data is comparitively less !
Ensure you have the backup if have any critical data !
Regards,
+ Naga
________________________________
From: Adaryl "Bob" Wakefield, MBA [adaryl.wakefield@hotmail.com]
Sent: Thursday, November 05, 2015 03:40
To: user@hadoop.apache.org
Subject: Re: hadoop not using whole disk for HDFS
So like I can just create a new folder in the home directory like:
home/hdfs/data
and then set dfs.datanode.data.dir to:
/hadoop/hdfs/data,home/hdfs/data
Restart the node and that should do it correct?
Adaryl "Bob" Wakefield, MBA
Principal
Mass Street Analytics, LLC
913.938.6685
www.linkedin.com/in/bobwakefieldmba
Twitter: @BobLovesData
From: Naganarasimha G R (Naga)<ma...@huawei.com>
Sent: Wednesday, November 04, 2015 3:59 PM
To: user@hadoop.apache.org<ma...@hadoop.apache.org>
Subject: RE: hadoop not using whole disk for HDFS
Hi Bob,
Seems like you have configured to disk dir to be other than an folder in /home, if so try creating another folder and add to "dfs.datanode.data.dir" seperated by comma instead of trying to reset the default.
And its also advised not to use the root partition "/" to be configured for HDFS data dir, if the Dir usage hits the maximum then OS might fail to function properly.
Regards,
+ Naga
________________________________
From: P lva [ruvikal@gmail.com]
Sent: Thursday, November 05, 2015 03:11
To: user@hadoop.apache.org
Subject: Re: hadoop not using whole disk for HDFS
What does your dfs.datanode.data.dir point to ?
On Wed, Nov 4, 2015 at 4:14 PM, Adaryl "Bob" Wakefield, MBA <ad...@hotmail.com>> wrote:
Filesystem Size Used Avail Use% Mounted on
/dev/mapper/centos-root 50G 12G 39G 23% /
devtmpfs 16G 0 16G 0% /dev
tmpfs 16G 0 16G 0% /dev/shm
tmpfs 16G 1.4G 15G 9% /run
tmpfs 16G 0 16G 0% /sys/fs/cgroup
/dev/sda2 494M 123M 372M 25% /boot
/dev/mapper/centos-home 2.7T 33M 2.7T 1% /home
That’s from one datanode. The second one is nearly identical. I discovered that 50GB is actually a default. That seems really weird. Disk space is cheap. Why would you not just use most of the disk and why is it so hard to reset the default?
Adaryl "Bob" Wakefield, MBA
Principal
Mass Street Analytics, LLC
913.938.6685<tel:913.938.6685>
www.linkedin.com/in/bobwakefieldmba<http://www.linkedin.com/in/bobwakefieldmba>
Twitter: @BobLovesData
From: Chris Nauroth<ma...@hortonworks.com>
Sent: Wednesday, November 04, 2015 12:16 PM
To: user@hadoop.apache.org<ma...@hadoop.apache.org>
Subject: Re: hadoop not using whole disk for HDFS
How are those drives partitioned? Is it possible that the directories pointed to by the dfs.datanode.data.dir property in hdfs-site.xml reside on partitions that are sized to only 100 GB? Running commands like df would be a good way to check this at the OS level, independently of Hadoop.
--Chris Nauroth
From: MBA <ad...@hotmail.com>>
Reply-To: "user@hadoop.apache.org<ma...@hadoop.apache.org>" <us...@hadoop.apache.org>>
Date: Tuesday, November 3, 2015 at 11:16 AM
To: "user@hadoop.apache.org<ma...@hadoop.apache.org>" <us...@hadoop.apache.org>>
Subject: Re: hadoop not using whole disk for HDFS
Yeah. It has the current value of 1073741824 which is like 1.07 gig.
B.
From: Chris Nauroth<ma...@hortonworks.com>
Sent: Tuesday, November 03, 2015 11:57 AM
To: user@hadoop.apache.org<ma...@hadoop.apache.org>
Subject: Re: hadoop not using whole disk for HDFS
Hi Bob,
Does the hdfs-site.xml configuration file contain the property dfs.datanode.du.reserved? If this is defined, then the DataNode intentionally will not use this space for storage of replicas.
<property>
<name>dfs.datanode.du.reserved</name>
<value>0</value>
<description>Reserved space in bytes per volume. Always leave this much space free for non dfs use.
</description>
</property>
--Chris Nauroth
From: MBA <ad...@hotmail.com>>
Reply-To: "user@hadoop.apache.org<ma...@hadoop.apache.org>" <us...@hadoop.apache.org>>
Date: Tuesday, November 3, 2015 at 10:51 AM
To: "user@hadoop.apache.org<ma...@hadoop.apache.org>" <us...@hadoop.apache.org>>
Subject: hadoop not using whole disk for HDFS
I’ve got the Hortonworks distro running on a three node cluster. For some reason the disk available for HDFS is MUCH less than the total disk space. Both of my data nodes have 3TB hard drives. Only 100GB of that is being used for HDFS. Is it possible that I have a setting wrong somewhere?
B.
RE: hadoop not using whole disk for HDFS
Posted by Brahma Reddy Battula <br...@huawei.com>.
For each configured dfs.datanode.data.dir , HDFS thinks its in separate partiotion and counts the capacity separately. So when another dir is added /hdfs/data, HDFS thinks new partition is added, So it increased the capacity 50GB per node. i.e. 100GB for 2 Nodes.
Not allowing /home directory to configure for data.dir might be ambari's constraint, instead you can manually try to add a data dir in /home, for your usecase, and restart datanodes.
Thanks & Regards
Brahma Reddy Battula
________________________________
From: Naganarasimha G R (Naga) [garlanaganarasimha@huawei.com]
Sent: Friday, November 06, 2015 7:20 AM
To: user@hadoop.apache.org
Subject: RE: hadoop not using whole disk for HDFS
Hi Bob,
1. I wasn’t able to set the config to /home/hdfs/data. I got an error that told me I’m not allowed to set that config to the /home directory. So I made it /hdfs/data.
Naga : I am not sure about the HDP Distro but if you make it point to /hdfs/data, still it will be pointing to the root mount itself i.e.
/dev/mapper/centos-root 50G 12G 39G 23% /
Other Alternative is to mount the drive to some other folder other than /home and then try.
2. When I restarted, the space available increased by a whopping 100GB.
Naga : I am particularly not sure how this happened may be you can again recheck if you enter the command "df -h <path of the NM data dir configured>" you will find out how much disk space is available on the related mount for which the path is configured.
Regards,
+ Naga
________________________________
From: Adaryl "Bob" Wakefield, MBA [adaryl.wakefield@hotmail.com]
Sent: Friday, November 06, 2015 06:54
To: user@hadoop.apache.org
Subject: Re: hadoop not using whole disk for HDFS
Is there a maximum amount of disk space that HDFS will use? Is 100GB that max? When we’re supposed to be dealing with “big data” why is the amount of data to be held on any one box such a small number when you’ve got terabytes available?
Adaryl "Bob" Wakefield, MBA
Principal
Mass Street Analytics, LLC
913.938.6685
www.linkedin.com/in/bobwakefieldmba
Twitter: @BobLovesData
From: Adaryl "Bob" Wakefield, MBA<ma...@hotmail.com>
Sent: Wednesday, November 04, 2015 4:38 PM
To: user@hadoop.apache.org<ma...@hadoop.apache.org>
Subject: Re: hadoop not using whole disk for HDFS
This is an experimental cluster and there isn’t anything I can’t lose. I ran into some issues. I’m running the Hortonworks distro and am managing things through Ambari.
1. I wasn’t able to set the config to /home/hdfs/data. I got an error that told me I’m not allowed to set that config to the /home directory. So I made it /hdfs/data.
2. When I restarted, the space available increased by a whopping 100GB.
Adaryl "Bob" Wakefield, MBA
Principal
Mass Street Analytics, LLC
913.938.6685
www.linkedin.com/in/bobwakefieldmba
Twitter: @BobLovesData
From: Naganarasimha G R (Naga)<ma...@huawei.com>
Sent: Wednesday, November 04, 2015 4:26 PM
To: user@hadoop.apache.org<ma...@hadoop.apache.org>
Subject: RE: hadoop not using whole disk for HDFS
Better would be to stop the daemons and copy the data from /hadoop/hdfs/data to /home/hdfs/data , reconfigure dfs.datanode.data.dir to /home/hdfs/data and then start the daemons. If the data is comparitively less !
Ensure you have the backup if have any critical data !
Regards,
+ Naga
________________________________
From: Adaryl "Bob" Wakefield, MBA [adaryl.wakefield@hotmail.com]
Sent: Thursday, November 05, 2015 03:40
To: user@hadoop.apache.org
Subject: Re: hadoop not using whole disk for HDFS
So like I can just create a new folder in the home directory like:
home/hdfs/data
and then set dfs.datanode.data.dir to:
/hadoop/hdfs/data,home/hdfs/data
Restart the node and that should do it correct?
Adaryl "Bob" Wakefield, MBA
Principal
Mass Street Analytics, LLC
913.938.6685
www.linkedin.com/in/bobwakefieldmba
Twitter: @BobLovesData
From: Naganarasimha G R (Naga)<ma...@huawei.com>
Sent: Wednesday, November 04, 2015 3:59 PM
To: user@hadoop.apache.org<ma...@hadoop.apache.org>
Subject: RE: hadoop not using whole disk for HDFS
Hi Bob,
Seems like you have configured to disk dir to be other than an folder in /home, if so try creating another folder and add to "dfs.datanode.data.dir" seperated by comma instead of trying to reset the default.
And its also advised not to use the root partition "/" to be configured for HDFS data dir, if the Dir usage hits the maximum then OS might fail to function properly.
Regards,
+ Naga
________________________________
From: P lva [ruvikal@gmail.com]
Sent: Thursday, November 05, 2015 03:11
To: user@hadoop.apache.org
Subject: Re: hadoop not using whole disk for HDFS
What does your dfs.datanode.data.dir point to ?
On Wed, Nov 4, 2015 at 4:14 PM, Adaryl "Bob" Wakefield, MBA <ad...@hotmail.com>> wrote:
Filesystem Size Used Avail Use% Mounted on
/dev/mapper/centos-root 50G 12G 39G 23% /
devtmpfs 16G 0 16G 0% /dev
tmpfs 16G 0 16G 0% /dev/shm
tmpfs 16G 1.4G 15G 9% /run
tmpfs 16G 0 16G 0% /sys/fs/cgroup
/dev/sda2 494M 123M 372M 25% /boot
/dev/mapper/centos-home 2.7T 33M 2.7T 1% /home
That’s from one datanode. The second one is nearly identical. I discovered that 50GB is actually a default. That seems really weird. Disk space is cheap. Why would you not just use most of the disk and why is it so hard to reset the default?
Adaryl "Bob" Wakefield, MBA
Principal
Mass Street Analytics, LLC
913.938.6685<tel:913.938.6685>
www.linkedin.com/in/bobwakefieldmba<http://www.linkedin.com/in/bobwakefieldmba>
Twitter: @BobLovesData
From: Chris Nauroth<ma...@hortonworks.com>
Sent: Wednesday, November 04, 2015 12:16 PM
To: user@hadoop.apache.org<ma...@hadoop.apache.org>
Subject: Re: hadoop not using whole disk for HDFS
How are those drives partitioned? Is it possible that the directories pointed to by the dfs.datanode.data.dir property in hdfs-site.xml reside on partitions that are sized to only 100 GB? Running commands like df would be a good way to check this at the OS level, independently of Hadoop.
--Chris Nauroth
From: MBA <ad...@hotmail.com>>
Reply-To: "user@hadoop.apache.org<ma...@hadoop.apache.org>" <us...@hadoop.apache.org>>
Date: Tuesday, November 3, 2015 at 11:16 AM
To: "user@hadoop.apache.org<ma...@hadoop.apache.org>" <us...@hadoop.apache.org>>
Subject: Re: hadoop not using whole disk for HDFS
Yeah. It has the current value of 1073741824 which is like 1.07 gig.
B.
From: Chris Nauroth<ma...@hortonworks.com>
Sent: Tuesday, November 03, 2015 11:57 AM
To: user@hadoop.apache.org<ma...@hadoop.apache.org>
Subject: Re: hadoop not using whole disk for HDFS
Hi Bob,
Does the hdfs-site.xml configuration file contain the property dfs.datanode.du.reserved? If this is defined, then the DataNode intentionally will not use this space for storage of replicas.
<property>
<name>dfs.datanode.du.reserved</name>
<value>0</value>
<description>Reserved space in bytes per volume. Always leave this much space free for non dfs use.
</description>
</property>
--Chris Nauroth
From: MBA <ad...@hotmail.com>>
Reply-To: "user@hadoop.apache.org<ma...@hadoop.apache.org>" <us...@hadoop.apache.org>>
Date: Tuesday, November 3, 2015 at 10:51 AM
To: "user@hadoop.apache.org<ma...@hadoop.apache.org>" <us...@hadoop.apache.org>>
Subject: hadoop not using whole disk for HDFS
I’ve got the Hortonworks distro running on a three node cluster. For some reason the disk available for HDFS is MUCH less than the total disk space. Both of my data nodes have 3TB hard drives. Only 100GB of that is being used for HDFS. Is it possible that I have a setting wrong somewhere?
B.
RE: hadoop not using whole disk for HDFS
Posted by Brahma Reddy Battula <br...@huawei.com>.
For each configured dfs.datanode.data.dir , HDFS thinks its in separate partiotion and counts the capacity separately. So when another dir is added /hdfs/data, HDFS thinks new partition is added, So it increased the capacity 50GB per node. i.e. 100GB for 2 Nodes.
Not allowing /home directory to configure for data.dir might be ambari's constraint, instead you can manually try to add a data dir in /home, for your usecase, and restart datanodes.
Thanks & Regards
Brahma Reddy Battula
________________________________
From: Naganarasimha G R (Naga) [garlanaganarasimha@huawei.com]
Sent: Friday, November 06, 2015 7:20 AM
To: user@hadoop.apache.org
Subject: RE: hadoop not using whole disk for HDFS
Hi Bob,
1. I wasn’t able to set the config to /home/hdfs/data. I got an error that told me I’m not allowed to set that config to the /home directory. So I made it /hdfs/data.
Naga : I am not sure about the HDP Distro but if you make it point to /hdfs/data, still it will be pointing to the root mount itself i.e.
/dev/mapper/centos-root 50G 12G 39G 23% /
Other Alternative is to mount the drive to some other folder other than /home and then try.
2. When I restarted, the space available increased by a whopping 100GB.
Naga : I am particularly not sure how this happened may be you can again recheck if you enter the command "df -h <path of the NM data dir configured>" you will find out how much disk space is available on the related mount for which the path is configured.
Regards,
+ Naga
________________________________
From: Adaryl "Bob" Wakefield, MBA [adaryl.wakefield@hotmail.com]
Sent: Friday, November 06, 2015 06:54
To: user@hadoop.apache.org
Subject: Re: hadoop not using whole disk for HDFS
Is there a maximum amount of disk space that HDFS will use? Is 100GB that max? When we’re supposed to be dealing with “big data” why is the amount of data to be held on any one box such a small number when you’ve got terabytes available?
Adaryl "Bob" Wakefield, MBA
Principal
Mass Street Analytics, LLC
913.938.6685
www.linkedin.com/in/bobwakefieldmba
Twitter: @BobLovesData
From: Adaryl "Bob" Wakefield, MBA<ma...@hotmail.com>
Sent: Wednesday, November 04, 2015 4:38 PM
To: user@hadoop.apache.org<ma...@hadoop.apache.org>
Subject: Re: hadoop not using whole disk for HDFS
This is an experimental cluster and there isn’t anything I can’t lose. I ran into some issues. I’m running the Hortonworks distro and am managing things through Ambari.
1. I wasn’t able to set the config to /home/hdfs/data. I got an error that told me I’m not allowed to set that config to the /home directory. So I made it /hdfs/data.
2. When I restarted, the space available increased by a whopping 100GB.
Adaryl "Bob" Wakefield, MBA
Principal
Mass Street Analytics, LLC
913.938.6685
www.linkedin.com/in/bobwakefieldmba
Twitter: @BobLovesData
From: Naganarasimha G R (Naga)<ma...@huawei.com>
Sent: Wednesday, November 04, 2015 4:26 PM
To: user@hadoop.apache.org<ma...@hadoop.apache.org>
Subject: RE: hadoop not using whole disk for HDFS
Better would be to stop the daemons and copy the data from /hadoop/hdfs/data to /home/hdfs/data , reconfigure dfs.datanode.data.dir to /home/hdfs/data and then start the daemons. If the data is comparitively less !
Ensure you have the backup if have any critical data !
Regards,
+ Naga
________________________________
From: Adaryl "Bob" Wakefield, MBA [adaryl.wakefield@hotmail.com]
Sent: Thursday, November 05, 2015 03:40
To: user@hadoop.apache.org
Subject: Re: hadoop not using whole disk for HDFS
So like I can just create a new folder in the home directory like:
home/hdfs/data
and then set dfs.datanode.data.dir to:
/hadoop/hdfs/data,home/hdfs/data
Restart the node and that should do it correct?
Adaryl "Bob" Wakefield, MBA
Principal
Mass Street Analytics, LLC
913.938.6685
www.linkedin.com/in/bobwakefieldmba
Twitter: @BobLovesData
From: Naganarasimha G R (Naga)<ma...@huawei.com>
Sent: Wednesday, November 04, 2015 3:59 PM
To: user@hadoop.apache.org<ma...@hadoop.apache.org>
Subject: RE: hadoop not using whole disk for HDFS
Hi Bob,
Seems like you have configured to disk dir to be other than an folder in /home, if so try creating another folder and add to "dfs.datanode.data.dir" seperated by comma instead of trying to reset the default.
And its also advised not to use the root partition "/" to be configured for HDFS data dir, if the Dir usage hits the maximum then OS might fail to function properly.
Regards,
+ Naga
________________________________
From: P lva [ruvikal@gmail.com]
Sent: Thursday, November 05, 2015 03:11
To: user@hadoop.apache.org
Subject: Re: hadoop not using whole disk for HDFS
What does your dfs.datanode.data.dir point to ?
On Wed, Nov 4, 2015 at 4:14 PM, Adaryl "Bob" Wakefield, MBA <ad...@hotmail.com>> wrote:
Filesystem Size Used Avail Use% Mounted on
/dev/mapper/centos-root 50G 12G 39G 23% /
devtmpfs 16G 0 16G 0% /dev
tmpfs 16G 0 16G 0% /dev/shm
tmpfs 16G 1.4G 15G 9% /run
tmpfs 16G 0 16G 0% /sys/fs/cgroup
/dev/sda2 494M 123M 372M 25% /boot
/dev/mapper/centos-home 2.7T 33M 2.7T 1% /home
That’s from one datanode. The second one is nearly identical. I discovered that 50GB is actually a default. That seems really weird. Disk space is cheap. Why would you not just use most of the disk and why is it so hard to reset the default?
Adaryl "Bob" Wakefield, MBA
Principal
Mass Street Analytics, LLC
913.938.6685<tel:913.938.6685>
www.linkedin.com/in/bobwakefieldmba<http://www.linkedin.com/in/bobwakefieldmba>
Twitter: @BobLovesData
From: Chris Nauroth<ma...@hortonworks.com>
Sent: Wednesday, November 04, 2015 12:16 PM
To: user@hadoop.apache.org<ma...@hadoop.apache.org>
Subject: Re: hadoop not using whole disk for HDFS
How are those drives partitioned? Is it possible that the directories pointed to by the dfs.datanode.data.dir property in hdfs-site.xml reside on partitions that are sized to only 100 GB? Running commands like df would be a good way to check this at the OS level, independently of Hadoop.
--Chris Nauroth
From: MBA <ad...@hotmail.com>>
Reply-To: "user@hadoop.apache.org<ma...@hadoop.apache.org>" <us...@hadoop.apache.org>>
Date: Tuesday, November 3, 2015 at 11:16 AM
To: "user@hadoop.apache.org<ma...@hadoop.apache.org>" <us...@hadoop.apache.org>>
Subject: Re: hadoop not using whole disk for HDFS
Yeah. It has the current value of 1073741824 which is like 1.07 gig.
B.
From: Chris Nauroth<ma...@hortonworks.com>
Sent: Tuesday, November 03, 2015 11:57 AM
To: user@hadoop.apache.org<ma...@hadoop.apache.org>
Subject: Re: hadoop not using whole disk for HDFS
Hi Bob,
Does the hdfs-site.xml configuration file contain the property dfs.datanode.du.reserved? If this is defined, then the DataNode intentionally will not use this space for storage of replicas.
<property>
<name>dfs.datanode.du.reserved</name>
<value>0</value>
<description>Reserved space in bytes per volume. Always leave this much space free for non dfs use.
</description>
</property>
--Chris Nauroth
From: MBA <ad...@hotmail.com>>
Reply-To: "user@hadoop.apache.org<ma...@hadoop.apache.org>" <us...@hadoop.apache.org>>
Date: Tuesday, November 3, 2015 at 10:51 AM
To: "user@hadoop.apache.org<ma...@hadoop.apache.org>" <us...@hadoop.apache.org>>
Subject: hadoop not using whole disk for HDFS
I’ve got the Hortonworks distro running on a three node cluster. For some reason the disk available for HDFS is MUCH less than the total disk space. Both of my data nodes have 3TB hard drives. Only 100GB of that is being used for HDFS. Is it possible that I have a setting wrong somewhere?
B.
Re: hadoop not using whole disk for HDFS
Posted by "Adaryl \"Bob\" Wakefield, MBA" <ad...@hotmail.com>.
I think it might help if I had a better understanding of what I’m looking at:
/dev/mapper/centos-home 2.7T 33M 2.7T 1% /home
So /dev/mapper/centos-home is the file system and /home is where it is mounted. I’m not sure I even know what that means. Are you saying that /hdfs/data even though it’s in root that it’s still somehow pointing to /home? So confused. It’s the part amount mounting a drive to another folder..on the same disk. Is it kind of like how on Windows you can have more than one “drive” on a disk?
Adaryl "Bob" Wakefield, MBA
Principal
Mass Street Analytics, LLC
913.938.6685
www.linkedin.com/in/bobwakefieldmba
Twitter: @BobLovesData
From: Naganarasimha G R (Naga)
Sent: Thursday, November 05, 2015 7:50 PM
To: user@hadoop.apache.org
Subject: RE: hadoop not using whole disk for HDFS
Hi Bob,
1. I wasn’t able to set the config to /home/hdfs/data. I got an error that told me I’m not allowed to set that config to the /home directory. So I made it /hdfs/data.
Naga : I am not sure about the HDP Distro but if you make it point to /hdfs/data, still it will be pointing to the root mount itself i.e.
/dev/mapper/centos-root 50G 12G 39G 23% /
Other Alternative is to mount the drive to some other folder other than /home and then try.
2. When I restarted, the space available increased by a whopping 100GB.
Naga : I am particularly not sure how this happened may be you can again recheck if you enter the command "df -h <path of the NM data dir configured>" you will find out how much disk space is available on the related mount for which the path is configured.
Regards,
+ Naga
--------------------------------------------------------------------------------
From: Adaryl "Bob" Wakefield, MBA [adaryl.wakefield@hotmail.com]
Sent: Friday, November 06, 2015 06:54
To: user@hadoop.apache.org
Subject: Re: hadoop not using whole disk for HDFS
Is there a maximum amount of disk space that HDFS will use? Is 100GB that max? When we’re supposed to be dealing with “big data” why is the amount of data to be held on any one box such a small number when you’ve got terabytes available?
Adaryl "Bob" Wakefield, MBA
Principal
Mass Street Analytics, LLC
913.938.6685
www.linkedin.com/in/bobwakefieldmba
Twitter: @BobLovesData
From: Adaryl "Bob" Wakefield, MBA
Sent: Wednesday, November 04, 2015 4:38 PM
To: user@hadoop.apache.org
Subject: Re: hadoop not using whole disk for HDFS
This is an experimental cluster and there isn’t anything I can’t lose. I ran into some issues. I’m running the Hortonworks distro and am managing things through Ambari.
1. I wasn’t able to set the config to /home/hdfs/data. I got an error that told me I’m not allowed to set that config to the /home directory. So I made it /hdfs/data.
2. When I restarted, the space available increased by a whopping 100GB.
Adaryl "Bob" Wakefield, MBA
Principal
Mass Street Analytics, LLC
913.938.6685
www.linkedin.com/in/bobwakefieldmba
Twitter: @BobLovesData
From: Naganarasimha G R (Naga)
Sent: Wednesday, November 04, 2015 4:26 PM
To: user@hadoop.apache.org
Subject: RE: hadoop not using whole disk for HDFS
Better would be to stop the daemons and copy the data from /hadoop/hdfs/data to /home/hdfs/data , reconfigure dfs.datanode.data.dir to /home/hdfs/data and then start the daemons. If the data is comparitively less !
Ensure you have the backup if have any critical data !
Regards,
+ Naga
--------------------------------------------------------------------------------
From: Adaryl "Bob" Wakefield, MBA [adaryl.wakefield@hotmail.com]
Sent: Thursday, November 05, 2015 03:40
To: user@hadoop.apache.org
Subject: Re: hadoop not using whole disk for HDFS
So like I can just create a new folder in the home directory like:
home/hdfs/data
and then set dfs.datanode.data.dir to:
/hadoop/hdfs/data,home/hdfs/data
Restart the node and that should do it correct?
Adaryl "Bob" Wakefield, MBA
Principal
Mass Street Analytics, LLC
913.938.6685
www.linkedin.com/in/bobwakefieldmba
Twitter: @BobLovesData
From: Naganarasimha G R (Naga)
Sent: Wednesday, November 04, 2015 3:59 PM
To: user@hadoop.apache.org
Subject: RE: hadoop not using whole disk for HDFS
Hi Bob,
Seems like you have configured to disk dir to be other than an folder in /home, if so try creating another folder and add to "dfs.datanode.data.dir" seperated by comma instead of trying to reset the default.
And its also advised not to use the root partition "/" to be configured for HDFS data dir, if the Dir usage hits the maximum then OS might fail to function properly.
Regards,
+ Naga
--------------------------------------------------------------------------------
From: P lva [ruvikal@gmail.com]
Sent: Thursday, November 05, 2015 03:11
To: user@hadoop.apache.org
Subject: Re: hadoop not using whole disk for HDFS
What does your dfs.datanode.data.dir point to ?
On Wed, Nov 4, 2015 at 4:14 PM, Adaryl "Bob" Wakefield, MBA <ad...@hotmail.com> wrote:
Filesystem Size Used Avail Use% Mounted on
/dev/mapper/centos-root 50G 12G 39G 23% /
devtmpfs 16G 0 16G 0% /dev
tmpfs 16G 0 16G 0% /dev/shm
tmpfs 16G 1.4G 15G 9% /run
tmpfs 16G 0 16G 0% /sys/fs/cgroup
/dev/sda2 494M 123M 372M 25% /boot
/dev/mapper/centos-home 2.7T 33M 2.7T 1% /home
That’s from one datanode. The second one is nearly identical. I discovered that 50GB is actually a default. That seems really weird. Disk space is cheap. Why would you not just use most of the disk and why is it so hard to reset the default?
Adaryl "Bob" Wakefield, MBA
Principal
Mass Street Analytics, LLC
913.938.6685
www.linkedin.com/in/bobwakefieldmba
Twitter: @BobLovesData
From: Chris Nauroth
Sent: Wednesday, November 04, 2015 12:16 PM
To: user@hadoop.apache.org
Subject: Re: hadoop not using whole disk for HDFS
How are those drives partitioned? Is it possible that the directories pointed to by the dfs.datanode.data.dir property in hdfs-site.xml reside on partitions that are sized to only 100 GB? Running commands like df would be a good way to check this at the OS level, independently of Hadoop.
--Chris Nauroth
From: MBA <ad...@hotmail.com>
Reply-To: "user@hadoop.apache.org" <us...@hadoop.apache.org>
Date: Tuesday, November 3, 2015 at 11:16 AM
To: "user@hadoop.apache.org" <us...@hadoop.apache.org>
Subject: Re: hadoop not using whole disk for HDFS
Yeah. It has the current value of 1073741824 which is like 1.07 gig.
B.
From: Chris Nauroth
Sent: Tuesday, November 03, 2015 11:57 AM
To: user@hadoop.apache.org
Subject: Re: hadoop not using whole disk for HDFS
Hi Bob,
Does the hdfs-site.xml configuration file contain the property dfs.datanode.du.reserved? If this is defined, then the DataNode intentionally will not use this space for storage of replicas.
<property>
<name>dfs.datanode.du.reserved</name>
<value>0</value>
<description>Reserved space in bytes per volume. Always leave this much space free for non dfs use.
</description>
</property>
--Chris Nauroth
From: MBA <ad...@hotmail.com>
Reply-To: "user@hadoop.apache.org" <us...@hadoop.apache.org>
Date: Tuesday, November 3, 2015 at 10:51 AM
To: "user@hadoop.apache.org" <us...@hadoop.apache.org>
Subject: hadoop not using whole disk for HDFS
I’ve got the Hortonworks distro running on a three node cluster. For some reason the disk available for HDFS is MUCH less than the total disk space. Both of my data nodes have 3TB hard drives. Only 100GB of that is being used for HDFS. Is it possible that I have a setting wrong somewhere?
B.
RE: hadoop not using whole disk for HDFS
Posted by "Naganarasimha G R (Naga)" <ga...@huawei.com>.
Hi Bob,
1. I wasn’t able to set the config to /home/hdfs/data. I got an error that told me I’m not allowed to set that config to the /home directory. So I made it /hdfs/data.
Naga : I am not sure about the HDP Distro but if you make it point to /hdfs/data, still it will be pointing to the root mount itself i.e.
/dev/mapper/centos-root 50G 12G 39G 23% /
Other Alternative is to mount the drive to some other folder other than /home and then try.
2. When I restarted, the space available increased by a whopping 100GB.
Naga : I am particularly not sure how this happened may be you can again recheck if you enter the command "df -h <path of the NM data dir configured>" you will find out how much disk space is available on the related mount for which the path is configured.
Regards,
+ Naga
________________________________
From: Adaryl "Bob" Wakefield, MBA [adaryl.wakefield@hotmail.com]
Sent: Friday, November 06, 2015 06:54
To: user@hadoop.apache.org
Subject: Re: hadoop not using whole disk for HDFS
Is there a maximum amount of disk space that HDFS will use? Is 100GB that max? When we’re supposed to be dealing with “big data” why is the amount of data to be held on any one box such a small number when you’ve got terabytes available?
Adaryl "Bob" Wakefield, MBA
Principal
Mass Street Analytics, LLC
913.938.6685
www.linkedin.com/in/bobwakefieldmba
Twitter: @BobLovesData
From: Adaryl "Bob" Wakefield, MBA<ma...@hotmail.com>
Sent: Wednesday, November 04, 2015 4:38 PM
To: user@hadoop.apache.org<ma...@hadoop.apache.org>
Subject: Re: hadoop not using whole disk for HDFS
This is an experimental cluster and there isn’t anything I can’t lose. I ran into some issues. I’m running the Hortonworks distro and am managing things through Ambari.
1. I wasn’t able to set the config to /home/hdfs/data. I got an error that told me I’m not allowed to set that config to the /home directory. So I made it /hdfs/data.
2. When I restarted, the space available increased by a whopping 100GB.
Adaryl "Bob" Wakefield, MBA
Principal
Mass Street Analytics, LLC
913.938.6685
www.linkedin.com/in/bobwakefieldmba
Twitter: @BobLovesData
From: Naganarasimha G R (Naga)<ma...@huawei.com>
Sent: Wednesday, November 04, 2015 4:26 PM
To: user@hadoop.apache.org<ma...@hadoop.apache.org>
Subject: RE: hadoop not using whole disk for HDFS
Better would be to stop the daemons and copy the data from /hadoop/hdfs/data to /home/hdfs/data , reconfigure dfs.datanode.data.dir to /home/hdfs/data and then start the daemons. If the data is comparitively less !
Ensure you have the backup if have any critical data !
Regards,
+ Naga
________________________________
From: Adaryl "Bob" Wakefield, MBA [adaryl.wakefield@hotmail.com]
Sent: Thursday, November 05, 2015 03:40
To: user@hadoop.apache.org
Subject: Re: hadoop not using whole disk for HDFS
So like I can just create a new folder in the home directory like:
home/hdfs/data
and then set dfs.datanode.data.dir to:
/hadoop/hdfs/data,home/hdfs/data
Restart the node and that should do it correct?
Adaryl "Bob" Wakefield, MBA
Principal
Mass Street Analytics, LLC
913.938.6685
www.linkedin.com/in/bobwakefieldmba
Twitter: @BobLovesData
From: Naganarasimha G R (Naga)<ma...@huawei.com>
Sent: Wednesday, November 04, 2015 3:59 PM
To: user@hadoop.apache.org<ma...@hadoop.apache.org>
Subject: RE: hadoop not using whole disk for HDFS
Hi Bob,
Seems like you have configured to disk dir to be other than an folder in /home, if so try creating another folder and add to "dfs.datanode.data.dir" seperated by comma instead of trying to reset the default.
And its also advised not to use the root partition "/" to be configured for HDFS data dir, if the Dir usage hits the maximum then OS might fail to function properly.
Regards,
+ Naga
________________________________
From: P lva [ruvikal@gmail.com]
Sent: Thursday, November 05, 2015 03:11
To: user@hadoop.apache.org
Subject: Re: hadoop not using whole disk for HDFS
What does your dfs.datanode.data.dir point to ?
On Wed, Nov 4, 2015 at 4:14 PM, Adaryl "Bob" Wakefield, MBA <ad...@hotmail.com>> wrote:
Filesystem Size Used Avail Use% Mounted on
/dev/mapper/centos-root 50G 12G 39G 23% /
devtmpfs 16G 0 16G 0% /dev
tmpfs 16G 0 16G 0% /dev/shm
tmpfs 16G 1.4G 15G 9% /run
tmpfs 16G 0 16G 0% /sys/fs/cgroup
/dev/sda2 494M 123M 372M 25% /boot
/dev/mapper/centos-home 2.7T 33M 2.7T 1% /home
That’s from one datanode. The second one is nearly identical. I discovered that 50GB is actually a default. That seems really weird. Disk space is cheap. Why would you not just use most of the disk and why is it so hard to reset the default?
Adaryl "Bob" Wakefield, MBA
Principal
Mass Street Analytics, LLC
913.938.6685<tel:913.938.6685>
www.linkedin.com/in/bobwakefieldmba<http://www.linkedin.com/in/bobwakefieldmba>
Twitter: @BobLovesData
From: Chris Nauroth<ma...@hortonworks.com>
Sent: Wednesday, November 04, 2015 12:16 PM
To: user@hadoop.apache.org<ma...@hadoop.apache.org>
Subject: Re: hadoop not using whole disk for HDFS
How are those drives partitioned? Is it possible that the directories pointed to by the dfs.datanode.data.dir property in hdfs-site.xml reside on partitions that are sized to only 100 GB? Running commands like df would be a good way to check this at the OS level, independently of Hadoop.
--Chris Nauroth
From: MBA <ad...@hotmail.com>>
Reply-To: "user@hadoop.apache.org<ma...@hadoop.apache.org>" <us...@hadoop.apache.org>>
Date: Tuesday, November 3, 2015 at 11:16 AM
To: "user@hadoop.apache.org<ma...@hadoop.apache.org>" <us...@hadoop.apache.org>>
Subject: Re: hadoop not using whole disk for HDFS
Yeah. It has the current value of 1073741824 which is like 1.07 gig.
B.
From: Chris Nauroth<ma...@hortonworks.com>
Sent: Tuesday, November 03, 2015 11:57 AM
To: user@hadoop.apache.org<ma...@hadoop.apache.org>
Subject: Re: hadoop not using whole disk for HDFS
Hi Bob,
Does the hdfs-site.xml configuration file contain the property dfs.datanode.du.reserved? If this is defined, then the DataNode intentionally will not use this space for storage of replicas.
<property>
<name>dfs.datanode.du.reserved</name>
<value>0</value>
<description>Reserved space in bytes per volume. Always leave this much space free for non dfs use.
</description>
</property>
--Chris Nauroth
From: MBA <ad...@hotmail.com>>
Reply-To: "user@hadoop.apache.org<ma...@hadoop.apache.org>" <us...@hadoop.apache.org>>
Date: Tuesday, November 3, 2015 at 10:51 AM
To: "user@hadoop.apache.org<ma...@hadoop.apache.org>" <us...@hadoop.apache.org>>
Subject: hadoop not using whole disk for HDFS
I’ve got the Hortonworks distro running on a three node cluster. For some reason the disk available for HDFS is MUCH less than the total disk space. Both of my data nodes have 3TB hard drives. Only 100GB of that is being used for HDFS. Is it possible that I have a setting wrong somewhere?
B.
Re: hadoop not using whole disk for HDFS
Posted by iain wright <ia...@gmail.com>.
Please post:
- output of df -h from every datanode in your cluster
- what dfs.datanode.data.dir is currently set too
--
Iain Wright
This email message is confidential, intended only for the recipient(s)
named above and may contain information that is privileged, exempt from
disclosure under applicable law. If you are not the intended recipient, do
not disclose or disseminate the message to anyone except the intended
recipient. If you have received this message in error, or are not the named
recipient(s), please immediately notify the sender by return email, and
delete all copies of this message.
On Thu, Nov 5, 2015 at 5:24 PM, Adaryl "Bob" Wakefield, MBA <
adaryl.wakefield@hotmail.com> wrote:
> Is there a maximum amount of disk space that HDFS will use? Is 100GB that
> max? When we’re supposed to be dealing with “big data” why is the amount of
> data to be held on any one box such a small number when you’ve got
> terabytes available?
>
> Adaryl "Bob" Wakefield, MBA
> Principal
> Mass Street Analytics, LLC
> 913.938.6685
> www.linkedin.com/in/bobwakefieldmba
> Twitter: @BobLovesData
>
> *From:* Adaryl "Bob" Wakefield, MBA <ad...@hotmail.com>
> *Sent:* Wednesday, November 04, 2015 4:38 PM
> *To:* user@hadoop.apache.org
> *Subject:* Re: hadoop not using whole disk for HDFS
>
> This is an experimental cluster and there isn’t anything I can’t lose. I
> ran into some issues. I’m running the Hortonworks distro and am managing
> things through Ambari.
>
> 1. I wasn’t able to set the config to /home/hdfs/data. I got an error that
> told me I’m not allowed to set that config to the /home directory. So I
> made it /hdfs/data.
> 2. When I restarted, the space available increased by a whopping 100GB.
>
>
>
> Adaryl "Bob" Wakefield, MBA
> Principal
> Mass Street Analytics, LLC
> 913.938.6685
> www.linkedin.com/in/bobwakefieldmba
> Twitter: @BobLovesData
>
> *From:* Naganarasimha G R (Naga) <ga...@huawei.com>
> *Sent:* Wednesday, November 04, 2015 4:26 PM
> *To:* user@hadoop.apache.org
> *Subject:* RE: hadoop not using whole disk for HDFS
>
>
> Better would be to stop the daemons and copy the data from */hadoop/hdfs/data
> *to */home/hdfs/data *, reconfigure *dfs.datanode.data.dir* to */home/hdfs/data
> *and then start the daemons. If the data is comparitively less !
>
> Ensure you have the backup if have any critical data !
>
>
>
> Regards,
>
> + Naga
> ------------------------------
> *From:* Adaryl "Bob" Wakefield, MBA [adaryl.wakefield@hotmail.com]
> *Sent:* Thursday, November 05, 2015 03:40
> *To:* user@hadoop.apache.org
> *Subject:* Re: hadoop not using whole disk for HDFS
>
> So like I can just create a new folder in the home directory like:
> home/hdfs/data
> and then set dfs.datanode.data.dir to:
> /hadoop/hdfs/data,home/hdfs/data
>
> Restart the node and that should do it correct?
>
> Adaryl "Bob" Wakefield, MBA
> Principal
> Mass Street Analytics, LLC
> 913.938.6685
> www.linkedin.com/in/bobwakefieldmba
> Twitter: @BobLovesData
>
> *From:* Naganarasimha G R (Naga) <ga...@huawei.com>
> *Sent:* Wednesday, November 04, 2015 3:59 PM
> *To:* user@hadoop.apache.org
> *Subject:* RE: hadoop not using whole disk for HDFS
>
>
> Hi Bob,
>
>
>
> Seems like you have configured to disk dir to be other than an folder in*
> /home,* if so try creating another folder and add to
> *"dfs.datanode.data.dir"* seperated by comma instead of trying to reset
> the default.
>
> And its also advised not to use the root partition "/" to be configured
> for HDFS data dir, if the Dir usage hits the maximum then OS might fail to
> function properly.
>
>
>
> Regards,
>
> + Naga
> ------------------------------
> *From:* P lva [ruvikal@gmail.com]
> *Sent:* Thursday, November 05, 2015 03:11
> *To:* user@hadoop.apache.org
> *Subject:* Re: hadoop not using whole disk for HDFS
>
> What does your dfs.datanode.data.dir point to ?
>
>
> On Wed, Nov 4, 2015 at 4:14 PM, Adaryl "Bob" Wakefield, MBA <
> adaryl.wakefield@hotmail.com> wrote:
>
>> Filesystem Size Used Avail Use% Mounted on /dev/mapper/centos-root 50G
>> 12G 39G 23% / devtmpfs 16G 0 16G 0% /dev tmpfs 16G 0 16G 0% /dev/shm
>> tmpfs 16G 1.4G 15G 9% /run tmpfs 16G 0 16G 0% /sys/fs/cgroup /dev/sda2
>> 494M 123M 372M 25% /boot /dev/mapper/centos-home 2.7T 33M 2.7T 1% /home
>>
>> That’s from one datanode. The second one is nearly identical. I
>> discovered that 50GB is actually a default. That seems really weird. Disk
>> space is cheap. Why would you not just use most of the disk and why is it
>> so hard to reset the default?
>>
>> Adaryl "Bob" Wakefield, MBA
>> Principal
>> Mass Street Analytics, LLC
>> 913.938.6685
>> www.linkedin.com/in/bobwakefieldmba
>> Twitter: @BobLovesData
>>
>> *From:* Chris Nauroth <cn...@hortonworks.com>
>> *Sent:* Wednesday, November 04, 2015 12:16 PM
>> *To:* user@hadoop.apache.org
>> *Subject:* Re: hadoop not using whole disk for HDFS
>>
>> How are those drives partitioned? Is it possible that the directories
>> pointed to by the dfs.datanode.data.dir property in hdfs-site.xml reside on
>> partitions that are sized to only 100 GB? Running commands like df would
>> be a good way to check this at the OS level, independently of Hadoop.
>>
>> --Chris Nauroth
>>
>> From: MBA <ad...@hotmail.com>
>> Reply-To: "user@hadoop.apache.org" <us...@hadoop.apache.org>
>> Date: Tuesday, November 3, 2015 at 11:16 AM
>> To: "user@hadoop.apache.org" <us...@hadoop.apache.org>
>> Subject: Re: hadoop not using whole disk for HDFS
>>
>> Yeah. It has the current value of 1073741824 which is like 1.07 gig.
>>
>> B.
>> *From:* Chris Nauroth <cn...@hortonworks.com>
>> *Sent:* Tuesday, November 03, 2015 11:57 AM
>> *To:* user@hadoop.apache.org
>> *Subject:* Re: hadoop not using whole disk for HDFS
>>
>> Hi Bob,
>>
>> Does the hdfs-site.xml configuration file contain the property
>> dfs.datanode.du.reserved? If this is defined, then the DataNode
>> intentionally will not use this space for storage of replicas.
>>
>> <property>
>> <name>dfs.datanode.du.reserved</name>
>> <value>0</value>
>> <description>Reserved space in bytes per volume. Always leave this much
>> space free for non dfs use.
>> </description>
>> </property>
>>
>> --Chris Nauroth
>>
>> From: MBA <ad...@hotmail.com>
>> Reply-To: "user@hadoop.apache.org" <us...@hadoop.apache.org>
>> Date: Tuesday, November 3, 2015 at 10:51 AM
>> To: "user@hadoop.apache.org" <us...@hadoop.apache.org>
>> Subject: hadoop not using whole disk for HDFS
>>
>> I’ve got the Hortonworks distro running on a three node cluster. For some
>> reason the disk available for HDFS is MUCH less than the total disk space.
>> Both of my data nodes have 3TB hard drives. Only 100GB of that is being
>> used for HDFS. Is it possible that I have a setting wrong somewhere?
>>
>> B.
>>
>
>
Re: hadoop not using whole disk for HDFS
Posted by iain wright <ia...@gmail.com>.
Please post:
- output of df -h from every datanode in your cluster
- what dfs.datanode.data.dir is currently set too
--
Iain Wright
This email message is confidential, intended only for the recipient(s)
named above and may contain information that is privileged, exempt from
disclosure under applicable law. If you are not the intended recipient, do
not disclose or disseminate the message to anyone except the intended
recipient. If you have received this message in error, or are not the named
recipient(s), please immediately notify the sender by return email, and
delete all copies of this message.
On Thu, Nov 5, 2015 at 5:24 PM, Adaryl "Bob" Wakefield, MBA <
adaryl.wakefield@hotmail.com> wrote:
> Is there a maximum amount of disk space that HDFS will use? Is 100GB that
> max? When we’re supposed to be dealing with “big data” why is the amount of
> data to be held on any one box such a small number when you’ve got
> terabytes available?
>
> Adaryl "Bob" Wakefield, MBA
> Principal
> Mass Street Analytics, LLC
> 913.938.6685
> www.linkedin.com/in/bobwakefieldmba
> Twitter: @BobLovesData
>
> *From:* Adaryl "Bob" Wakefield, MBA <ad...@hotmail.com>
> *Sent:* Wednesday, November 04, 2015 4:38 PM
> *To:* user@hadoop.apache.org
> *Subject:* Re: hadoop not using whole disk for HDFS
>
> This is an experimental cluster and there isn’t anything I can’t lose. I
> ran into some issues. I’m running the Hortonworks distro and am managing
> things through Ambari.
>
> 1. I wasn’t able to set the config to /home/hdfs/data. I got an error that
> told me I’m not allowed to set that config to the /home directory. So I
> made it /hdfs/data.
> 2. When I restarted, the space available increased by a whopping 100GB.
>
>
>
> Adaryl "Bob" Wakefield, MBA
> Principal
> Mass Street Analytics, LLC
> 913.938.6685
> www.linkedin.com/in/bobwakefieldmba
> Twitter: @BobLovesData
>
> *From:* Naganarasimha G R (Naga) <ga...@huawei.com>
> *Sent:* Wednesday, November 04, 2015 4:26 PM
> *To:* user@hadoop.apache.org
> *Subject:* RE: hadoop not using whole disk for HDFS
>
>
> Better would be to stop the daemons and copy the data from */hadoop/hdfs/data
> *to */home/hdfs/data *, reconfigure *dfs.datanode.data.dir* to */home/hdfs/data
> *and then start the daemons. If the data is comparitively less !
>
> Ensure you have the backup if have any critical data !
>
>
>
> Regards,
>
> + Naga
> ------------------------------
> *From:* Adaryl "Bob" Wakefield, MBA [adaryl.wakefield@hotmail.com]
> *Sent:* Thursday, November 05, 2015 03:40
> *To:* user@hadoop.apache.org
> *Subject:* Re: hadoop not using whole disk for HDFS
>
> So like I can just create a new folder in the home directory like:
> home/hdfs/data
> and then set dfs.datanode.data.dir to:
> /hadoop/hdfs/data,home/hdfs/data
>
> Restart the node and that should do it correct?
>
> Adaryl "Bob" Wakefield, MBA
> Principal
> Mass Street Analytics, LLC
> 913.938.6685
> www.linkedin.com/in/bobwakefieldmba
> Twitter: @BobLovesData
>
> *From:* Naganarasimha G R (Naga) <ga...@huawei.com>
> *Sent:* Wednesday, November 04, 2015 3:59 PM
> *To:* user@hadoop.apache.org
> *Subject:* RE: hadoop not using whole disk for HDFS
>
>
> Hi Bob,
>
>
>
> Seems like you have configured to disk dir to be other than an folder in*
> /home,* if so try creating another folder and add to
> *"dfs.datanode.data.dir"* seperated by comma instead of trying to reset
> the default.
>
> And its also advised not to use the root partition "/" to be configured
> for HDFS data dir, if the Dir usage hits the maximum then OS might fail to
> function properly.
>
>
>
> Regards,
>
> + Naga
> ------------------------------
> *From:* P lva [ruvikal@gmail.com]
> *Sent:* Thursday, November 05, 2015 03:11
> *To:* user@hadoop.apache.org
> *Subject:* Re: hadoop not using whole disk for HDFS
>
> What does your dfs.datanode.data.dir point to ?
>
>
> On Wed, Nov 4, 2015 at 4:14 PM, Adaryl "Bob" Wakefield, MBA <
> adaryl.wakefield@hotmail.com> wrote:
>
>> Filesystem Size Used Avail Use% Mounted on /dev/mapper/centos-root 50G
>> 12G 39G 23% / devtmpfs 16G 0 16G 0% /dev tmpfs 16G 0 16G 0% /dev/shm
>> tmpfs 16G 1.4G 15G 9% /run tmpfs 16G 0 16G 0% /sys/fs/cgroup /dev/sda2
>> 494M 123M 372M 25% /boot /dev/mapper/centos-home 2.7T 33M 2.7T 1% /home
>>
>> That’s from one datanode. The second one is nearly identical. I
>> discovered that 50GB is actually a default. That seems really weird. Disk
>> space is cheap. Why would you not just use most of the disk and why is it
>> so hard to reset the default?
>>
>> Adaryl "Bob" Wakefield, MBA
>> Principal
>> Mass Street Analytics, LLC
>> 913.938.6685
>> www.linkedin.com/in/bobwakefieldmba
>> Twitter: @BobLovesData
>>
>> *From:* Chris Nauroth <cn...@hortonworks.com>
>> *Sent:* Wednesday, November 04, 2015 12:16 PM
>> *To:* user@hadoop.apache.org
>> *Subject:* Re: hadoop not using whole disk for HDFS
>>
>> How are those drives partitioned? Is it possible that the directories
>> pointed to by the dfs.datanode.data.dir property in hdfs-site.xml reside on
>> partitions that are sized to only 100 GB? Running commands like df would
>> be a good way to check this at the OS level, independently of Hadoop.
>>
>> --Chris Nauroth
>>
>> From: MBA <ad...@hotmail.com>
>> Reply-To: "user@hadoop.apache.org" <us...@hadoop.apache.org>
>> Date: Tuesday, November 3, 2015 at 11:16 AM
>> To: "user@hadoop.apache.org" <us...@hadoop.apache.org>
>> Subject: Re: hadoop not using whole disk for HDFS
>>
>> Yeah. It has the current value of 1073741824 which is like 1.07 gig.
>>
>> B.
>> *From:* Chris Nauroth <cn...@hortonworks.com>
>> *Sent:* Tuesday, November 03, 2015 11:57 AM
>> *To:* user@hadoop.apache.org
>> *Subject:* Re: hadoop not using whole disk for HDFS
>>
>> Hi Bob,
>>
>> Does the hdfs-site.xml configuration file contain the property
>> dfs.datanode.du.reserved? If this is defined, then the DataNode
>> intentionally will not use this space for storage of replicas.
>>
>> <property>
>> <name>dfs.datanode.du.reserved</name>
>> <value>0</value>
>> <description>Reserved space in bytes per volume. Always leave this much
>> space free for non dfs use.
>> </description>
>> </property>
>>
>> --Chris Nauroth
>>
>> From: MBA <ad...@hotmail.com>
>> Reply-To: "user@hadoop.apache.org" <us...@hadoop.apache.org>
>> Date: Tuesday, November 3, 2015 at 10:51 AM
>> To: "user@hadoop.apache.org" <us...@hadoop.apache.org>
>> Subject: hadoop not using whole disk for HDFS
>>
>> I’ve got the Hortonworks distro running on a three node cluster. For some
>> reason the disk available for HDFS is MUCH less than the total disk space.
>> Both of my data nodes have 3TB hard drives. Only 100GB of that is being
>> used for HDFS. Is it possible that I have a setting wrong somewhere?
>>
>> B.
>>
>
>
RE: hadoop not using whole disk for HDFS
Posted by "Naganarasimha G R (Naga)" <ga...@huawei.com>.
Hi Bob,
1. I wasn’t able to set the config to /home/hdfs/data. I got an error that told me I’m not allowed to set that config to the /home directory. So I made it /hdfs/data.
Naga : I am not sure about the HDP Distro but if you make it point to /hdfs/data, still it will be pointing to the root mount itself i.e.
/dev/mapper/centos-root 50G 12G 39G 23% /
Other Alternative is to mount the drive to some other folder other than /home and then try.
2. When I restarted, the space available increased by a whopping 100GB.
Naga : I am particularly not sure how this happened may be you can again recheck if you enter the command "df -h <path of the NM data dir configured>" you will find out how much disk space is available on the related mount for which the path is configured.
Regards,
+ Naga
________________________________
From: Adaryl "Bob" Wakefield, MBA [adaryl.wakefield@hotmail.com]
Sent: Friday, November 06, 2015 06:54
To: user@hadoop.apache.org
Subject: Re: hadoop not using whole disk for HDFS
Is there a maximum amount of disk space that HDFS will use? Is 100GB that max? When we’re supposed to be dealing with “big data” why is the amount of data to be held on any one box such a small number when you’ve got terabytes available?
Adaryl "Bob" Wakefield, MBA
Principal
Mass Street Analytics, LLC
913.938.6685
www.linkedin.com/in/bobwakefieldmba
Twitter: @BobLovesData
From: Adaryl "Bob" Wakefield, MBA<ma...@hotmail.com>
Sent: Wednesday, November 04, 2015 4:38 PM
To: user@hadoop.apache.org<ma...@hadoop.apache.org>
Subject: Re: hadoop not using whole disk for HDFS
This is an experimental cluster and there isn’t anything I can’t lose. I ran into some issues. I’m running the Hortonworks distro and am managing things through Ambari.
1. I wasn’t able to set the config to /home/hdfs/data. I got an error that told me I’m not allowed to set that config to the /home directory. So I made it /hdfs/data.
2. When I restarted, the space available increased by a whopping 100GB.
Adaryl "Bob" Wakefield, MBA
Principal
Mass Street Analytics, LLC
913.938.6685
www.linkedin.com/in/bobwakefieldmba
Twitter: @BobLovesData
From: Naganarasimha G R (Naga)<ma...@huawei.com>
Sent: Wednesday, November 04, 2015 4:26 PM
To: user@hadoop.apache.org<ma...@hadoop.apache.org>
Subject: RE: hadoop not using whole disk for HDFS
Better would be to stop the daemons and copy the data from /hadoop/hdfs/data to /home/hdfs/data , reconfigure dfs.datanode.data.dir to /home/hdfs/data and then start the daemons. If the data is comparitively less !
Ensure you have the backup if have any critical data !
Regards,
+ Naga
________________________________
From: Adaryl "Bob" Wakefield, MBA [adaryl.wakefield@hotmail.com]
Sent: Thursday, November 05, 2015 03:40
To: user@hadoop.apache.org
Subject: Re: hadoop not using whole disk for HDFS
So like I can just create a new folder in the home directory like:
home/hdfs/data
and then set dfs.datanode.data.dir to:
/hadoop/hdfs/data,home/hdfs/data
Restart the node and that should do it correct?
Adaryl "Bob" Wakefield, MBA
Principal
Mass Street Analytics, LLC
913.938.6685
www.linkedin.com/in/bobwakefieldmba
Twitter: @BobLovesData
From: Naganarasimha G R (Naga)<ma...@huawei.com>
Sent: Wednesday, November 04, 2015 3:59 PM
To: user@hadoop.apache.org<ma...@hadoop.apache.org>
Subject: RE: hadoop not using whole disk for HDFS
Hi Bob,
Seems like you have configured to disk dir to be other than an folder in /home, if so try creating another folder and add to "dfs.datanode.data.dir" seperated by comma instead of trying to reset the default.
And its also advised not to use the root partition "/" to be configured for HDFS data dir, if the Dir usage hits the maximum then OS might fail to function properly.
Regards,
+ Naga
________________________________
From: P lva [ruvikal@gmail.com]
Sent: Thursday, November 05, 2015 03:11
To: user@hadoop.apache.org
Subject: Re: hadoop not using whole disk for HDFS
What does your dfs.datanode.data.dir point to ?
On Wed, Nov 4, 2015 at 4:14 PM, Adaryl "Bob" Wakefield, MBA <ad...@hotmail.com>> wrote:
Filesystem Size Used Avail Use% Mounted on
/dev/mapper/centos-root 50G 12G 39G 23% /
devtmpfs 16G 0 16G 0% /dev
tmpfs 16G 0 16G 0% /dev/shm
tmpfs 16G 1.4G 15G 9% /run
tmpfs 16G 0 16G 0% /sys/fs/cgroup
/dev/sda2 494M 123M 372M 25% /boot
/dev/mapper/centos-home 2.7T 33M 2.7T 1% /home
That’s from one datanode. The second one is nearly identical. I discovered that 50GB is actually a default. That seems really weird. Disk space is cheap. Why would you not just use most of the disk and why is it so hard to reset the default?
Adaryl "Bob" Wakefield, MBA
Principal
Mass Street Analytics, LLC
913.938.6685<tel:913.938.6685>
www.linkedin.com/in/bobwakefieldmba<http://www.linkedin.com/in/bobwakefieldmba>
Twitter: @BobLovesData
From: Chris Nauroth<ma...@hortonworks.com>
Sent: Wednesday, November 04, 2015 12:16 PM
To: user@hadoop.apache.org<ma...@hadoop.apache.org>
Subject: Re: hadoop not using whole disk for HDFS
How are those drives partitioned? Is it possible that the directories pointed to by the dfs.datanode.data.dir property in hdfs-site.xml reside on partitions that are sized to only 100 GB? Running commands like df would be a good way to check this at the OS level, independently of Hadoop.
--Chris Nauroth
From: MBA <ad...@hotmail.com>>
Reply-To: "user@hadoop.apache.org<ma...@hadoop.apache.org>" <us...@hadoop.apache.org>>
Date: Tuesday, November 3, 2015 at 11:16 AM
To: "user@hadoop.apache.org<ma...@hadoop.apache.org>" <us...@hadoop.apache.org>>
Subject: Re: hadoop not using whole disk for HDFS
Yeah. It has the current value of 1073741824 which is like 1.07 gig.
B.
From: Chris Nauroth<ma...@hortonworks.com>
Sent: Tuesday, November 03, 2015 11:57 AM
To: user@hadoop.apache.org<ma...@hadoop.apache.org>
Subject: Re: hadoop not using whole disk for HDFS
Hi Bob,
Does the hdfs-site.xml configuration file contain the property dfs.datanode.du.reserved? If this is defined, then the DataNode intentionally will not use this space for storage of replicas.
<property>
<name>dfs.datanode.du.reserved</name>
<value>0</value>
<description>Reserved space in bytes per volume. Always leave this much space free for non dfs use.
</description>
</property>
--Chris Nauroth
From: MBA <ad...@hotmail.com>>
Reply-To: "user@hadoop.apache.org<ma...@hadoop.apache.org>" <us...@hadoop.apache.org>>
Date: Tuesday, November 3, 2015 at 10:51 AM
To: "user@hadoop.apache.org<ma...@hadoop.apache.org>" <us...@hadoop.apache.org>>
Subject: hadoop not using whole disk for HDFS
I’ve got the Hortonworks distro running on a three node cluster. For some reason the disk available for HDFS is MUCH less than the total disk space. Both of my data nodes have 3TB hard drives. Only 100GB of that is being used for HDFS. Is it possible that I have a setting wrong somewhere?
B.
Re: hadoop not using whole disk for HDFS
Posted by iain wright <ia...@gmail.com>.
Please post:
- output of df -h from every datanode in your cluster
- what dfs.datanode.data.dir is currently set too
--
Iain Wright
This email message is confidential, intended only for the recipient(s)
named above and may contain information that is privileged, exempt from
disclosure under applicable law. If you are not the intended recipient, do
not disclose or disseminate the message to anyone except the intended
recipient. If you have received this message in error, or are not the named
recipient(s), please immediately notify the sender by return email, and
delete all copies of this message.
On Thu, Nov 5, 2015 at 5:24 PM, Adaryl "Bob" Wakefield, MBA <
adaryl.wakefield@hotmail.com> wrote:
> Is there a maximum amount of disk space that HDFS will use? Is 100GB that
> max? When we’re supposed to be dealing with “big data” why is the amount of
> data to be held on any one box such a small number when you’ve got
> terabytes available?
>
> Adaryl "Bob" Wakefield, MBA
> Principal
> Mass Street Analytics, LLC
> 913.938.6685
> www.linkedin.com/in/bobwakefieldmba
> Twitter: @BobLovesData
>
> *From:* Adaryl "Bob" Wakefield, MBA <ad...@hotmail.com>
> *Sent:* Wednesday, November 04, 2015 4:38 PM
> *To:* user@hadoop.apache.org
> *Subject:* Re: hadoop not using whole disk for HDFS
>
> This is an experimental cluster and there isn’t anything I can’t lose. I
> ran into some issues. I’m running the Hortonworks distro and am managing
> things through Ambari.
>
> 1. I wasn’t able to set the config to /home/hdfs/data. I got an error that
> told me I’m not allowed to set that config to the /home directory. So I
> made it /hdfs/data.
> 2. When I restarted, the space available increased by a whopping 100GB.
>
>
>
> Adaryl "Bob" Wakefield, MBA
> Principal
> Mass Street Analytics, LLC
> 913.938.6685
> www.linkedin.com/in/bobwakefieldmba
> Twitter: @BobLovesData
>
> *From:* Naganarasimha G R (Naga) <ga...@huawei.com>
> *Sent:* Wednesday, November 04, 2015 4:26 PM
> *To:* user@hadoop.apache.org
> *Subject:* RE: hadoop not using whole disk for HDFS
>
>
> Better would be to stop the daemons and copy the data from */hadoop/hdfs/data
> *to */home/hdfs/data *, reconfigure *dfs.datanode.data.dir* to */home/hdfs/data
> *and then start the daemons. If the data is comparitively less !
>
> Ensure you have the backup if have any critical data !
>
>
>
> Regards,
>
> + Naga
> ------------------------------
> *From:* Adaryl "Bob" Wakefield, MBA [adaryl.wakefield@hotmail.com]
> *Sent:* Thursday, November 05, 2015 03:40
> *To:* user@hadoop.apache.org
> *Subject:* Re: hadoop not using whole disk for HDFS
>
> So like I can just create a new folder in the home directory like:
> home/hdfs/data
> and then set dfs.datanode.data.dir to:
> /hadoop/hdfs/data,home/hdfs/data
>
> Restart the node and that should do it correct?
>
> Adaryl "Bob" Wakefield, MBA
> Principal
> Mass Street Analytics, LLC
> 913.938.6685
> www.linkedin.com/in/bobwakefieldmba
> Twitter: @BobLovesData
>
> *From:* Naganarasimha G R (Naga) <ga...@huawei.com>
> *Sent:* Wednesday, November 04, 2015 3:59 PM
> *To:* user@hadoop.apache.org
> *Subject:* RE: hadoop not using whole disk for HDFS
>
>
> Hi Bob,
>
>
>
> Seems like you have configured to disk dir to be other than an folder in*
> /home,* if so try creating another folder and add to
> *"dfs.datanode.data.dir"* seperated by comma instead of trying to reset
> the default.
>
> And its also advised not to use the root partition "/" to be configured
> for HDFS data dir, if the Dir usage hits the maximum then OS might fail to
> function properly.
>
>
>
> Regards,
>
> + Naga
> ------------------------------
> *From:* P lva [ruvikal@gmail.com]
> *Sent:* Thursday, November 05, 2015 03:11
> *To:* user@hadoop.apache.org
> *Subject:* Re: hadoop not using whole disk for HDFS
>
> What does your dfs.datanode.data.dir point to ?
>
>
> On Wed, Nov 4, 2015 at 4:14 PM, Adaryl "Bob" Wakefield, MBA <
> adaryl.wakefield@hotmail.com> wrote:
>
>> Filesystem Size Used Avail Use% Mounted on /dev/mapper/centos-root 50G
>> 12G 39G 23% / devtmpfs 16G 0 16G 0% /dev tmpfs 16G 0 16G 0% /dev/shm
>> tmpfs 16G 1.4G 15G 9% /run tmpfs 16G 0 16G 0% /sys/fs/cgroup /dev/sda2
>> 494M 123M 372M 25% /boot /dev/mapper/centos-home 2.7T 33M 2.7T 1% /home
>>
>> That’s from one datanode. The second one is nearly identical. I
>> discovered that 50GB is actually a default. That seems really weird. Disk
>> space is cheap. Why would you not just use most of the disk and why is it
>> so hard to reset the default?
>>
>> Adaryl "Bob" Wakefield, MBA
>> Principal
>> Mass Street Analytics, LLC
>> 913.938.6685
>> www.linkedin.com/in/bobwakefieldmba
>> Twitter: @BobLovesData
>>
>> *From:* Chris Nauroth <cn...@hortonworks.com>
>> *Sent:* Wednesday, November 04, 2015 12:16 PM
>> *To:* user@hadoop.apache.org
>> *Subject:* Re: hadoop not using whole disk for HDFS
>>
>> How are those drives partitioned? Is it possible that the directories
>> pointed to by the dfs.datanode.data.dir property in hdfs-site.xml reside on
>> partitions that are sized to only 100 GB? Running commands like df would
>> be a good way to check this at the OS level, independently of Hadoop.
>>
>> --Chris Nauroth
>>
>> From: MBA <ad...@hotmail.com>
>> Reply-To: "user@hadoop.apache.org" <us...@hadoop.apache.org>
>> Date: Tuesday, November 3, 2015 at 11:16 AM
>> To: "user@hadoop.apache.org" <us...@hadoop.apache.org>
>> Subject: Re: hadoop not using whole disk for HDFS
>>
>> Yeah. It has the current value of 1073741824 which is like 1.07 gig.
>>
>> B.
>> *From:* Chris Nauroth <cn...@hortonworks.com>
>> *Sent:* Tuesday, November 03, 2015 11:57 AM
>> *To:* user@hadoop.apache.org
>> *Subject:* Re: hadoop not using whole disk for HDFS
>>
>> Hi Bob,
>>
>> Does the hdfs-site.xml configuration file contain the property
>> dfs.datanode.du.reserved? If this is defined, then the DataNode
>> intentionally will not use this space for storage of replicas.
>>
>> <property>
>> <name>dfs.datanode.du.reserved</name>
>> <value>0</value>
>> <description>Reserved space in bytes per volume. Always leave this much
>> space free for non dfs use.
>> </description>
>> </property>
>>
>> --Chris Nauroth
>>
>> From: MBA <ad...@hotmail.com>
>> Reply-To: "user@hadoop.apache.org" <us...@hadoop.apache.org>
>> Date: Tuesday, November 3, 2015 at 10:51 AM
>> To: "user@hadoop.apache.org" <us...@hadoop.apache.org>
>> Subject: hadoop not using whole disk for HDFS
>>
>> I’ve got the Hortonworks distro running on a three node cluster. For some
>> reason the disk available for HDFS is MUCH less than the total disk space.
>> Both of my data nodes have 3TB hard drives. Only 100GB of that is being
>> used for HDFS. Is it possible that I have a setting wrong somewhere?
>>
>> B.
>>
>
>
RE: hadoop not using whole disk for HDFS
Posted by "Naganarasimha G R (Naga)" <ga...@huawei.com>.
Hi Bob,
1. I wasn’t able to set the config to /home/hdfs/data. I got an error that told me I’m not allowed to set that config to the /home directory. So I made it /hdfs/data.
Naga : I am not sure about the HDP Distro but if you make it point to /hdfs/data, still it will be pointing to the root mount itself i.e.
/dev/mapper/centos-root 50G 12G 39G 23% /
Other Alternative is to mount the drive to some other folder other than /home and then try.
2. When I restarted, the space available increased by a whopping 100GB.
Naga : I am particularly not sure how this happened may be you can again recheck if you enter the command "df -h <path of the NM data dir configured>" you will find out how much disk space is available on the related mount for which the path is configured.
Regards,
+ Naga
________________________________
From: Adaryl "Bob" Wakefield, MBA [adaryl.wakefield@hotmail.com]
Sent: Friday, November 06, 2015 06:54
To: user@hadoop.apache.org
Subject: Re: hadoop not using whole disk for HDFS
Is there a maximum amount of disk space that HDFS will use? Is 100GB that max? When we’re supposed to be dealing with “big data” why is the amount of data to be held on any one box such a small number when you’ve got terabytes available?
Adaryl "Bob" Wakefield, MBA
Principal
Mass Street Analytics, LLC
913.938.6685
www.linkedin.com/in/bobwakefieldmba
Twitter: @BobLovesData
From: Adaryl "Bob" Wakefield, MBA<ma...@hotmail.com>
Sent: Wednesday, November 04, 2015 4:38 PM
To: user@hadoop.apache.org<ma...@hadoop.apache.org>
Subject: Re: hadoop not using whole disk for HDFS
This is an experimental cluster and there isn’t anything I can’t lose. I ran into some issues. I’m running the Hortonworks distro and am managing things through Ambari.
1. I wasn’t able to set the config to /home/hdfs/data. I got an error that told me I’m not allowed to set that config to the /home directory. So I made it /hdfs/data.
2. When I restarted, the space available increased by a whopping 100GB.
Adaryl "Bob" Wakefield, MBA
Principal
Mass Street Analytics, LLC
913.938.6685
www.linkedin.com/in/bobwakefieldmba
Twitter: @BobLovesData
From: Naganarasimha G R (Naga)<ma...@huawei.com>
Sent: Wednesday, November 04, 2015 4:26 PM
To: user@hadoop.apache.org<ma...@hadoop.apache.org>
Subject: RE: hadoop not using whole disk for HDFS
Better would be to stop the daemons and copy the data from /hadoop/hdfs/data to /home/hdfs/data , reconfigure dfs.datanode.data.dir to /home/hdfs/data and then start the daemons. If the data is comparitively less !
Ensure you have the backup if have any critical data !
Regards,
+ Naga
________________________________
From: Adaryl "Bob" Wakefield, MBA [adaryl.wakefield@hotmail.com]
Sent: Thursday, November 05, 2015 03:40
To: user@hadoop.apache.org
Subject: Re: hadoop not using whole disk for HDFS
So like I can just create a new folder in the home directory like:
home/hdfs/data
and then set dfs.datanode.data.dir to:
/hadoop/hdfs/data,home/hdfs/data
Restart the node and that should do it correct?
Adaryl "Bob" Wakefield, MBA
Principal
Mass Street Analytics, LLC
913.938.6685
www.linkedin.com/in/bobwakefieldmba
Twitter: @BobLovesData
From: Naganarasimha G R (Naga)<ma...@huawei.com>
Sent: Wednesday, November 04, 2015 3:59 PM
To: user@hadoop.apache.org<ma...@hadoop.apache.org>
Subject: RE: hadoop not using whole disk for HDFS
Hi Bob,
Seems like you have configured to disk dir to be other than an folder in /home, if so try creating another folder and add to "dfs.datanode.data.dir" seperated by comma instead of trying to reset the default.
And its also advised not to use the root partition "/" to be configured for HDFS data dir, if the Dir usage hits the maximum then OS might fail to function properly.
Regards,
+ Naga
________________________________
From: P lva [ruvikal@gmail.com]
Sent: Thursday, November 05, 2015 03:11
To: user@hadoop.apache.org
Subject: Re: hadoop not using whole disk for HDFS
What does your dfs.datanode.data.dir point to ?
On Wed, Nov 4, 2015 at 4:14 PM, Adaryl "Bob" Wakefield, MBA <ad...@hotmail.com>> wrote:
Filesystem Size Used Avail Use% Mounted on
/dev/mapper/centos-root 50G 12G 39G 23% /
devtmpfs 16G 0 16G 0% /dev
tmpfs 16G 0 16G 0% /dev/shm
tmpfs 16G 1.4G 15G 9% /run
tmpfs 16G 0 16G 0% /sys/fs/cgroup
/dev/sda2 494M 123M 372M 25% /boot
/dev/mapper/centos-home 2.7T 33M 2.7T 1% /home
That’s from one datanode. The second one is nearly identical. I discovered that 50GB is actually a default. That seems really weird. Disk space is cheap. Why would you not just use most of the disk and why is it so hard to reset the default?
Adaryl "Bob" Wakefield, MBA
Principal
Mass Street Analytics, LLC
913.938.6685<tel:913.938.6685>
www.linkedin.com/in/bobwakefieldmba<http://www.linkedin.com/in/bobwakefieldmba>
Twitter: @BobLovesData
From: Chris Nauroth<ma...@hortonworks.com>
Sent: Wednesday, November 04, 2015 12:16 PM
To: user@hadoop.apache.org<ma...@hadoop.apache.org>
Subject: Re: hadoop not using whole disk for HDFS
How are those drives partitioned? Is it possible that the directories pointed to by the dfs.datanode.data.dir property in hdfs-site.xml reside on partitions that are sized to only 100 GB? Running commands like df would be a good way to check this at the OS level, independently of Hadoop.
--Chris Nauroth
From: MBA <ad...@hotmail.com>>
Reply-To: "user@hadoop.apache.org<ma...@hadoop.apache.org>" <us...@hadoop.apache.org>>
Date: Tuesday, November 3, 2015 at 11:16 AM
To: "user@hadoop.apache.org<ma...@hadoop.apache.org>" <us...@hadoop.apache.org>>
Subject: Re: hadoop not using whole disk for HDFS
Yeah. It has the current value of 1073741824 which is like 1.07 gig.
B.
From: Chris Nauroth<ma...@hortonworks.com>
Sent: Tuesday, November 03, 2015 11:57 AM
To: user@hadoop.apache.org<ma...@hadoop.apache.org>
Subject: Re: hadoop not using whole disk for HDFS
Hi Bob,
Does the hdfs-site.xml configuration file contain the property dfs.datanode.du.reserved? If this is defined, then the DataNode intentionally will not use this space for storage of replicas.
<property>
<name>dfs.datanode.du.reserved</name>
<value>0</value>
<description>Reserved space in bytes per volume. Always leave this much space free for non dfs use.
</description>
</property>
--Chris Nauroth
From: MBA <ad...@hotmail.com>>
Reply-To: "user@hadoop.apache.org<ma...@hadoop.apache.org>" <us...@hadoop.apache.org>>
Date: Tuesday, November 3, 2015 at 10:51 AM
To: "user@hadoop.apache.org<ma...@hadoop.apache.org>" <us...@hadoop.apache.org>>
Subject: hadoop not using whole disk for HDFS
I’ve got the Hortonworks distro running on a three node cluster. For some reason the disk available for HDFS is MUCH less than the total disk space. Both of my data nodes have 3TB hard drives. Only 100GB of that is being used for HDFS. Is it possible that I have a setting wrong somewhere?
B.
RE: hadoop not using whole disk for HDFS
Posted by "Naganarasimha G R (Naga)" <ga...@huawei.com>.
Hi Bob,
1. I wasn’t able to set the config to /home/hdfs/data. I got an error that told me I’m not allowed to set that config to the /home directory. So I made it /hdfs/data.
Naga : I am not sure about the HDP Distro but if you make it point to /hdfs/data, still it will be pointing to the root mount itself i.e.
/dev/mapper/centos-root 50G 12G 39G 23% /
Other Alternative is to mount the drive to some other folder other than /home and then try.
2. When I restarted, the space available increased by a whopping 100GB.
Naga : I am particularly not sure how this happened may be you can again recheck if you enter the command "df -h <path of the NM data dir configured>" you will find out how much disk space is available on the related mount for which the path is configured.
Regards,
+ Naga
________________________________
From: Adaryl "Bob" Wakefield, MBA [adaryl.wakefield@hotmail.com]
Sent: Friday, November 06, 2015 06:54
To: user@hadoop.apache.org
Subject: Re: hadoop not using whole disk for HDFS
Is there a maximum amount of disk space that HDFS will use? Is 100GB that max? When we’re supposed to be dealing with “big data” why is the amount of data to be held on any one box such a small number when you’ve got terabytes available?
Adaryl "Bob" Wakefield, MBA
Principal
Mass Street Analytics, LLC
913.938.6685
www.linkedin.com/in/bobwakefieldmba
Twitter: @BobLovesData
From: Adaryl "Bob" Wakefield, MBA<ma...@hotmail.com>
Sent: Wednesday, November 04, 2015 4:38 PM
To: user@hadoop.apache.org<ma...@hadoop.apache.org>
Subject: Re: hadoop not using whole disk for HDFS
This is an experimental cluster and there isn’t anything I can’t lose. I ran into some issues. I’m running the Hortonworks distro and am managing things through Ambari.
1. I wasn’t able to set the config to /home/hdfs/data. I got an error that told me I’m not allowed to set that config to the /home directory. So I made it /hdfs/data.
2. When I restarted, the space available increased by a whopping 100GB.
Adaryl "Bob" Wakefield, MBA
Principal
Mass Street Analytics, LLC
913.938.6685
www.linkedin.com/in/bobwakefieldmba
Twitter: @BobLovesData
From: Naganarasimha G R (Naga)<ma...@huawei.com>
Sent: Wednesday, November 04, 2015 4:26 PM
To: user@hadoop.apache.org<ma...@hadoop.apache.org>
Subject: RE: hadoop not using whole disk for HDFS
Better would be to stop the daemons and copy the data from /hadoop/hdfs/data to /home/hdfs/data , reconfigure dfs.datanode.data.dir to /home/hdfs/data and then start the daemons. If the data is comparitively less !
Ensure you have the backup if have any critical data !
Regards,
+ Naga
________________________________
From: Adaryl "Bob" Wakefield, MBA [adaryl.wakefield@hotmail.com]
Sent: Thursday, November 05, 2015 03:40
To: user@hadoop.apache.org
Subject: Re: hadoop not using whole disk for HDFS
So like I can just create a new folder in the home directory like:
home/hdfs/data
and then set dfs.datanode.data.dir to:
/hadoop/hdfs/data,home/hdfs/data
Restart the node and that should do it correct?
Adaryl "Bob" Wakefield, MBA
Principal
Mass Street Analytics, LLC
913.938.6685
www.linkedin.com/in/bobwakefieldmba
Twitter: @BobLovesData
From: Naganarasimha G R (Naga)<ma...@huawei.com>
Sent: Wednesday, November 04, 2015 3:59 PM
To: user@hadoop.apache.org<ma...@hadoop.apache.org>
Subject: RE: hadoop not using whole disk for HDFS
Hi Bob,
Seems like you have configured to disk dir to be other than an folder in /home, if so try creating another folder and add to "dfs.datanode.data.dir" seperated by comma instead of trying to reset the default.
And its also advised not to use the root partition "/" to be configured for HDFS data dir, if the Dir usage hits the maximum then OS might fail to function properly.
Regards,
+ Naga
________________________________
From: P lva [ruvikal@gmail.com]
Sent: Thursday, November 05, 2015 03:11
To: user@hadoop.apache.org
Subject: Re: hadoop not using whole disk for HDFS
What does your dfs.datanode.data.dir point to ?
On Wed, Nov 4, 2015 at 4:14 PM, Adaryl "Bob" Wakefield, MBA <ad...@hotmail.com>> wrote:
Filesystem Size Used Avail Use% Mounted on
/dev/mapper/centos-root 50G 12G 39G 23% /
devtmpfs 16G 0 16G 0% /dev
tmpfs 16G 0 16G 0% /dev/shm
tmpfs 16G 1.4G 15G 9% /run
tmpfs 16G 0 16G 0% /sys/fs/cgroup
/dev/sda2 494M 123M 372M 25% /boot
/dev/mapper/centos-home 2.7T 33M 2.7T 1% /home
That’s from one datanode. The second one is nearly identical. I discovered that 50GB is actually a default. That seems really weird. Disk space is cheap. Why would you not just use most of the disk and why is it so hard to reset the default?
Adaryl "Bob" Wakefield, MBA
Principal
Mass Street Analytics, LLC
913.938.6685<tel:913.938.6685>
www.linkedin.com/in/bobwakefieldmba<http://www.linkedin.com/in/bobwakefieldmba>
Twitter: @BobLovesData
From: Chris Nauroth<ma...@hortonworks.com>
Sent: Wednesday, November 04, 2015 12:16 PM
To: user@hadoop.apache.org<ma...@hadoop.apache.org>
Subject: Re: hadoop not using whole disk for HDFS
How are those drives partitioned? Is it possible that the directories pointed to by the dfs.datanode.data.dir property in hdfs-site.xml reside on partitions that are sized to only 100 GB? Running commands like df would be a good way to check this at the OS level, independently of Hadoop.
--Chris Nauroth
From: MBA <ad...@hotmail.com>>
Reply-To: "user@hadoop.apache.org<ma...@hadoop.apache.org>" <us...@hadoop.apache.org>>
Date: Tuesday, November 3, 2015 at 11:16 AM
To: "user@hadoop.apache.org<ma...@hadoop.apache.org>" <us...@hadoop.apache.org>>
Subject: Re: hadoop not using whole disk for HDFS
Yeah. It has the current value of 1073741824 which is like 1.07 gig.
B.
From: Chris Nauroth<ma...@hortonworks.com>
Sent: Tuesday, November 03, 2015 11:57 AM
To: user@hadoop.apache.org<ma...@hadoop.apache.org>
Subject: Re: hadoop not using whole disk for HDFS
Hi Bob,
Does the hdfs-site.xml configuration file contain the property dfs.datanode.du.reserved? If this is defined, then the DataNode intentionally will not use this space for storage of replicas.
<property>
<name>dfs.datanode.du.reserved</name>
<value>0</value>
<description>Reserved space in bytes per volume. Always leave this much space free for non dfs use.
</description>
</property>
--Chris Nauroth
From: MBA <ad...@hotmail.com>>
Reply-To: "user@hadoop.apache.org<ma...@hadoop.apache.org>" <us...@hadoop.apache.org>>
Date: Tuesday, November 3, 2015 at 10:51 AM
To: "user@hadoop.apache.org<ma...@hadoop.apache.org>" <us...@hadoop.apache.org>>
Subject: hadoop not using whole disk for HDFS
I’ve got the Hortonworks distro running on a three node cluster. For some reason the disk available for HDFS is MUCH less than the total disk space. Both of my data nodes have 3TB hard drives. Only 100GB of that is being used for HDFS. Is it possible that I have a setting wrong somewhere?
B.
Re: hadoop not using whole disk for HDFS
Posted by "Adaryl \"Bob\" Wakefield, MBA" <ad...@hotmail.com>.
Is there a maximum amount of disk space that HDFS will use? Is 100GB that max? When we’re supposed to be dealing with “big data” why is the amount of data to be held on any one box such a small number when you’ve got terabytes available?
Adaryl "Bob" Wakefield, MBA
Principal
Mass Street Analytics, LLC
913.938.6685
www.linkedin.com/in/bobwakefieldmba
Twitter: @BobLovesData
From: Adaryl "Bob" Wakefield, MBA
Sent: Wednesday, November 04, 2015 4:38 PM
To: user@hadoop.apache.org
Subject: Re: hadoop not using whole disk for HDFS
This is an experimental cluster and there isn’t anything I can’t lose. I ran into some issues. I’m running the Hortonworks distro and am managing things through Ambari.
1. I wasn’t able to set the config to /home/hdfs/data. I got an error that told me I’m not allowed to set that config to the /home directory. So I made it /hdfs/data.
2. When I restarted, the space available increased by a whopping 100GB.
Adaryl "Bob" Wakefield, MBA
Principal
Mass Street Analytics, LLC
913.938.6685
www.linkedin.com/in/bobwakefieldmba
Twitter: @BobLovesData
From: Naganarasimha G R (Naga)
Sent: Wednesday, November 04, 2015 4:26 PM
To: user@hadoop.apache.org
Subject: RE: hadoop not using whole disk for HDFS
Better would be to stop the daemons and copy the data from /hadoop/hdfs/data to /home/hdfs/data , reconfigure dfs.datanode.data.dir to /home/hdfs/data and then start the daemons. If the data is comparitively less !
Ensure you have the backup if have any critical data !
Regards,
+ Naga
--------------------------------------------------------------------------------
From: Adaryl "Bob" Wakefield, MBA [adaryl.wakefield@hotmail.com]
Sent: Thursday, November 05, 2015 03:40
To: user@hadoop.apache.org
Subject: Re: hadoop not using whole disk for HDFS
So like I can just create a new folder in the home directory like:
home/hdfs/data
and then set dfs.datanode.data.dir to:
/hadoop/hdfs/data,home/hdfs/data
Restart the node and that should do it correct?
Adaryl "Bob" Wakefield, MBA
Principal
Mass Street Analytics, LLC
913.938.6685
www.linkedin.com/in/bobwakefieldmba
Twitter: @BobLovesData
From: Naganarasimha G R (Naga)
Sent: Wednesday, November 04, 2015 3:59 PM
To: user@hadoop.apache.org
Subject: RE: hadoop not using whole disk for HDFS
Hi Bob,
Seems like you have configured to disk dir to be other than an folder in /home, if so try creating another folder and add to "dfs.datanode.data.dir" seperated by comma instead of trying to reset the default.
And its also advised not to use the root partition "/" to be configured for HDFS data dir, if the Dir usage hits the maximum then OS might fail to function properly.
Regards,
+ Naga
--------------------------------------------------------------------------------
From: P lva [ruvikal@gmail.com]
Sent: Thursday, November 05, 2015 03:11
To: user@hadoop.apache.org
Subject: Re: hadoop not using whole disk for HDFS
What does your dfs.datanode.data.dir point to ?
On Wed, Nov 4, 2015 at 4:14 PM, Adaryl "Bob" Wakefield, MBA <ad...@hotmail.com> wrote:
Filesystem Size Used Avail Use% Mounted on
/dev/mapper/centos-root 50G 12G 39G 23% /
devtmpfs 16G 0 16G 0% /dev
tmpfs 16G 0 16G 0% /dev/shm
tmpfs 16G 1.4G 15G 9% /run
tmpfs 16G 0 16G 0% /sys/fs/cgroup
/dev/sda2 494M 123M 372M 25% /boot
/dev/mapper/centos-home 2.7T 33M 2.7T 1% /home
That’s from one datanode. The second one is nearly identical. I discovered that 50GB is actually a default. That seems really weird. Disk space is cheap. Why would you not just use most of the disk and why is it so hard to reset the default?
Adaryl "Bob" Wakefield, MBA
Principal
Mass Street Analytics, LLC
913.938.6685
www.linkedin.com/in/bobwakefieldmba
Twitter: @BobLovesData
From: Chris Nauroth
Sent: Wednesday, November 04, 2015 12:16 PM
To: user@hadoop.apache.org
Subject: Re: hadoop not using whole disk for HDFS
How are those drives partitioned? Is it possible that the directories pointed to by the dfs.datanode.data.dir property in hdfs-site.xml reside on partitions that are sized to only 100 GB? Running commands like df would be a good way to check this at the OS level, independently of Hadoop.
--Chris Nauroth
From: MBA <ad...@hotmail.com>
Reply-To: "user@hadoop.apache.org" <us...@hadoop.apache.org>
Date: Tuesday, November 3, 2015 at 11:16 AM
To: "user@hadoop.apache.org" <us...@hadoop.apache.org>
Subject: Re: hadoop not using whole disk for HDFS
Yeah. It has the current value of 1073741824 which is like 1.07 gig.
B.
From: Chris Nauroth
Sent: Tuesday, November 03, 2015 11:57 AM
To: user@hadoop.apache.org
Subject: Re: hadoop not using whole disk for HDFS
Hi Bob,
Does the hdfs-site.xml configuration file contain the property dfs.datanode.du.reserved? If this is defined, then the DataNode intentionally will not use this space for storage of replicas.
<property>
<name>dfs.datanode.du.reserved</name>
<value>0</value>
<description>Reserved space in bytes per volume. Always leave this much space free for non dfs use.
</description>
</property>
--Chris Nauroth
From: MBA <ad...@hotmail.com>
Reply-To: "user@hadoop.apache.org" <us...@hadoop.apache.org>
Date: Tuesday, November 3, 2015 at 10:51 AM
To: "user@hadoop.apache.org" <us...@hadoop.apache.org>
Subject: hadoop not using whole disk for HDFS
I’ve got the Hortonworks distro running on a three node cluster. For some reason the disk available for HDFS is MUCH less than the total disk space. Both of my data nodes have 3TB hard drives. Only 100GB of that is being used for HDFS. Is it possible that I have a setting wrong somewhere?
B.
Re: hadoop not using whole disk for HDFS
Posted by "Adaryl \"Bob\" Wakefield, MBA" <ad...@hotmail.com>.
Is there a maximum amount of disk space that HDFS will use? Is 100GB that max? When we’re supposed to be dealing with “big data” why is the amount of data to be held on any one box such a small number when you’ve got terabytes available?
Adaryl "Bob" Wakefield, MBA
Principal
Mass Street Analytics, LLC
913.938.6685
www.linkedin.com/in/bobwakefieldmba
Twitter: @BobLovesData
From: Adaryl "Bob" Wakefield, MBA
Sent: Wednesday, November 04, 2015 4:38 PM
To: user@hadoop.apache.org
Subject: Re: hadoop not using whole disk for HDFS
This is an experimental cluster and there isn’t anything I can’t lose. I ran into some issues. I’m running the Hortonworks distro and am managing things through Ambari.
1. I wasn’t able to set the config to /home/hdfs/data. I got an error that told me I’m not allowed to set that config to the /home directory. So I made it /hdfs/data.
2. When I restarted, the space available increased by a whopping 100GB.
Adaryl "Bob" Wakefield, MBA
Principal
Mass Street Analytics, LLC
913.938.6685
www.linkedin.com/in/bobwakefieldmba
Twitter: @BobLovesData
From: Naganarasimha G R (Naga)
Sent: Wednesday, November 04, 2015 4:26 PM
To: user@hadoop.apache.org
Subject: RE: hadoop not using whole disk for HDFS
Better would be to stop the daemons and copy the data from /hadoop/hdfs/data to /home/hdfs/data , reconfigure dfs.datanode.data.dir to /home/hdfs/data and then start the daemons. If the data is comparitively less !
Ensure you have the backup if have any critical data !
Regards,
+ Naga
--------------------------------------------------------------------------------
From: Adaryl "Bob" Wakefield, MBA [adaryl.wakefield@hotmail.com]
Sent: Thursday, November 05, 2015 03:40
To: user@hadoop.apache.org
Subject: Re: hadoop not using whole disk for HDFS
So like I can just create a new folder in the home directory like:
home/hdfs/data
and then set dfs.datanode.data.dir to:
/hadoop/hdfs/data,home/hdfs/data
Restart the node and that should do it correct?
Adaryl "Bob" Wakefield, MBA
Principal
Mass Street Analytics, LLC
913.938.6685
www.linkedin.com/in/bobwakefieldmba
Twitter: @BobLovesData
From: Naganarasimha G R (Naga)
Sent: Wednesday, November 04, 2015 3:59 PM
To: user@hadoop.apache.org
Subject: RE: hadoop not using whole disk for HDFS
Hi Bob,
Seems like you have configured to disk dir to be other than an folder in /home, if so try creating another folder and add to "dfs.datanode.data.dir" seperated by comma instead of trying to reset the default.
And its also advised not to use the root partition "/" to be configured for HDFS data dir, if the Dir usage hits the maximum then OS might fail to function properly.
Regards,
+ Naga
--------------------------------------------------------------------------------
From: P lva [ruvikal@gmail.com]
Sent: Thursday, November 05, 2015 03:11
To: user@hadoop.apache.org
Subject: Re: hadoop not using whole disk for HDFS
What does your dfs.datanode.data.dir point to ?
On Wed, Nov 4, 2015 at 4:14 PM, Adaryl "Bob" Wakefield, MBA <ad...@hotmail.com> wrote:
Filesystem Size Used Avail Use% Mounted on
/dev/mapper/centos-root 50G 12G 39G 23% /
devtmpfs 16G 0 16G 0% /dev
tmpfs 16G 0 16G 0% /dev/shm
tmpfs 16G 1.4G 15G 9% /run
tmpfs 16G 0 16G 0% /sys/fs/cgroup
/dev/sda2 494M 123M 372M 25% /boot
/dev/mapper/centos-home 2.7T 33M 2.7T 1% /home
That’s from one datanode. The second one is nearly identical. I discovered that 50GB is actually a default. That seems really weird. Disk space is cheap. Why would you not just use most of the disk and why is it so hard to reset the default?
Adaryl "Bob" Wakefield, MBA
Principal
Mass Street Analytics, LLC
913.938.6685
www.linkedin.com/in/bobwakefieldmba
Twitter: @BobLovesData
From: Chris Nauroth
Sent: Wednesday, November 04, 2015 12:16 PM
To: user@hadoop.apache.org
Subject: Re: hadoop not using whole disk for HDFS
How are those drives partitioned? Is it possible that the directories pointed to by the dfs.datanode.data.dir property in hdfs-site.xml reside on partitions that are sized to only 100 GB? Running commands like df would be a good way to check this at the OS level, independently of Hadoop.
--Chris Nauroth
From: MBA <ad...@hotmail.com>
Reply-To: "user@hadoop.apache.org" <us...@hadoop.apache.org>
Date: Tuesday, November 3, 2015 at 11:16 AM
To: "user@hadoop.apache.org" <us...@hadoop.apache.org>
Subject: Re: hadoop not using whole disk for HDFS
Yeah. It has the current value of 1073741824 which is like 1.07 gig.
B.
From: Chris Nauroth
Sent: Tuesday, November 03, 2015 11:57 AM
To: user@hadoop.apache.org
Subject: Re: hadoop not using whole disk for HDFS
Hi Bob,
Does the hdfs-site.xml configuration file contain the property dfs.datanode.du.reserved? If this is defined, then the DataNode intentionally will not use this space for storage of replicas.
<property>
<name>dfs.datanode.du.reserved</name>
<value>0</value>
<description>Reserved space in bytes per volume. Always leave this much space free for non dfs use.
</description>
</property>
--Chris Nauroth
From: MBA <ad...@hotmail.com>
Reply-To: "user@hadoop.apache.org" <us...@hadoop.apache.org>
Date: Tuesday, November 3, 2015 at 10:51 AM
To: "user@hadoop.apache.org" <us...@hadoop.apache.org>
Subject: hadoop not using whole disk for HDFS
I’ve got the Hortonworks distro running on a three node cluster. For some reason the disk available for HDFS is MUCH less than the total disk space. Both of my data nodes have 3TB hard drives. Only 100GB of that is being used for HDFS. Is it possible that I have a setting wrong somewhere?
B.
Re: hadoop not using whole disk for HDFS
Posted by "Adaryl \"Bob\" Wakefield, MBA" <ad...@hotmail.com>.
Is there a maximum amount of disk space that HDFS will use? Is 100GB that max? When we’re supposed to be dealing with “big data” why is the amount of data to be held on any one box such a small number when you’ve got terabytes available?
Adaryl "Bob" Wakefield, MBA
Principal
Mass Street Analytics, LLC
913.938.6685
www.linkedin.com/in/bobwakefieldmba
Twitter: @BobLovesData
From: Adaryl "Bob" Wakefield, MBA
Sent: Wednesday, November 04, 2015 4:38 PM
To: user@hadoop.apache.org
Subject: Re: hadoop not using whole disk for HDFS
This is an experimental cluster and there isn’t anything I can’t lose. I ran into some issues. I’m running the Hortonworks distro and am managing things through Ambari.
1. I wasn’t able to set the config to /home/hdfs/data. I got an error that told me I’m not allowed to set that config to the /home directory. So I made it /hdfs/data.
2. When I restarted, the space available increased by a whopping 100GB.
Adaryl "Bob" Wakefield, MBA
Principal
Mass Street Analytics, LLC
913.938.6685
www.linkedin.com/in/bobwakefieldmba
Twitter: @BobLovesData
From: Naganarasimha G R (Naga)
Sent: Wednesday, November 04, 2015 4:26 PM
To: user@hadoop.apache.org
Subject: RE: hadoop not using whole disk for HDFS
Better would be to stop the daemons and copy the data from /hadoop/hdfs/data to /home/hdfs/data , reconfigure dfs.datanode.data.dir to /home/hdfs/data and then start the daemons. If the data is comparitively less !
Ensure you have the backup if have any critical data !
Regards,
+ Naga
--------------------------------------------------------------------------------
From: Adaryl "Bob" Wakefield, MBA [adaryl.wakefield@hotmail.com]
Sent: Thursday, November 05, 2015 03:40
To: user@hadoop.apache.org
Subject: Re: hadoop not using whole disk for HDFS
So like I can just create a new folder in the home directory like:
home/hdfs/data
and then set dfs.datanode.data.dir to:
/hadoop/hdfs/data,home/hdfs/data
Restart the node and that should do it correct?
Adaryl "Bob" Wakefield, MBA
Principal
Mass Street Analytics, LLC
913.938.6685
www.linkedin.com/in/bobwakefieldmba
Twitter: @BobLovesData
From: Naganarasimha G R (Naga)
Sent: Wednesday, November 04, 2015 3:59 PM
To: user@hadoop.apache.org
Subject: RE: hadoop not using whole disk for HDFS
Hi Bob,
Seems like you have configured to disk dir to be other than an folder in /home, if so try creating another folder and add to "dfs.datanode.data.dir" seperated by comma instead of trying to reset the default.
And its also advised not to use the root partition "/" to be configured for HDFS data dir, if the Dir usage hits the maximum then OS might fail to function properly.
Regards,
+ Naga
--------------------------------------------------------------------------------
From: P lva [ruvikal@gmail.com]
Sent: Thursday, November 05, 2015 03:11
To: user@hadoop.apache.org
Subject: Re: hadoop not using whole disk for HDFS
What does your dfs.datanode.data.dir point to ?
On Wed, Nov 4, 2015 at 4:14 PM, Adaryl "Bob" Wakefield, MBA <ad...@hotmail.com> wrote:
Filesystem Size Used Avail Use% Mounted on
/dev/mapper/centos-root 50G 12G 39G 23% /
devtmpfs 16G 0 16G 0% /dev
tmpfs 16G 0 16G 0% /dev/shm
tmpfs 16G 1.4G 15G 9% /run
tmpfs 16G 0 16G 0% /sys/fs/cgroup
/dev/sda2 494M 123M 372M 25% /boot
/dev/mapper/centos-home 2.7T 33M 2.7T 1% /home
That’s from one datanode. The second one is nearly identical. I discovered that 50GB is actually a default. That seems really weird. Disk space is cheap. Why would you not just use most of the disk and why is it so hard to reset the default?
Adaryl "Bob" Wakefield, MBA
Principal
Mass Street Analytics, LLC
913.938.6685
www.linkedin.com/in/bobwakefieldmba
Twitter: @BobLovesData
From: Chris Nauroth
Sent: Wednesday, November 04, 2015 12:16 PM
To: user@hadoop.apache.org
Subject: Re: hadoop not using whole disk for HDFS
How are those drives partitioned? Is it possible that the directories pointed to by the dfs.datanode.data.dir property in hdfs-site.xml reside on partitions that are sized to only 100 GB? Running commands like df would be a good way to check this at the OS level, independently of Hadoop.
--Chris Nauroth
From: MBA <ad...@hotmail.com>
Reply-To: "user@hadoop.apache.org" <us...@hadoop.apache.org>
Date: Tuesday, November 3, 2015 at 11:16 AM
To: "user@hadoop.apache.org" <us...@hadoop.apache.org>
Subject: Re: hadoop not using whole disk for HDFS
Yeah. It has the current value of 1073741824 which is like 1.07 gig.
B.
From: Chris Nauroth
Sent: Tuesday, November 03, 2015 11:57 AM
To: user@hadoop.apache.org
Subject: Re: hadoop not using whole disk for HDFS
Hi Bob,
Does the hdfs-site.xml configuration file contain the property dfs.datanode.du.reserved? If this is defined, then the DataNode intentionally will not use this space for storage of replicas.
<property>
<name>dfs.datanode.du.reserved</name>
<value>0</value>
<description>Reserved space in bytes per volume. Always leave this much space free for non dfs use.
</description>
</property>
--Chris Nauroth
From: MBA <ad...@hotmail.com>
Reply-To: "user@hadoop.apache.org" <us...@hadoop.apache.org>
Date: Tuesday, November 3, 2015 at 10:51 AM
To: "user@hadoop.apache.org" <us...@hadoop.apache.org>
Subject: hadoop not using whole disk for HDFS
I’ve got the Hortonworks distro running on a three node cluster. For some reason the disk available for HDFS is MUCH less than the total disk space. Both of my data nodes have 3TB hard drives. Only 100GB of that is being used for HDFS. Is it possible that I have a setting wrong somewhere?
B.
Re: hadoop not using whole disk for HDFS
Posted by "Adaryl \"Bob\" Wakefield, MBA" <ad...@hotmail.com>.
Is there a maximum amount of disk space that HDFS will use? Is 100GB that max? When we’re supposed to be dealing with “big data” why is the amount of data to be held on any one box such a small number when you’ve got terabytes available?
Adaryl "Bob" Wakefield, MBA
Principal
Mass Street Analytics, LLC
913.938.6685
www.linkedin.com/in/bobwakefieldmba
Twitter: @BobLovesData
From: Adaryl "Bob" Wakefield, MBA
Sent: Wednesday, November 04, 2015 4:38 PM
To: user@hadoop.apache.org
Subject: Re: hadoop not using whole disk for HDFS
This is an experimental cluster and there isn’t anything I can’t lose. I ran into some issues. I’m running the Hortonworks distro and am managing things through Ambari.
1. I wasn’t able to set the config to /home/hdfs/data. I got an error that told me I’m not allowed to set that config to the /home directory. So I made it /hdfs/data.
2. When I restarted, the space available increased by a whopping 100GB.
Adaryl "Bob" Wakefield, MBA
Principal
Mass Street Analytics, LLC
913.938.6685
www.linkedin.com/in/bobwakefieldmba
Twitter: @BobLovesData
From: Naganarasimha G R (Naga)
Sent: Wednesday, November 04, 2015 4:26 PM
To: user@hadoop.apache.org
Subject: RE: hadoop not using whole disk for HDFS
Better would be to stop the daemons and copy the data from /hadoop/hdfs/data to /home/hdfs/data , reconfigure dfs.datanode.data.dir to /home/hdfs/data and then start the daemons. If the data is comparitively less !
Ensure you have the backup if have any critical data !
Regards,
+ Naga
--------------------------------------------------------------------------------
From: Adaryl "Bob" Wakefield, MBA [adaryl.wakefield@hotmail.com]
Sent: Thursday, November 05, 2015 03:40
To: user@hadoop.apache.org
Subject: Re: hadoop not using whole disk for HDFS
So like I can just create a new folder in the home directory like:
home/hdfs/data
and then set dfs.datanode.data.dir to:
/hadoop/hdfs/data,home/hdfs/data
Restart the node and that should do it correct?
Adaryl "Bob" Wakefield, MBA
Principal
Mass Street Analytics, LLC
913.938.6685
www.linkedin.com/in/bobwakefieldmba
Twitter: @BobLovesData
From: Naganarasimha G R (Naga)
Sent: Wednesday, November 04, 2015 3:59 PM
To: user@hadoop.apache.org
Subject: RE: hadoop not using whole disk for HDFS
Hi Bob,
Seems like you have configured to disk dir to be other than an folder in /home, if so try creating another folder and add to "dfs.datanode.data.dir" seperated by comma instead of trying to reset the default.
And its also advised not to use the root partition "/" to be configured for HDFS data dir, if the Dir usage hits the maximum then OS might fail to function properly.
Regards,
+ Naga
--------------------------------------------------------------------------------
From: P lva [ruvikal@gmail.com]
Sent: Thursday, November 05, 2015 03:11
To: user@hadoop.apache.org
Subject: Re: hadoop not using whole disk for HDFS
What does your dfs.datanode.data.dir point to ?
On Wed, Nov 4, 2015 at 4:14 PM, Adaryl "Bob" Wakefield, MBA <ad...@hotmail.com> wrote:
Filesystem Size Used Avail Use% Mounted on
/dev/mapper/centos-root 50G 12G 39G 23% /
devtmpfs 16G 0 16G 0% /dev
tmpfs 16G 0 16G 0% /dev/shm
tmpfs 16G 1.4G 15G 9% /run
tmpfs 16G 0 16G 0% /sys/fs/cgroup
/dev/sda2 494M 123M 372M 25% /boot
/dev/mapper/centos-home 2.7T 33M 2.7T 1% /home
That’s from one datanode. The second one is nearly identical. I discovered that 50GB is actually a default. That seems really weird. Disk space is cheap. Why would you not just use most of the disk and why is it so hard to reset the default?
Adaryl "Bob" Wakefield, MBA
Principal
Mass Street Analytics, LLC
913.938.6685
www.linkedin.com/in/bobwakefieldmba
Twitter: @BobLovesData
From: Chris Nauroth
Sent: Wednesday, November 04, 2015 12:16 PM
To: user@hadoop.apache.org
Subject: Re: hadoop not using whole disk for HDFS
How are those drives partitioned? Is it possible that the directories pointed to by the dfs.datanode.data.dir property in hdfs-site.xml reside on partitions that are sized to only 100 GB? Running commands like df would be a good way to check this at the OS level, independently of Hadoop.
--Chris Nauroth
From: MBA <ad...@hotmail.com>
Reply-To: "user@hadoop.apache.org" <us...@hadoop.apache.org>
Date: Tuesday, November 3, 2015 at 11:16 AM
To: "user@hadoop.apache.org" <us...@hadoop.apache.org>
Subject: Re: hadoop not using whole disk for HDFS
Yeah. It has the current value of 1073741824 which is like 1.07 gig.
B.
From: Chris Nauroth
Sent: Tuesday, November 03, 2015 11:57 AM
To: user@hadoop.apache.org
Subject: Re: hadoop not using whole disk for HDFS
Hi Bob,
Does the hdfs-site.xml configuration file contain the property dfs.datanode.du.reserved? If this is defined, then the DataNode intentionally will not use this space for storage of replicas.
<property>
<name>dfs.datanode.du.reserved</name>
<value>0</value>
<description>Reserved space in bytes per volume. Always leave this much space free for non dfs use.
</description>
</property>
--Chris Nauroth
From: MBA <ad...@hotmail.com>
Reply-To: "user@hadoop.apache.org" <us...@hadoop.apache.org>
Date: Tuesday, November 3, 2015 at 10:51 AM
To: "user@hadoop.apache.org" <us...@hadoop.apache.org>
Subject: hadoop not using whole disk for HDFS
I’ve got the Hortonworks distro running on a three node cluster. For some reason the disk available for HDFS is MUCH less than the total disk space. Both of my data nodes have 3TB hard drives. Only 100GB of that is being used for HDFS. Is it possible that I have a setting wrong somewhere?
B.
Re: hadoop not using whole disk for HDFS
Posted by "Adaryl \"Bob\" Wakefield, MBA" <ad...@hotmail.com>.
This is an experimental cluster and there isn’t anything I can’t lose. I ran into some issues. I’m running the Hortonworks distro and am managing things through Ambari.
1. I wasn’t able to set the config to /home/hdfs/data. I got an error that told me I’m not allowed to set that config to the /home directory. So I made it /hdfs/data.
2. When I restarted, the space available increased by a whopping 100GB.
Adaryl "Bob" Wakefield, MBA
Principal
Mass Street Analytics, LLC
913.938.6685
www.linkedin.com/in/bobwakefieldmba
Twitter: @BobLovesData
From: Naganarasimha G R (Naga)
Sent: Wednesday, November 04, 2015 4:26 PM
To: user@hadoop.apache.org
Subject: RE: hadoop not using whole disk for HDFS
Better would be to stop the daemons and copy the data from /hadoop/hdfs/data to /home/hdfs/data , reconfigure dfs.datanode.data.dir to /home/hdfs/data and then start the daemons. If the data is comparitively less !
Ensure you have the backup if have any critical data !
Regards,
+ Naga
--------------------------------------------------------------------------------
From: Adaryl "Bob" Wakefield, MBA [adaryl.wakefield@hotmail.com]
Sent: Thursday, November 05, 2015 03:40
To: user@hadoop.apache.org
Subject: Re: hadoop not using whole disk for HDFS
So like I can just create a new folder in the home directory like:
home/hdfs/data
and then set dfs.datanode.data.dir to:
/hadoop/hdfs/data,home/hdfs/data
Restart the node and that should do it correct?
Adaryl "Bob" Wakefield, MBA
Principal
Mass Street Analytics, LLC
913.938.6685
www.linkedin.com/in/bobwakefieldmba
Twitter: @BobLovesData
From: Naganarasimha G R (Naga)
Sent: Wednesday, November 04, 2015 3:59 PM
To: user@hadoop.apache.org
Subject: RE: hadoop not using whole disk for HDFS
Hi Bob,
Seems like you have configured to disk dir to be other than an folder in /home, if so try creating another folder and add to "dfs.datanode.data.dir" seperated by comma instead of trying to reset the default.
And its also advised not to use the root partition "/" to be configured for HDFS data dir, if the Dir usage hits the maximum then OS might fail to function properly.
Regards,
+ Naga
--------------------------------------------------------------------------------
From: P lva [ruvikal@gmail.com]
Sent: Thursday, November 05, 2015 03:11
To: user@hadoop.apache.org
Subject: Re: hadoop not using whole disk for HDFS
What does your dfs.datanode.data.dir point to ?
On Wed, Nov 4, 2015 at 4:14 PM, Adaryl "Bob" Wakefield, MBA <ad...@hotmail.com> wrote:
Filesystem Size Used Avail Use% Mounted on
/dev/mapper/centos-root 50G 12G 39G 23% /
devtmpfs 16G 0 16G 0% /dev
tmpfs 16G 0 16G 0% /dev/shm
tmpfs 16G 1.4G 15G 9% /run
tmpfs 16G 0 16G 0% /sys/fs/cgroup
/dev/sda2 494M 123M 372M 25% /boot
/dev/mapper/centos-home 2.7T 33M 2.7T 1% /home
That’s from one datanode. The second one is nearly identical. I discovered that 50GB is actually a default. That seems really weird. Disk space is cheap. Why would you not just use most of the disk and why is it so hard to reset the default?
Adaryl "Bob" Wakefield, MBA
Principal
Mass Street Analytics, LLC
913.938.6685
www.linkedin.com/in/bobwakefieldmba
Twitter: @BobLovesData
From: Chris Nauroth
Sent: Wednesday, November 04, 2015 12:16 PM
To: user@hadoop.apache.org
Subject: Re: hadoop not using whole disk for HDFS
How are those drives partitioned? Is it possible that the directories pointed to by the dfs.datanode.data.dir property in hdfs-site.xml reside on partitions that are sized to only 100 GB? Running commands like df would be a good way to check this at the OS level, independently of Hadoop.
--Chris Nauroth
From: MBA <ad...@hotmail.com>
Reply-To: "user@hadoop.apache.org" <us...@hadoop.apache.org>
Date: Tuesday, November 3, 2015 at 11:16 AM
To: "user@hadoop.apache.org" <us...@hadoop.apache.org>
Subject: Re: hadoop not using whole disk for HDFS
Yeah. It has the current value of 1073741824 which is like 1.07 gig.
B.
From: Chris Nauroth
Sent: Tuesday, November 03, 2015 11:57 AM
To: user@hadoop.apache.org
Subject: Re: hadoop not using whole disk for HDFS
Hi Bob,
Does the hdfs-site.xml configuration file contain the property dfs.datanode.du.reserved? If this is defined, then the DataNode intentionally will not use this space for storage of replicas.
<property>
<name>dfs.datanode.du.reserved</name>
<value>0</value>
<description>Reserved space in bytes per volume. Always leave this much space free for non dfs use.
</description>
</property>
--Chris Nauroth
From: MBA <ad...@hotmail.com>
Reply-To: "user@hadoop.apache.org" <us...@hadoop.apache.org>
Date: Tuesday, November 3, 2015 at 10:51 AM
To: "user@hadoop.apache.org" <us...@hadoop.apache.org>
Subject: hadoop not using whole disk for HDFS
I’ve got the Hortonworks distro running on a three node cluster. For some reason the disk available for HDFS is MUCH less than the total disk space. Both of my data nodes have 3TB hard drives. Only 100GB of that is being used for HDFS. Is it possible that I have a setting wrong somewhere?
B.
Re: hadoop not using whole disk for HDFS
Posted by "Adaryl \"Bob\" Wakefield, MBA" <ad...@hotmail.com>.
This is an experimental cluster and there isn’t anything I can’t lose. I ran into some issues. I’m running the Hortonworks distro and am managing things through Ambari.
1. I wasn’t able to set the config to /home/hdfs/data. I got an error that told me I’m not allowed to set that config to the /home directory. So I made it /hdfs/data.
2. When I restarted, the space available increased by a whopping 100GB.
Adaryl "Bob" Wakefield, MBA
Principal
Mass Street Analytics, LLC
913.938.6685
www.linkedin.com/in/bobwakefieldmba
Twitter: @BobLovesData
From: Naganarasimha G R (Naga)
Sent: Wednesday, November 04, 2015 4:26 PM
To: user@hadoop.apache.org
Subject: RE: hadoop not using whole disk for HDFS
Better would be to stop the daemons and copy the data from /hadoop/hdfs/data to /home/hdfs/data , reconfigure dfs.datanode.data.dir to /home/hdfs/data and then start the daemons. If the data is comparitively less !
Ensure you have the backup if have any critical data !
Regards,
+ Naga
--------------------------------------------------------------------------------
From: Adaryl "Bob" Wakefield, MBA [adaryl.wakefield@hotmail.com]
Sent: Thursday, November 05, 2015 03:40
To: user@hadoop.apache.org
Subject: Re: hadoop not using whole disk for HDFS
So like I can just create a new folder in the home directory like:
home/hdfs/data
and then set dfs.datanode.data.dir to:
/hadoop/hdfs/data,home/hdfs/data
Restart the node and that should do it correct?
Adaryl "Bob" Wakefield, MBA
Principal
Mass Street Analytics, LLC
913.938.6685
www.linkedin.com/in/bobwakefieldmba
Twitter: @BobLovesData
From: Naganarasimha G R (Naga)
Sent: Wednesday, November 04, 2015 3:59 PM
To: user@hadoop.apache.org
Subject: RE: hadoop not using whole disk for HDFS
Hi Bob,
Seems like you have configured to disk dir to be other than an folder in /home, if so try creating another folder and add to "dfs.datanode.data.dir" seperated by comma instead of trying to reset the default.
And its also advised not to use the root partition "/" to be configured for HDFS data dir, if the Dir usage hits the maximum then OS might fail to function properly.
Regards,
+ Naga
--------------------------------------------------------------------------------
From: P lva [ruvikal@gmail.com]
Sent: Thursday, November 05, 2015 03:11
To: user@hadoop.apache.org
Subject: Re: hadoop not using whole disk for HDFS
What does your dfs.datanode.data.dir point to ?
On Wed, Nov 4, 2015 at 4:14 PM, Adaryl "Bob" Wakefield, MBA <ad...@hotmail.com> wrote:
Filesystem Size Used Avail Use% Mounted on
/dev/mapper/centos-root 50G 12G 39G 23% /
devtmpfs 16G 0 16G 0% /dev
tmpfs 16G 0 16G 0% /dev/shm
tmpfs 16G 1.4G 15G 9% /run
tmpfs 16G 0 16G 0% /sys/fs/cgroup
/dev/sda2 494M 123M 372M 25% /boot
/dev/mapper/centos-home 2.7T 33M 2.7T 1% /home
That’s from one datanode. The second one is nearly identical. I discovered that 50GB is actually a default. That seems really weird. Disk space is cheap. Why would you not just use most of the disk and why is it so hard to reset the default?
Adaryl "Bob" Wakefield, MBA
Principal
Mass Street Analytics, LLC
913.938.6685
www.linkedin.com/in/bobwakefieldmba
Twitter: @BobLovesData
From: Chris Nauroth
Sent: Wednesday, November 04, 2015 12:16 PM
To: user@hadoop.apache.org
Subject: Re: hadoop not using whole disk for HDFS
How are those drives partitioned? Is it possible that the directories pointed to by the dfs.datanode.data.dir property in hdfs-site.xml reside on partitions that are sized to only 100 GB? Running commands like df would be a good way to check this at the OS level, independently of Hadoop.
--Chris Nauroth
From: MBA <ad...@hotmail.com>
Reply-To: "user@hadoop.apache.org" <us...@hadoop.apache.org>
Date: Tuesday, November 3, 2015 at 11:16 AM
To: "user@hadoop.apache.org" <us...@hadoop.apache.org>
Subject: Re: hadoop not using whole disk for HDFS
Yeah. It has the current value of 1073741824 which is like 1.07 gig.
B.
From: Chris Nauroth
Sent: Tuesday, November 03, 2015 11:57 AM
To: user@hadoop.apache.org
Subject: Re: hadoop not using whole disk for HDFS
Hi Bob,
Does the hdfs-site.xml configuration file contain the property dfs.datanode.du.reserved? If this is defined, then the DataNode intentionally will not use this space for storage of replicas.
<property>
<name>dfs.datanode.du.reserved</name>
<value>0</value>
<description>Reserved space in bytes per volume. Always leave this much space free for non dfs use.
</description>
</property>
--Chris Nauroth
From: MBA <ad...@hotmail.com>
Reply-To: "user@hadoop.apache.org" <us...@hadoop.apache.org>
Date: Tuesday, November 3, 2015 at 10:51 AM
To: "user@hadoop.apache.org" <us...@hadoop.apache.org>
Subject: hadoop not using whole disk for HDFS
I’ve got the Hortonworks distro running on a three node cluster. For some reason the disk available for HDFS is MUCH less than the total disk space. Both of my data nodes have 3TB hard drives. Only 100GB of that is being used for HDFS. Is it possible that I have a setting wrong somewhere?
B.
Re: hadoop not using whole disk for HDFS
Posted by "Adaryl \"Bob\" Wakefield, MBA" <ad...@hotmail.com>.
This is an experimental cluster and there isn’t anything I can’t lose. I ran into some issues. I’m running the Hortonworks distro and am managing things through Ambari.
1. I wasn’t able to set the config to /home/hdfs/data. I got an error that told me I’m not allowed to set that config to the /home directory. So I made it /hdfs/data.
2. When I restarted, the space available increased by a whopping 100GB.
Adaryl "Bob" Wakefield, MBA
Principal
Mass Street Analytics, LLC
913.938.6685
www.linkedin.com/in/bobwakefieldmba
Twitter: @BobLovesData
From: Naganarasimha G R (Naga)
Sent: Wednesday, November 04, 2015 4:26 PM
To: user@hadoop.apache.org
Subject: RE: hadoop not using whole disk for HDFS
Better would be to stop the daemons and copy the data from /hadoop/hdfs/data to /home/hdfs/data , reconfigure dfs.datanode.data.dir to /home/hdfs/data and then start the daemons. If the data is comparitively less !
Ensure you have the backup if have any critical data !
Regards,
+ Naga
--------------------------------------------------------------------------------
From: Adaryl "Bob" Wakefield, MBA [adaryl.wakefield@hotmail.com]
Sent: Thursday, November 05, 2015 03:40
To: user@hadoop.apache.org
Subject: Re: hadoop not using whole disk for HDFS
So like I can just create a new folder in the home directory like:
home/hdfs/data
and then set dfs.datanode.data.dir to:
/hadoop/hdfs/data,home/hdfs/data
Restart the node and that should do it correct?
Adaryl "Bob" Wakefield, MBA
Principal
Mass Street Analytics, LLC
913.938.6685
www.linkedin.com/in/bobwakefieldmba
Twitter: @BobLovesData
From: Naganarasimha G R (Naga)
Sent: Wednesday, November 04, 2015 3:59 PM
To: user@hadoop.apache.org
Subject: RE: hadoop not using whole disk for HDFS
Hi Bob,
Seems like you have configured to disk dir to be other than an folder in /home, if so try creating another folder and add to "dfs.datanode.data.dir" seperated by comma instead of trying to reset the default.
And its also advised not to use the root partition "/" to be configured for HDFS data dir, if the Dir usage hits the maximum then OS might fail to function properly.
Regards,
+ Naga
--------------------------------------------------------------------------------
From: P lva [ruvikal@gmail.com]
Sent: Thursday, November 05, 2015 03:11
To: user@hadoop.apache.org
Subject: Re: hadoop not using whole disk for HDFS
What does your dfs.datanode.data.dir point to ?
On Wed, Nov 4, 2015 at 4:14 PM, Adaryl "Bob" Wakefield, MBA <ad...@hotmail.com> wrote:
Filesystem Size Used Avail Use% Mounted on
/dev/mapper/centos-root 50G 12G 39G 23% /
devtmpfs 16G 0 16G 0% /dev
tmpfs 16G 0 16G 0% /dev/shm
tmpfs 16G 1.4G 15G 9% /run
tmpfs 16G 0 16G 0% /sys/fs/cgroup
/dev/sda2 494M 123M 372M 25% /boot
/dev/mapper/centos-home 2.7T 33M 2.7T 1% /home
That’s from one datanode. The second one is nearly identical. I discovered that 50GB is actually a default. That seems really weird. Disk space is cheap. Why would you not just use most of the disk and why is it so hard to reset the default?
Adaryl "Bob" Wakefield, MBA
Principal
Mass Street Analytics, LLC
913.938.6685
www.linkedin.com/in/bobwakefieldmba
Twitter: @BobLovesData
From: Chris Nauroth
Sent: Wednesday, November 04, 2015 12:16 PM
To: user@hadoop.apache.org
Subject: Re: hadoop not using whole disk for HDFS
How are those drives partitioned? Is it possible that the directories pointed to by the dfs.datanode.data.dir property in hdfs-site.xml reside on partitions that are sized to only 100 GB? Running commands like df would be a good way to check this at the OS level, independently of Hadoop.
--Chris Nauroth
From: MBA <ad...@hotmail.com>
Reply-To: "user@hadoop.apache.org" <us...@hadoop.apache.org>
Date: Tuesday, November 3, 2015 at 11:16 AM
To: "user@hadoop.apache.org" <us...@hadoop.apache.org>
Subject: Re: hadoop not using whole disk for HDFS
Yeah. It has the current value of 1073741824 which is like 1.07 gig.
B.
From: Chris Nauroth
Sent: Tuesday, November 03, 2015 11:57 AM
To: user@hadoop.apache.org
Subject: Re: hadoop not using whole disk for HDFS
Hi Bob,
Does the hdfs-site.xml configuration file contain the property dfs.datanode.du.reserved? If this is defined, then the DataNode intentionally will not use this space for storage of replicas.
<property>
<name>dfs.datanode.du.reserved</name>
<value>0</value>
<description>Reserved space in bytes per volume. Always leave this much space free for non dfs use.
</description>
</property>
--Chris Nauroth
From: MBA <ad...@hotmail.com>
Reply-To: "user@hadoop.apache.org" <us...@hadoop.apache.org>
Date: Tuesday, November 3, 2015 at 10:51 AM
To: "user@hadoop.apache.org" <us...@hadoop.apache.org>
Subject: hadoop not using whole disk for HDFS
I’ve got the Hortonworks distro running on a three node cluster. For some reason the disk available for HDFS is MUCH less than the total disk space. Both of my data nodes have 3TB hard drives. Only 100GB of that is being used for HDFS. Is it possible that I have a setting wrong somewhere?
B.
Re: hadoop not using whole disk for HDFS
Posted by "Adaryl \"Bob\" Wakefield, MBA" <ad...@hotmail.com>.
This is an experimental cluster and there isn’t anything I can’t lose. I ran into some issues. I’m running the Hortonworks distro and am managing things through Ambari.
1. I wasn’t able to set the config to /home/hdfs/data. I got an error that told me I’m not allowed to set that config to the /home directory. So I made it /hdfs/data.
2. When I restarted, the space available increased by a whopping 100GB.
Adaryl "Bob" Wakefield, MBA
Principal
Mass Street Analytics, LLC
913.938.6685
www.linkedin.com/in/bobwakefieldmba
Twitter: @BobLovesData
From: Naganarasimha G R (Naga)
Sent: Wednesday, November 04, 2015 4:26 PM
To: user@hadoop.apache.org
Subject: RE: hadoop not using whole disk for HDFS
Better would be to stop the daemons and copy the data from /hadoop/hdfs/data to /home/hdfs/data , reconfigure dfs.datanode.data.dir to /home/hdfs/data and then start the daemons. If the data is comparitively less !
Ensure you have the backup if have any critical data !
Regards,
+ Naga
--------------------------------------------------------------------------------
From: Adaryl "Bob" Wakefield, MBA [adaryl.wakefield@hotmail.com]
Sent: Thursday, November 05, 2015 03:40
To: user@hadoop.apache.org
Subject: Re: hadoop not using whole disk for HDFS
So like I can just create a new folder in the home directory like:
home/hdfs/data
and then set dfs.datanode.data.dir to:
/hadoop/hdfs/data,home/hdfs/data
Restart the node and that should do it correct?
Adaryl "Bob" Wakefield, MBA
Principal
Mass Street Analytics, LLC
913.938.6685
www.linkedin.com/in/bobwakefieldmba
Twitter: @BobLovesData
From: Naganarasimha G R (Naga)
Sent: Wednesday, November 04, 2015 3:59 PM
To: user@hadoop.apache.org
Subject: RE: hadoop not using whole disk for HDFS
Hi Bob,
Seems like you have configured to disk dir to be other than an folder in /home, if so try creating another folder and add to "dfs.datanode.data.dir" seperated by comma instead of trying to reset the default.
And its also advised not to use the root partition "/" to be configured for HDFS data dir, if the Dir usage hits the maximum then OS might fail to function properly.
Regards,
+ Naga
--------------------------------------------------------------------------------
From: P lva [ruvikal@gmail.com]
Sent: Thursday, November 05, 2015 03:11
To: user@hadoop.apache.org
Subject: Re: hadoop not using whole disk for HDFS
What does your dfs.datanode.data.dir point to ?
On Wed, Nov 4, 2015 at 4:14 PM, Adaryl "Bob" Wakefield, MBA <ad...@hotmail.com> wrote:
Filesystem Size Used Avail Use% Mounted on
/dev/mapper/centos-root 50G 12G 39G 23% /
devtmpfs 16G 0 16G 0% /dev
tmpfs 16G 0 16G 0% /dev/shm
tmpfs 16G 1.4G 15G 9% /run
tmpfs 16G 0 16G 0% /sys/fs/cgroup
/dev/sda2 494M 123M 372M 25% /boot
/dev/mapper/centos-home 2.7T 33M 2.7T 1% /home
That’s from one datanode. The second one is nearly identical. I discovered that 50GB is actually a default. That seems really weird. Disk space is cheap. Why would you not just use most of the disk and why is it so hard to reset the default?
Adaryl "Bob" Wakefield, MBA
Principal
Mass Street Analytics, LLC
913.938.6685
www.linkedin.com/in/bobwakefieldmba
Twitter: @BobLovesData
From: Chris Nauroth
Sent: Wednesday, November 04, 2015 12:16 PM
To: user@hadoop.apache.org
Subject: Re: hadoop not using whole disk for HDFS
How are those drives partitioned? Is it possible that the directories pointed to by the dfs.datanode.data.dir property in hdfs-site.xml reside on partitions that are sized to only 100 GB? Running commands like df would be a good way to check this at the OS level, independently of Hadoop.
--Chris Nauroth
From: MBA <ad...@hotmail.com>
Reply-To: "user@hadoop.apache.org" <us...@hadoop.apache.org>
Date: Tuesday, November 3, 2015 at 11:16 AM
To: "user@hadoop.apache.org" <us...@hadoop.apache.org>
Subject: Re: hadoop not using whole disk for HDFS
Yeah. It has the current value of 1073741824 which is like 1.07 gig.
B.
From: Chris Nauroth
Sent: Tuesday, November 03, 2015 11:57 AM
To: user@hadoop.apache.org
Subject: Re: hadoop not using whole disk for HDFS
Hi Bob,
Does the hdfs-site.xml configuration file contain the property dfs.datanode.du.reserved? If this is defined, then the DataNode intentionally will not use this space for storage of replicas.
<property>
<name>dfs.datanode.du.reserved</name>
<value>0</value>
<description>Reserved space in bytes per volume. Always leave this much space free for non dfs use.
</description>
</property>
--Chris Nauroth
From: MBA <ad...@hotmail.com>
Reply-To: "user@hadoop.apache.org" <us...@hadoop.apache.org>
Date: Tuesday, November 3, 2015 at 10:51 AM
To: "user@hadoop.apache.org" <us...@hadoop.apache.org>
Subject: hadoop not using whole disk for HDFS
I’ve got the Hortonworks distro running on a three node cluster. For some reason the disk available for HDFS is MUCH less than the total disk space. Both of my data nodes have 3TB hard drives. Only 100GB of that is being used for HDFS. Is it possible that I have a setting wrong somewhere?
B.
RE: hadoop not using whole disk for HDFS
Posted by "Naganarasimha G R (Naga)" <ga...@huawei.com>.
Better would be to stop the daemons and copy the data from /hadoop/hdfs/data to /home/hdfs/data , reconfigure dfs.datanode.data.dir to /home/hdfs/data and then start the daemons. If the data is comparitively less !
Ensure you have the backup if have any critical data !
Regards,
+ Naga
________________________________
From: Adaryl "Bob" Wakefield, MBA [adaryl.wakefield@hotmail.com]
Sent: Thursday, November 05, 2015 03:40
To: user@hadoop.apache.org
Subject: Re: hadoop not using whole disk for HDFS
So like I can just create a new folder in the home directory like:
home/hdfs/data
and then set dfs.datanode.data.dir to:
/hadoop/hdfs/data,home/hdfs/data
Restart the node and that should do it correct?
Adaryl "Bob" Wakefield, MBA
Principal
Mass Street Analytics, LLC
913.938.6685
www.linkedin.com/in/bobwakefieldmba
Twitter: @BobLovesData
From: Naganarasimha G R (Naga)<ma...@huawei.com>
Sent: Wednesday, November 04, 2015 3:59 PM
To: user@hadoop.apache.org<ma...@hadoop.apache.org>
Subject: RE: hadoop not using whole disk for HDFS
Hi Bob,
Seems like you have configured to disk dir to be other than an folder in /home, if so try creating another folder and add to "dfs.datanode.data.dir" seperated by comma instead of trying to reset the default.
And its also advised not to use the root partition "/" to be configured for HDFS data dir, if the Dir usage hits the maximum then OS might fail to function properly.
Regards,
+ Naga
________________________________
From: P lva [ruvikal@gmail.com]
Sent: Thursday, November 05, 2015 03:11
To: user@hadoop.apache.org
Subject: Re: hadoop not using whole disk for HDFS
What does your dfs.datanode.data.dir point to ?
On Wed, Nov 4, 2015 at 4:14 PM, Adaryl "Bob" Wakefield, MBA <ad...@hotmail.com>> wrote:
Filesystem Size Used Avail Use% Mounted on
/dev/mapper/centos-root 50G 12G 39G 23% /
devtmpfs 16G 0 16G 0% /dev
tmpfs 16G 0 16G 0% /dev/shm
tmpfs 16G 1.4G 15G 9% /run
tmpfs 16G 0 16G 0% /sys/fs/cgroup
/dev/sda2 494M 123M 372M 25% /boot
/dev/mapper/centos-home 2.7T 33M 2.7T 1% /home
That’s from one datanode. The second one is nearly identical. I discovered that 50GB is actually a default. That seems really weird. Disk space is cheap. Why would you not just use most of the disk and why is it so hard to reset the default?
Adaryl "Bob" Wakefield, MBA
Principal
Mass Street Analytics, LLC
913.938.6685<tel:913.938.6685>
www.linkedin.com/in/bobwakefieldmba<http://www.linkedin.com/in/bobwakefieldmba>
Twitter: @BobLovesData
From: Chris Nauroth<ma...@hortonworks.com>
Sent: Wednesday, November 04, 2015 12:16 PM
To: user@hadoop.apache.org<ma...@hadoop.apache.org>
Subject: Re: hadoop not using whole disk for HDFS
How are those drives partitioned? Is it possible that the directories pointed to by the dfs.datanode.data.dir property in hdfs-site.xml reside on partitions that are sized to only 100 GB? Running commands like df would be a good way to check this at the OS level, independently of Hadoop.
--Chris Nauroth
From: MBA <ad...@hotmail.com>>
Reply-To: "user@hadoop.apache.org<ma...@hadoop.apache.org>" <us...@hadoop.apache.org>>
Date: Tuesday, November 3, 2015 at 11:16 AM
To: "user@hadoop.apache.org<ma...@hadoop.apache.org>" <us...@hadoop.apache.org>>
Subject: Re: hadoop not using whole disk for HDFS
Yeah. It has the current value of 1073741824 which is like 1.07 gig.
B.
From: Chris Nauroth<ma...@hortonworks.com>
Sent: Tuesday, November 03, 2015 11:57 AM
To: user@hadoop.apache.org<ma...@hadoop.apache.org>
Subject: Re: hadoop not using whole disk for HDFS
Hi Bob,
Does the hdfs-site.xml configuration file contain the property dfs.datanode.du.reserved? If this is defined, then the DataNode intentionally will not use this space for storage of replicas.
<property>
<name>dfs.datanode.du.reserved</name>
<value>0</value>
<description>Reserved space in bytes per volume. Always leave this much space free for non dfs use.
</description>
</property>
--Chris Nauroth
From: MBA <ad...@hotmail.com>>
Reply-To: "user@hadoop.apache.org<ma...@hadoop.apache.org>" <us...@hadoop.apache.org>>
Date: Tuesday, November 3, 2015 at 10:51 AM
To: "user@hadoop.apache.org<ma...@hadoop.apache.org>" <us...@hadoop.apache.org>>
Subject: hadoop not using whole disk for HDFS
I’ve got the Hortonworks distro running on a three node cluster. For some reason the disk available for HDFS is MUCH less than the total disk space. Both of my data nodes have 3TB hard drives. Only 100GB of that is being used for HDFS. Is it possible that I have a setting wrong somewhere?
B.
RE: hadoop not using whole disk for HDFS
Posted by "Naganarasimha G R (Naga)" <ga...@huawei.com>.
Better would be to stop the daemons and copy the data from /hadoop/hdfs/data to /home/hdfs/data , reconfigure dfs.datanode.data.dir to /home/hdfs/data and then start the daemons. If the data is comparitively less !
Ensure you have the backup if have any critical data !
Regards,
+ Naga
________________________________
From: Adaryl "Bob" Wakefield, MBA [adaryl.wakefield@hotmail.com]
Sent: Thursday, November 05, 2015 03:40
To: user@hadoop.apache.org
Subject: Re: hadoop not using whole disk for HDFS
So like I can just create a new folder in the home directory like:
home/hdfs/data
and then set dfs.datanode.data.dir to:
/hadoop/hdfs/data,home/hdfs/data
Restart the node and that should do it correct?
Adaryl "Bob" Wakefield, MBA
Principal
Mass Street Analytics, LLC
913.938.6685
www.linkedin.com/in/bobwakefieldmba
Twitter: @BobLovesData
From: Naganarasimha G R (Naga)<ma...@huawei.com>
Sent: Wednesday, November 04, 2015 3:59 PM
To: user@hadoop.apache.org<ma...@hadoop.apache.org>
Subject: RE: hadoop not using whole disk for HDFS
Hi Bob,
Seems like you have configured to disk dir to be other than an folder in /home, if so try creating another folder and add to "dfs.datanode.data.dir" seperated by comma instead of trying to reset the default.
And its also advised not to use the root partition "/" to be configured for HDFS data dir, if the Dir usage hits the maximum then OS might fail to function properly.
Regards,
+ Naga
________________________________
From: P lva [ruvikal@gmail.com]
Sent: Thursday, November 05, 2015 03:11
To: user@hadoop.apache.org
Subject: Re: hadoop not using whole disk for HDFS
What does your dfs.datanode.data.dir point to ?
On Wed, Nov 4, 2015 at 4:14 PM, Adaryl "Bob" Wakefield, MBA <ad...@hotmail.com>> wrote:
Filesystem Size Used Avail Use% Mounted on
/dev/mapper/centos-root 50G 12G 39G 23% /
devtmpfs 16G 0 16G 0% /dev
tmpfs 16G 0 16G 0% /dev/shm
tmpfs 16G 1.4G 15G 9% /run
tmpfs 16G 0 16G 0% /sys/fs/cgroup
/dev/sda2 494M 123M 372M 25% /boot
/dev/mapper/centos-home 2.7T 33M 2.7T 1% /home
That’s from one datanode. The second one is nearly identical. I discovered that 50GB is actually a default. That seems really weird. Disk space is cheap. Why would you not just use most of the disk and why is it so hard to reset the default?
Adaryl "Bob" Wakefield, MBA
Principal
Mass Street Analytics, LLC
913.938.6685<tel:913.938.6685>
www.linkedin.com/in/bobwakefieldmba<http://www.linkedin.com/in/bobwakefieldmba>
Twitter: @BobLovesData
From: Chris Nauroth<ma...@hortonworks.com>
Sent: Wednesday, November 04, 2015 12:16 PM
To: user@hadoop.apache.org<ma...@hadoop.apache.org>
Subject: Re: hadoop not using whole disk for HDFS
How are those drives partitioned? Is it possible that the directories pointed to by the dfs.datanode.data.dir property in hdfs-site.xml reside on partitions that are sized to only 100 GB? Running commands like df would be a good way to check this at the OS level, independently of Hadoop.
--Chris Nauroth
From: MBA <ad...@hotmail.com>>
Reply-To: "user@hadoop.apache.org<ma...@hadoop.apache.org>" <us...@hadoop.apache.org>>
Date: Tuesday, November 3, 2015 at 11:16 AM
To: "user@hadoop.apache.org<ma...@hadoop.apache.org>" <us...@hadoop.apache.org>>
Subject: Re: hadoop not using whole disk for HDFS
Yeah. It has the current value of 1073741824 which is like 1.07 gig.
B.
From: Chris Nauroth<ma...@hortonworks.com>
Sent: Tuesday, November 03, 2015 11:57 AM
To: user@hadoop.apache.org<ma...@hadoop.apache.org>
Subject: Re: hadoop not using whole disk for HDFS
Hi Bob,
Does the hdfs-site.xml configuration file contain the property dfs.datanode.du.reserved? If this is defined, then the DataNode intentionally will not use this space for storage of replicas.
<property>
<name>dfs.datanode.du.reserved</name>
<value>0</value>
<description>Reserved space in bytes per volume. Always leave this much space free for non dfs use.
</description>
</property>
--Chris Nauroth
From: MBA <ad...@hotmail.com>>
Reply-To: "user@hadoop.apache.org<ma...@hadoop.apache.org>" <us...@hadoop.apache.org>>
Date: Tuesday, November 3, 2015 at 10:51 AM
To: "user@hadoop.apache.org<ma...@hadoop.apache.org>" <us...@hadoop.apache.org>>
Subject: hadoop not using whole disk for HDFS
I’ve got the Hortonworks distro running on a three node cluster. For some reason the disk available for HDFS is MUCH less than the total disk space. Both of my data nodes have 3TB hard drives. Only 100GB of that is being used for HDFS. Is it possible that I have a setting wrong somewhere?
B.
RE: hadoop not using whole disk for HDFS
Posted by "Naganarasimha G R (Naga)" <ga...@huawei.com>.
Better would be to stop the daemons and copy the data from /hadoop/hdfs/data to /home/hdfs/data , reconfigure dfs.datanode.data.dir to /home/hdfs/data and then start the daemons. If the data is comparitively less !
Ensure you have the backup if have any critical data !
Regards,
+ Naga
________________________________
From: Adaryl "Bob" Wakefield, MBA [adaryl.wakefield@hotmail.com]
Sent: Thursday, November 05, 2015 03:40
To: user@hadoop.apache.org
Subject: Re: hadoop not using whole disk for HDFS
So like I can just create a new folder in the home directory like:
home/hdfs/data
and then set dfs.datanode.data.dir to:
/hadoop/hdfs/data,home/hdfs/data
Restart the node and that should do it correct?
Adaryl "Bob" Wakefield, MBA
Principal
Mass Street Analytics, LLC
913.938.6685
www.linkedin.com/in/bobwakefieldmba
Twitter: @BobLovesData
From: Naganarasimha G R (Naga)<ma...@huawei.com>
Sent: Wednesday, November 04, 2015 3:59 PM
To: user@hadoop.apache.org<ma...@hadoop.apache.org>
Subject: RE: hadoop not using whole disk for HDFS
Hi Bob,
Seems like you have configured to disk dir to be other than an folder in /home, if so try creating another folder and add to "dfs.datanode.data.dir" seperated by comma instead of trying to reset the default.
And its also advised not to use the root partition "/" to be configured for HDFS data dir, if the Dir usage hits the maximum then OS might fail to function properly.
Regards,
+ Naga
________________________________
From: P lva [ruvikal@gmail.com]
Sent: Thursday, November 05, 2015 03:11
To: user@hadoop.apache.org
Subject: Re: hadoop not using whole disk for HDFS
What does your dfs.datanode.data.dir point to ?
On Wed, Nov 4, 2015 at 4:14 PM, Adaryl "Bob" Wakefield, MBA <ad...@hotmail.com>> wrote:
Filesystem Size Used Avail Use% Mounted on
/dev/mapper/centos-root 50G 12G 39G 23% /
devtmpfs 16G 0 16G 0% /dev
tmpfs 16G 0 16G 0% /dev/shm
tmpfs 16G 1.4G 15G 9% /run
tmpfs 16G 0 16G 0% /sys/fs/cgroup
/dev/sda2 494M 123M 372M 25% /boot
/dev/mapper/centos-home 2.7T 33M 2.7T 1% /home
That’s from one datanode. The second one is nearly identical. I discovered that 50GB is actually a default. That seems really weird. Disk space is cheap. Why would you not just use most of the disk and why is it so hard to reset the default?
Adaryl "Bob" Wakefield, MBA
Principal
Mass Street Analytics, LLC
913.938.6685<tel:913.938.6685>
www.linkedin.com/in/bobwakefieldmba<http://www.linkedin.com/in/bobwakefieldmba>
Twitter: @BobLovesData
From: Chris Nauroth<ma...@hortonworks.com>
Sent: Wednesday, November 04, 2015 12:16 PM
To: user@hadoop.apache.org<ma...@hadoop.apache.org>
Subject: Re: hadoop not using whole disk for HDFS
How are those drives partitioned? Is it possible that the directories pointed to by the dfs.datanode.data.dir property in hdfs-site.xml reside on partitions that are sized to only 100 GB? Running commands like df would be a good way to check this at the OS level, independently of Hadoop.
--Chris Nauroth
From: MBA <ad...@hotmail.com>>
Reply-To: "user@hadoop.apache.org<ma...@hadoop.apache.org>" <us...@hadoop.apache.org>>
Date: Tuesday, November 3, 2015 at 11:16 AM
To: "user@hadoop.apache.org<ma...@hadoop.apache.org>" <us...@hadoop.apache.org>>
Subject: Re: hadoop not using whole disk for HDFS
Yeah. It has the current value of 1073741824 which is like 1.07 gig.
B.
From: Chris Nauroth<ma...@hortonworks.com>
Sent: Tuesday, November 03, 2015 11:57 AM
To: user@hadoop.apache.org<ma...@hadoop.apache.org>
Subject: Re: hadoop not using whole disk for HDFS
Hi Bob,
Does the hdfs-site.xml configuration file contain the property dfs.datanode.du.reserved? If this is defined, then the DataNode intentionally will not use this space for storage of replicas.
<property>
<name>dfs.datanode.du.reserved</name>
<value>0</value>
<description>Reserved space in bytes per volume. Always leave this much space free for non dfs use.
</description>
</property>
--Chris Nauroth
From: MBA <ad...@hotmail.com>>
Reply-To: "user@hadoop.apache.org<ma...@hadoop.apache.org>" <us...@hadoop.apache.org>>
Date: Tuesday, November 3, 2015 at 10:51 AM
To: "user@hadoop.apache.org<ma...@hadoop.apache.org>" <us...@hadoop.apache.org>>
Subject: hadoop not using whole disk for HDFS
I’ve got the Hortonworks distro running on a three node cluster. For some reason the disk available for HDFS is MUCH less than the total disk space. Both of my data nodes have 3TB hard drives. Only 100GB of that is being used for HDFS. Is it possible that I have a setting wrong somewhere?
B.
RE: hadoop not using whole disk for HDFS
Posted by "Naganarasimha G R (Naga)" <ga...@huawei.com>.
Better would be to stop the daemons and copy the data from /hadoop/hdfs/data to /home/hdfs/data , reconfigure dfs.datanode.data.dir to /home/hdfs/data and then start the daemons. If the data is comparitively less !
Ensure you have the backup if have any critical data !
Regards,
+ Naga
________________________________
From: Adaryl "Bob" Wakefield, MBA [adaryl.wakefield@hotmail.com]
Sent: Thursday, November 05, 2015 03:40
To: user@hadoop.apache.org
Subject: Re: hadoop not using whole disk for HDFS
So like I can just create a new folder in the home directory like:
home/hdfs/data
and then set dfs.datanode.data.dir to:
/hadoop/hdfs/data,home/hdfs/data
Restart the node and that should do it correct?
Adaryl "Bob" Wakefield, MBA
Principal
Mass Street Analytics, LLC
913.938.6685
www.linkedin.com/in/bobwakefieldmba
Twitter: @BobLovesData
From: Naganarasimha G R (Naga)<ma...@huawei.com>
Sent: Wednesday, November 04, 2015 3:59 PM
To: user@hadoop.apache.org<ma...@hadoop.apache.org>
Subject: RE: hadoop not using whole disk for HDFS
Hi Bob,
Seems like you have configured to disk dir to be other than an folder in /home, if so try creating another folder and add to "dfs.datanode.data.dir" seperated by comma instead of trying to reset the default.
And its also advised not to use the root partition "/" to be configured for HDFS data dir, if the Dir usage hits the maximum then OS might fail to function properly.
Regards,
+ Naga
________________________________
From: P lva [ruvikal@gmail.com]
Sent: Thursday, November 05, 2015 03:11
To: user@hadoop.apache.org
Subject: Re: hadoop not using whole disk for HDFS
What does your dfs.datanode.data.dir point to ?
On Wed, Nov 4, 2015 at 4:14 PM, Adaryl "Bob" Wakefield, MBA <ad...@hotmail.com>> wrote:
Filesystem Size Used Avail Use% Mounted on
/dev/mapper/centos-root 50G 12G 39G 23% /
devtmpfs 16G 0 16G 0% /dev
tmpfs 16G 0 16G 0% /dev/shm
tmpfs 16G 1.4G 15G 9% /run
tmpfs 16G 0 16G 0% /sys/fs/cgroup
/dev/sda2 494M 123M 372M 25% /boot
/dev/mapper/centos-home 2.7T 33M 2.7T 1% /home
That’s from one datanode. The second one is nearly identical. I discovered that 50GB is actually a default. That seems really weird. Disk space is cheap. Why would you not just use most of the disk and why is it so hard to reset the default?
Adaryl "Bob" Wakefield, MBA
Principal
Mass Street Analytics, LLC
913.938.6685<tel:913.938.6685>
www.linkedin.com/in/bobwakefieldmba<http://www.linkedin.com/in/bobwakefieldmba>
Twitter: @BobLovesData
From: Chris Nauroth<ma...@hortonworks.com>
Sent: Wednesday, November 04, 2015 12:16 PM
To: user@hadoop.apache.org<ma...@hadoop.apache.org>
Subject: Re: hadoop not using whole disk for HDFS
How are those drives partitioned? Is it possible that the directories pointed to by the dfs.datanode.data.dir property in hdfs-site.xml reside on partitions that are sized to only 100 GB? Running commands like df would be a good way to check this at the OS level, independently of Hadoop.
--Chris Nauroth
From: MBA <ad...@hotmail.com>>
Reply-To: "user@hadoop.apache.org<ma...@hadoop.apache.org>" <us...@hadoop.apache.org>>
Date: Tuesday, November 3, 2015 at 11:16 AM
To: "user@hadoop.apache.org<ma...@hadoop.apache.org>" <us...@hadoop.apache.org>>
Subject: Re: hadoop not using whole disk for HDFS
Yeah. It has the current value of 1073741824 which is like 1.07 gig.
B.
From: Chris Nauroth<ma...@hortonworks.com>
Sent: Tuesday, November 03, 2015 11:57 AM
To: user@hadoop.apache.org<ma...@hadoop.apache.org>
Subject: Re: hadoop not using whole disk for HDFS
Hi Bob,
Does the hdfs-site.xml configuration file contain the property dfs.datanode.du.reserved? If this is defined, then the DataNode intentionally will not use this space for storage of replicas.
<property>
<name>dfs.datanode.du.reserved</name>
<value>0</value>
<description>Reserved space in bytes per volume. Always leave this much space free for non dfs use.
</description>
</property>
--Chris Nauroth
From: MBA <ad...@hotmail.com>>
Reply-To: "user@hadoop.apache.org<ma...@hadoop.apache.org>" <us...@hadoop.apache.org>>
Date: Tuesday, November 3, 2015 at 10:51 AM
To: "user@hadoop.apache.org<ma...@hadoop.apache.org>" <us...@hadoop.apache.org>>
Subject: hadoop not using whole disk for HDFS
I’ve got the Hortonworks distro running on a three node cluster. For some reason the disk available for HDFS is MUCH less than the total disk space. Both of my data nodes have 3TB hard drives. Only 100GB of that is being used for HDFS. Is it possible that I have a setting wrong somewhere?
B.
Re: hadoop not using whole disk for HDFS
Posted by "Adaryl \"Bob\" Wakefield, MBA" <ad...@hotmail.com>.
So like I can just create a new folder in the home directory like:
home/hdfs/data
and then set dfs.datanode.data.dir to:
/hadoop/hdfs/data,home/hdfs/data
Restart the node and that should do it correct?
Adaryl "Bob" Wakefield, MBA
Principal
Mass Street Analytics, LLC
913.938.6685
www.linkedin.com/in/bobwakefieldmba
Twitter: @BobLovesData
From: Naganarasimha G R (Naga)
Sent: Wednesday, November 04, 2015 3:59 PM
To: user@hadoop.apache.org
Subject: RE: hadoop not using whole disk for HDFS
Hi Bob,
Seems like you have configured to disk dir to be other than an folder in /home, if so try creating another folder and add to "dfs.datanode.data.dir" seperated by comma instead of trying to reset the default.
And its also advised not to use the root partition "/" to be configured for HDFS data dir, if the Dir usage hits the maximum then OS might fail to function properly.
Regards,
+ Naga
--------------------------------------------------------------------------------
From: P lva [ruvikal@gmail.com]
Sent: Thursday, November 05, 2015 03:11
To: user@hadoop.apache.org
Subject: Re: hadoop not using whole disk for HDFS
What does your dfs.datanode.data.dir point to ?
On Wed, Nov 4, 2015 at 4:14 PM, Adaryl "Bob" Wakefield, MBA <ad...@hotmail.com> wrote:
Filesystem Size Used Avail Use% Mounted on
/dev/mapper/centos-root 50G 12G 39G 23% /
devtmpfs 16G 0 16G 0% /dev
tmpfs 16G 0 16G 0% /dev/shm
tmpfs 16G 1.4G 15G 9% /run
tmpfs 16G 0 16G 0% /sys/fs/cgroup
/dev/sda2 494M 123M 372M 25% /boot
/dev/mapper/centos-home 2.7T 33M 2.7T 1% /home
That’s from one datanode. The second one is nearly identical. I discovered that 50GB is actually a default. That seems really weird. Disk space is cheap. Why would you not just use most of the disk and why is it so hard to reset the default?
Adaryl "Bob" Wakefield, MBA
Principal
Mass Street Analytics, LLC
913.938.6685
www.linkedin.com/in/bobwakefieldmba
Twitter: @BobLovesData
From: Chris Nauroth
Sent: Wednesday, November 04, 2015 12:16 PM
To: user@hadoop.apache.org
Subject: Re: hadoop not using whole disk for HDFS
How are those drives partitioned? Is it possible that the directories pointed to by the dfs.datanode.data.dir property in hdfs-site.xml reside on partitions that are sized to only 100 GB? Running commands like df would be a good way to check this at the OS level, independently of Hadoop.
--Chris Nauroth
From: MBA <ad...@hotmail.com>
Reply-To: "user@hadoop.apache.org" <us...@hadoop.apache.org>
Date: Tuesday, November 3, 2015 at 11:16 AM
To: "user@hadoop.apache.org" <us...@hadoop.apache.org>
Subject: Re: hadoop not using whole disk for HDFS
Yeah. It has the current value of 1073741824 which is like 1.07 gig.
B.
From: Chris Nauroth
Sent: Tuesday, November 03, 2015 11:57 AM
To: user@hadoop.apache.org
Subject: Re: hadoop not using whole disk for HDFS
Hi Bob,
Does the hdfs-site.xml configuration file contain the property dfs.datanode.du.reserved? If this is defined, then the DataNode intentionally will not use this space for storage of replicas.
<property>
<name>dfs.datanode.du.reserved</name>
<value>0</value>
<description>Reserved space in bytes per volume. Always leave this much space free for non dfs use.
</description>
</property>
--Chris Nauroth
From: MBA <ad...@hotmail.com>
Reply-To: "user@hadoop.apache.org" <us...@hadoop.apache.org>
Date: Tuesday, November 3, 2015 at 10:51 AM
To: "user@hadoop.apache.org" <us...@hadoop.apache.org>
Subject: hadoop not using whole disk for HDFS
I’ve got the Hortonworks distro running on a three node cluster. For some reason the disk available for HDFS is MUCH less than the total disk space. Both of my data nodes have 3TB hard drives. Only 100GB of that is being used for HDFS. Is it possible that I have a setting wrong somewhere?
B.
Re: hadoop not using whole disk for HDFS
Posted by "Adaryl \"Bob\" Wakefield, MBA" <ad...@hotmail.com>.
So like I can just create a new folder in the home directory like:
home/hdfs/data
and then set dfs.datanode.data.dir to:
/hadoop/hdfs/data,home/hdfs/data
Restart the node and that should do it correct?
Adaryl "Bob" Wakefield, MBA
Principal
Mass Street Analytics, LLC
913.938.6685
www.linkedin.com/in/bobwakefieldmba
Twitter: @BobLovesData
From: Naganarasimha G R (Naga)
Sent: Wednesday, November 04, 2015 3:59 PM
To: user@hadoop.apache.org
Subject: RE: hadoop not using whole disk for HDFS
Hi Bob,
Seems like you have configured to disk dir to be other than an folder in /home, if so try creating another folder and add to "dfs.datanode.data.dir" seperated by comma instead of trying to reset the default.
And its also advised not to use the root partition "/" to be configured for HDFS data dir, if the Dir usage hits the maximum then OS might fail to function properly.
Regards,
+ Naga
--------------------------------------------------------------------------------
From: P lva [ruvikal@gmail.com]
Sent: Thursday, November 05, 2015 03:11
To: user@hadoop.apache.org
Subject: Re: hadoop not using whole disk for HDFS
What does your dfs.datanode.data.dir point to ?
On Wed, Nov 4, 2015 at 4:14 PM, Adaryl "Bob" Wakefield, MBA <ad...@hotmail.com> wrote:
Filesystem Size Used Avail Use% Mounted on
/dev/mapper/centos-root 50G 12G 39G 23% /
devtmpfs 16G 0 16G 0% /dev
tmpfs 16G 0 16G 0% /dev/shm
tmpfs 16G 1.4G 15G 9% /run
tmpfs 16G 0 16G 0% /sys/fs/cgroup
/dev/sda2 494M 123M 372M 25% /boot
/dev/mapper/centos-home 2.7T 33M 2.7T 1% /home
That’s from one datanode. The second one is nearly identical. I discovered that 50GB is actually a default. That seems really weird. Disk space is cheap. Why would you not just use most of the disk and why is it so hard to reset the default?
Adaryl "Bob" Wakefield, MBA
Principal
Mass Street Analytics, LLC
913.938.6685
www.linkedin.com/in/bobwakefieldmba
Twitter: @BobLovesData
From: Chris Nauroth
Sent: Wednesday, November 04, 2015 12:16 PM
To: user@hadoop.apache.org
Subject: Re: hadoop not using whole disk for HDFS
How are those drives partitioned? Is it possible that the directories pointed to by the dfs.datanode.data.dir property in hdfs-site.xml reside on partitions that are sized to only 100 GB? Running commands like df would be a good way to check this at the OS level, independently of Hadoop.
--Chris Nauroth
From: MBA <ad...@hotmail.com>
Reply-To: "user@hadoop.apache.org" <us...@hadoop.apache.org>
Date: Tuesday, November 3, 2015 at 11:16 AM
To: "user@hadoop.apache.org" <us...@hadoop.apache.org>
Subject: Re: hadoop not using whole disk for HDFS
Yeah. It has the current value of 1073741824 which is like 1.07 gig.
B.
From: Chris Nauroth
Sent: Tuesday, November 03, 2015 11:57 AM
To: user@hadoop.apache.org
Subject: Re: hadoop not using whole disk for HDFS
Hi Bob,
Does the hdfs-site.xml configuration file contain the property dfs.datanode.du.reserved? If this is defined, then the DataNode intentionally will not use this space for storage of replicas.
<property>
<name>dfs.datanode.du.reserved</name>
<value>0</value>
<description>Reserved space in bytes per volume. Always leave this much space free for non dfs use.
</description>
</property>
--Chris Nauroth
From: MBA <ad...@hotmail.com>
Reply-To: "user@hadoop.apache.org" <us...@hadoop.apache.org>
Date: Tuesday, November 3, 2015 at 10:51 AM
To: "user@hadoop.apache.org" <us...@hadoop.apache.org>
Subject: hadoop not using whole disk for HDFS
I’ve got the Hortonworks distro running on a three node cluster. For some reason the disk available for HDFS is MUCH less than the total disk space. Both of my data nodes have 3TB hard drives. Only 100GB of that is being used for HDFS. Is it possible that I have a setting wrong somewhere?
B.
Re: hadoop not using whole disk for HDFS
Posted by "Adaryl \"Bob\" Wakefield, MBA" <ad...@hotmail.com>.
So like I can just create a new folder in the home directory like:
home/hdfs/data
and then set dfs.datanode.data.dir to:
/hadoop/hdfs/data,home/hdfs/data
Restart the node and that should do it correct?
Adaryl "Bob" Wakefield, MBA
Principal
Mass Street Analytics, LLC
913.938.6685
www.linkedin.com/in/bobwakefieldmba
Twitter: @BobLovesData
From: Naganarasimha G R (Naga)
Sent: Wednesday, November 04, 2015 3:59 PM
To: user@hadoop.apache.org
Subject: RE: hadoop not using whole disk for HDFS
Hi Bob,
Seems like you have configured to disk dir to be other than an folder in /home, if so try creating another folder and add to "dfs.datanode.data.dir" seperated by comma instead of trying to reset the default.
And its also advised not to use the root partition "/" to be configured for HDFS data dir, if the Dir usage hits the maximum then OS might fail to function properly.
Regards,
+ Naga
--------------------------------------------------------------------------------
From: P lva [ruvikal@gmail.com]
Sent: Thursday, November 05, 2015 03:11
To: user@hadoop.apache.org
Subject: Re: hadoop not using whole disk for HDFS
What does your dfs.datanode.data.dir point to ?
On Wed, Nov 4, 2015 at 4:14 PM, Adaryl "Bob" Wakefield, MBA <ad...@hotmail.com> wrote:
Filesystem Size Used Avail Use% Mounted on
/dev/mapper/centos-root 50G 12G 39G 23% /
devtmpfs 16G 0 16G 0% /dev
tmpfs 16G 0 16G 0% /dev/shm
tmpfs 16G 1.4G 15G 9% /run
tmpfs 16G 0 16G 0% /sys/fs/cgroup
/dev/sda2 494M 123M 372M 25% /boot
/dev/mapper/centos-home 2.7T 33M 2.7T 1% /home
That’s from one datanode. The second one is nearly identical. I discovered that 50GB is actually a default. That seems really weird. Disk space is cheap. Why would you not just use most of the disk and why is it so hard to reset the default?
Adaryl "Bob" Wakefield, MBA
Principal
Mass Street Analytics, LLC
913.938.6685
www.linkedin.com/in/bobwakefieldmba
Twitter: @BobLovesData
From: Chris Nauroth
Sent: Wednesday, November 04, 2015 12:16 PM
To: user@hadoop.apache.org
Subject: Re: hadoop not using whole disk for HDFS
How are those drives partitioned? Is it possible that the directories pointed to by the dfs.datanode.data.dir property in hdfs-site.xml reside on partitions that are sized to only 100 GB? Running commands like df would be a good way to check this at the OS level, independently of Hadoop.
--Chris Nauroth
From: MBA <ad...@hotmail.com>
Reply-To: "user@hadoop.apache.org" <us...@hadoop.apache.org>
Date: Tuesday, November 3, 2015 at 11:16 AM
To: "user@hadoop.apache.org" <us...@hadoop.apache.org>
Subject: Re: hadoop not using whole disk for HDFS
Yeah. It has the current value of 1073741824 which is like 1.07 gig.
B.
From: Chris Nauroth
Sent: Tuesday, November 03, 2015 11:57 AM
To: user@hadoop.apache.org
Subject: Re: hadoop not using whole disk for HDFS
Hi Bob,
Does the hdfs-site.xml configuration file contain the property dfs.datanode.du.reserved? If this is defined, then the DataNode intentionally will not use this space for storage of replicas.
<property>
<name>dfs.datanode.du.reserved</name>
<value>0</value>
<description>Reserved space in bytes per volume. Always leave this much space free for non dfs use.
</description>
</property>
--Chris Nauroth
From: MBA <ad...@hotmail.com>
Reply-To: "user@hadoop.apache.org" <us...@hadoop.apache.org>
Date: Tuesday, November 3, 2015 at 10:51 AM
To: "user@hadoop.apache.org" <us...@hadoop.apache.org>
Subject: hadoop not using whole disk for HDFS
I’ve got the Hortonworks distro running on a three node cluster. For some reason the disk available for HDFS is MUCH less than the total disk space. Both of my data nodes have 3TB hard drives. Only 100GB of that is being used for HDFS. Is it possible that I have a setting wrong somewhere?
B.
Re: hadoop not using whole disk for HDFS
Posted by "Adaryl \"Bob\" Wakefield, MBA" <ad...@hotmail.com>.
So like I can just create a new folder in the home directory like:
home/hdfs/data
and then set dfs.datanode.data.dir to:
/hadoop/hdfs/data,home/hdfs/data
Restart the node and that should do it correct?
Adaryl "Bob" Wakefield, MBA
Principal
Mass Street Analytics, LLC
913.938.6685
www.linkedin.com/in/bobwakefieldmba
Twitter: @BobLovesData
From: Naganarasimha G R (Naga)
Sent: Wednesday, November 04, 2015 3:59 PM
To: user@hadoop.apache.org
Subject: RE: hadoop not using whole disk for HDFS
Hi Bob,
Seems like you have configured to disk dir to be other than an folder in /home, if so try creating another folder and add to "dfs.datanode.data.dir" seperated by comma instead of trying to reset the default.
And its also advised not to use the root partition "/" to be configured for HDFS data dir, if the Dir usage hits the maximum then OS might fail to function properly.
Regards,
+ Naga
--------------------------------------------------------------------------------
From: P lva [ruvikal@gmail.com]
Sent: Thursday, November 05, 2015 03:11
To: user@hadoop.apache.org
Subject: Re: hadoop not using whole disk for HDFS
What does your dfs.datanode.data.dir point to ?
On Wed, Nov 4, 2015 at 4:14 PM, Adaryl "Bob" Wakefield, MBA <ad...@hotmail.com> wrote:
Filesystem Size Used Avail Use% Mounted on
/dev/mapper/centos-root 50G 12G 39G 23% /
devtmpfs 16G 0 16G 0% /dev
tmpfs 16G 0 16G 0% /dev/shm
tmpfs 16G 1.4G 15G 9% /run
tmpfs 16G 0 16G 0% /sys/fs/cgroup
/dev/sda2 494M 123M 372M 25% /boot
/dev/mapper/centos-home 2.7T 33M 2.7T 1% /home
That’s from one datanode. The second one is nearly identical. I discovered that 50GB is actually a default. That seems really weird. Disk space is cheap. Why would you not just use most of the disk and why is it so hard to reset the default?
Adaryl "Bob" Wakefield, MBA
Principal
Mass Street Analytics, LLC
913.938.6685
www.linkedin.com/in/bobwakefieldmba
Twitter: @BobLovesData
From: Chris Nauroth
Sent: Wednesday, November 04, 2015 12:16 PM
To: user@hadoop.apache.org
Subject: Re: hadoop not using whole disk for HDFS
How are those drives partitioned? Is it possible that the directories pointed to by the dfs.datanode.data.dir property in hdfs-site.xml reside on partitions that are sized to only 100 GB? Running commands like df would be a good way to check this at the OS level, independently of Hadoop.
--Chris Nauroth
From: MBA <ad...@hotmail.com>
Reply-To: "user@hadoop.apache.org" <us...@hadoop.apache.org>
Date: Tuesday, November 3, 2015 at 11:16 AM
To: "user@hadoop.apache.org" <us...@hadoop.apache.org>
Subject: Re: hadoop not using whole disk for HDFS
Yeah. It has the current value of 1073741824 which is like 1.07 gig.
B.
From: Chris Nauroth
Sent: Tuesday, November 03, 2015 11:57 AM
To: user@hadoop.apache.org
Subject: Re: hadoop not using whole disk for HDFS
Hi Bob,
Does the hdfs-site.xml configuration file contain the property dfs.datanode.du.reserved? If this is defined, then the DataNode intentionally will not use this space for storage of replicas.
<property>
<name>dfs.datanode.du.reserved</name>
<value>0</value>
<description>Reserved space in bytes per volume. Always leave this much space free for non dfs use.
</description>
</property>
--Chris Nauroth
From: MBA <ad...@hotmail.com>
Reply-To: "user@hadoop.apache.org" <us...@hadoop.apache.org>
Date: Tuesday, November 3, 2015 at 10:51 AM
To: "user@hadoop.apache.org" <us...@hadoop.apache.org>
Subject: hadoop not using whole disk for HDFS
I’ve got the Hortonworks distro running on a three node cluster. For some reason the disk available for HDFS is MUCH less than the total disk space. Both of my data nodes have 3TB hard drives. Only 100GB of that is being used for HDFS. Is it possible that I have a setting wrong somewhere?
B.
RE: hadoop not using whole disk for HDFS
Posted by "Naganarasimha G R (Naga)" <ga...@huawei.com>.
Hi Bob,
Seems like you have configured to disk dir to be other than an folder in /home, if so try creating another folder and add to "dfs.datanode.data.dir" seperated by comma instead of trying to reset the default.
And its also advised not to use the root partition "/" to be configured for HDFS data dir, if the Dir usage hits the maximum then OS might fail to function properly.
Regards,
+ Naga
________________________________
From: P lva [ruvikal@gmail.com]
Sent: Thursday, November 05, 2015 03:11
To: user@hadoop.apache.org
Subject: Re: hadoop not using whole disk for HDFS
What does your dfs.datanode.data.dir point to ?
On Wed, Nov 4, 2015 at 4:14 PM, Adaryl "Bob" Wakefield, MBA <ad...@hotmail.com>> wrote:
Filesystem Size Used Avail Use% Mounted on
/dev/mapper/centos-root 50G 12G 39G 23% /
devtmpfs 16G 0 16G 0% /dev
tmpfs 16G 0 16G 0% /dev/shm
tmpfs 16G 1.4G 15G 9% /run
tmpfs 16G 0 16G 0% /sys/fs/cgroup
/dev/sda2 494M 123M 372M 25% /boot
/dev/mapper/centos-home 2.7T 33M 2.7T 1% /home
That’s from one datanode. The second one is nearly identical. I discovered that 50GB is actually a default. That seems really weird. Disk space is cheap. Why would you not just use most of the disk and why is it so hard to reset the default?
Adaryl "Bob" Wakefield, MBA
Principal
Mass Street Analytics, LLC
913.938.6685<tel:913.938.6685>
www.linkedin.com/in/bobwakefieldmba<http://www.linkedin.com/in/bobwakefieldmba>
Twitter: @BobLovesData
From: Chris Nauroth<ma...@hortonworks.com>
Sent: Wednesday, November 04, 2015 12:16 PM
To: user@hadoop.apache.org<ma...@hadoop.apache.org>
Subject: Re: hadoop not using whole disk for HDFS
How are those drives partitioned? Is it possible that the directories pointed to by the dfs.datanode.data.dir property in hdfs-site.xml reside on partitions that are sized to only 100 GB? Running commands like df would be a good way to check this at the OS level, independently of Hadoop.
--Chris Nauroth
From: MBA <ad...@hotmail.com>>
Reply-To: "user@hadoop.apache.org<ma...@hadoop.apache.org>" <us...@hadoop.apache.org>>
Date: Tuesday, November 3, 2015 at 11:16 AM
To: "user@hadoop.apache.org<ma...@hadoop.apache.org>" <us...@hadoop.apache.org>>
Subject: Re: hadoop not using whole disk for HDFS
Yeah. It has the current value of 1073741824 which is like 1.07 gig.
B.
From: Chris Nauroth<ma...@hortonworks.com>
Sent: Tuesday, November 03, 2015 11:57 AM
To: user@hadoop.apache.org<ma...@hadoop.apache.org>
Subject: Re: hadoop not using whole disk for HDFS
Hi Bob,
Does the hdfs-site.xml configuration file contain the property dfs.datanode.du.reserved? If this is defined, then the DataNode intentionally will not use this space for storage of replicas.
<property>
<name>dfs.datanode.du.reserved</name>
<value>0</value>
<description>Reserved space in bytes per volume. Always leave this much space free for non dfs use.
</description>
</property>
--Chris Nauroth
From: MBA <ad...@hotmail.com>>
Reply-To: "user@hadoop.apache.org<ma...@hadoop.apache.org>" <us...@hadoop.apache.org>>
Date: Tuesday, November 3, 2015 at 10:51 AM
To: "user@hadoop.apache.org<ma...@hadoop.apache.org>" <us...@hadoop.apache.org>>
Subject: hadoop not using whole disk for HDFS
I’ve got the Hortonworks distro running on a three node cluster. For some reason the disk available for HDFS is MUCH less than the total disk space. Both of my data nodes have 3TB hard drives. Only 100GB of that is being used for HDFS. Is it possible that I have a setting wrong somewhere?
B.
Re: hadoop not using whole disk for HDFS
Posted by "Adaryl \"Bob\" Wakefield, MBA" <ad...@hotmail.com>.
/hadoop/hdfs/data
Adaryl "Bob" Wakefield, MBA
Principal
Mass Street Analytics, LLC
913.938.6685
www.linkedin.com/in/bobwakefieldmba
Twitter: @BobLovesData
From: P lva
Sent: Wednesday, November 04, 2015 3:41 PM
To: user@hadoop.apache.org
Subject: Re: hadoop not using whole disk for HDFS
What does your dfs.datanode.data.dir point to ?
On Wed, Nov 4, 2015 at 4:14 PM, Adaryl "Bob" Wakefield, MBA <ad...@hotmail.com> wrote:
Filesystem Size Used Avail Use% Mounted on
/dev/mapper/centos-root 50G 12G 39G 23% /
devtmpfs 16G 0 16G 0% /dev
tmpfs 16G 0 16G 0% /dev/shm
tmpfs 16G 1.4G 15G 9% /run
tmpfs 16G 0 16G 0% /sys/fs/cgroup
/dev/sda2 494M 123M 372M 25% /boot
/dev/mapper/centos-home 2.7T 33M 2.7T 1% /home
That’s from one datanode. The second one is nearly identical. I discovered that 50GB is actually a default. That seems really weird. Disk space is cheap. Why would you not just use most of the disk and why is it so hard to reset the default?
Adaryl "Bob" Wakefield, MBA
Principal
Mass Street Analytics, LLC
913.938.6685
www.linkedin.com/in/bobwakefieldmba
Twitter: @BobLovesData
From: Chris Nauroth
Sent: Wednesday, November 04, 2015 12:16 PM
To: user@hadoop.apache.org
Subject: Re: hadoop not using whole disk for HDFS
How are those drives partitioned? Is it possible that the directories pointed to by the dfs.datanode.data.dir property in hdfs-site.xml reside on partitions that are sized to only 100 GB? Running commands like df would be a good way to check this at the OS level, independently of Hadoop.
--Chris Nauroth
From: MBA <ad...@hotmail.com>
Reply-To: "user@hadoop.apache.org" <us...@hadoop.apache.org>
Date: Tuesday, November 3, 2015 at 11:16 AM
To: "user@hadoop.apache.org" <us...@hadoop.apache.org>
Subject: Re: hadoop not using whole disk for HDFS
Yeah. It has the current value of 1073741824 which is like 1.07 gig.
B.
From: Chris Nauroth
Sent: Tuesday, November 03, 2015 11:57 AM
To: user@hadoop.apache.org
Subject: Re: hadoop not using whole disk for HDFS
Hi Bob,
Does the hdfs-site.xml configuration file contain the property dfs.datanode.du.reserved? If this is defined, then the DataNode intentionally will not use this space for storage of replicas.
<property>
<name>dfs.datanode.du.reserved</name>
<value>0</value>
<description>Reserved space in bytes per volume. Always leave this much space free for non dfs use.
</description>
</property>
--Chris Nauroth
From: MBA <ad...@hotmail.com>
Reply-To: "user@hadoop.apache.org" <us...@hadoop.apache.org>
Date: Tuesday, November 3, 2015 at 10:51 AM
To: "user@hadoop.apache.org" <us...@hadoop.apache.org>
Subject: hadoop not using whole disk for HDFS
I’ve got the Hortonworks distro running on a three node cluster. For some reason the disk available for HDFS is MUCH less than the total disk space. Both of my data nodes have 3TB hard drives. Only 100GB of that is being used for HDFS. Is it possible that I have a setting wrong somewhere?
B.
Re: hadoop not using whole disk for HDFS
Posted by "Adaryl \"Bob\" Wakefield, MBA" <ad...@hotmail.com>.
/hadoop/hdfs/data
Adaryl "Bob" Wakefield, MBA
Principal
Mass Street Analytics, LLC
913.938.6685
www.linkedin.com/in/bobwakefieldmba
Twitter: @BobLovesData
From: P lva
Sent: Wednesday, November 04, 2015 3:41 PM
To: user@hadoop.apache.org
Subject: Re: hadoop not using whole disk for HDFS
What does your dfs.datanode.data.dir point to ?
On Wed, Nov 4, 2015 at 4:14 PM, Adaryl "Bob" Wakefield, MBA <ad...@hotmail.com> wrote:
Filesystem Size Used Avail Use% Mounted on
/dev/mapper/centos-root 50G 12G 39G 23% /
devtmpfs 16G 0 16G 0% /dev
tmpfs 16G 0 16G 0% /dev/shm
tmpfs 16G 1.4G 15G 9% /run
tmpfs 16G 0 16G 0% /sys/fs/cgroup
/dev/sda2 494M 123M 372M 25% /boot
/dev/mapper/centos-home 2.7T 33M 2.7T 1% /home
That’s from one datanode. The second one is nearly identical. I discovered that 50GB is actually a default. That seems really weird. Disk space is cheap. Why would you not just use most of the disk and why is it so hard to reset the default?
Adaryl "Bob" Wakefield, MBA
Principal
Mass Street Analytics, LLC
913.938.6685
www.linkedin.com/in/bobwakefieldmba
Twitter: @BobLovesData
From: Chris Nauroth
Sent: Wednesday, November 04, 2015 12:16 PM
To: user@hadoop.apache.org
Subject: Re: hadoop not using whole disk for HDFS
How are those drives partitioned? Is it possible that the directories pointed to by the dfs.datanode.data.dir property in hdfs-site.xml reside on partitions that are sized to only 100 GB? Running commands like df would be a good way to check this at the OS level, independently of Hadoop.
--Chris Nauroth
From: MBA <ad...@hotmail.com>
Reply-To: "user@hadoop.apache.org" <us...@hadoop.apache.org>
Date: Tuesday, November 3, 2015 at 11:16 AM
To: "user@hadoop.apache.org" <us...@hadoop.apache.org>
Subject: Re: hadoop not using whole disk for HDFS
Yeah. It has the current value of 1073741824 which is like 1.07 gig.
B.
From: Chris Nauroth
Sent: Tuesday, November 03, 2015 11:57 AM
To: user@hadoop.apache.org
Subject: Re: hadoop not using whole disk for HDFS
Hi Bob,
Does the hdfs-site.xml configuration file contain the property dfs.datanode.du.reserved? If this is defined, then the DataNode intentionally will not use this space for storage of replicas.
<property>
<name>dfs.datanode.du.reserved</name>
<value>0</value>
<description>Reserved space in bytes per volume. Always leave this much space free for non dfs use.
</description>
</property>
--Chris Nauroth
From: MBA <ad...@hotmail.com>
Reply-To: "user@hadoop.apache.org" <us...@hadoop.apache.org>
Date: Tuesday, November 3, 2015 at 10:51 AM
To: "user@hadoop.apache.org" <us...@hadoop.apache.org>
Subject: hadoop not using whole disk for HDFS
I’ve got the Hortonworks distro running on a three node cluster. For some reason the disk available for HDFS is MUCH less than the total disk space. Both of my data nodes have 3TB hard drives. Only 100GB of that is being used for HDFS. Is it possible that I have a setting wrong somewhere?
B.
Re: hadoop not using whole disk for HDFS
Posted by "Adaryl \"Bob\" Wakefield, MBA" <ad...@hotmail.com>.
/hadoop/hdfs/data
Adaryl "Bob" Wakefield, MBA
Principal
Mass Street Analytics, LLC
913.938.6685
www.linkedin.com/in/bobwakefieldmba
Twitter: @BobLovesData
From: P lva
Sent: Wednesday, November 04, 2015 3:41 PM
To: user@hadoop.apache.org
Subject: Re: hadoop not using whole disk for HDFS
What does your dfs.datanode.data.dir point to ?
On Wed, Nov 4, 2015 at 4:14 PM, Adaryl "Bob" Wakefield, MBA <ad...@hotmail.com> wrote:
Filesystem Size Used Avail Use% Mounted on
/dev/mapper/centos-root 50G 12G 39G 23% /
devtmpfs 16G 0 16G 0% /dev
tmpfs 16G 0 16G 0% /dev/shm
tmpfs 16G 1.4G 15G 9% /run
tmpfs 16G 0 16G 0% /sys/fs/cgroup
/dev/sda2 494M 123M 372M 25% /boot
/dev/mapper/centos-home 2.7T 33M 2.7T 1% /home
That’s from one datanode. The second one is nearly identical. I discovered that 50GB is actually a default. That seems really weird. Disk space is cheap. Why would you not just use most of the disk and why is it so hard to reset the default?
Adaryl "Bob" Wakefield, MBA
Principal
Mass Street Analytics, LLC
913.938.6685
www.linkedin.com/in/bobwakefieldmba
Twitter: @BobLovesData
From: Chris Nauroth
Sent: Wednesday, November 04, 2015 12:16 PM
To: user@hadoop.apache.org
Subject: Re: hadoop not using whole disk for HDFS
How are those drives partitioned? Is it possible that the directories pointed to by the dfs.datanode.data.dir property in hdfs-site.xml reside on partitions that are sized to only 100 GB? Running commands like df would be a good way to check this at the OS level, independently of Hadoop.
--Chris Nauroth
From: MBA <ad...@hotmail.com>
Reply-To: "user@hadoop.apache.org" <us...@hadoop.apache.org>
Date: Tuesday, November 3, 2015 at 11:16 AM
To: "user@hadoop.apache.org" <us...@hadoop.apache.org>
Subject: Re: hadoop not using whole disk for HDFS
Yeah. It has the current value of 1073741824 which is like 1.07 gig.
B.
From: Chris Nauroth
Sent: Tuesday, November 03, 2015 11:57 AM
To: user@hadoop.apache.org
Subject: Re: hadoop not using whole disk for HDFS
Hi Bob,
Does the hdfs-site.xml configuration file contain the property dfs.datanode.du.reserved? If this is defined, then the DataNode intentionally will not use this space for storage of replicas.
<property>
<name>dfs.datanode.du.reserved</name>
<value>0</value>
<description>Reserved space in bytes per volume. Always leave this much space free for non dfs use.
</description>
</property>
--Chris Nauroth
From: MBA <ad...@hotmail.com>
Reply-To: "user@hadoop.apache.org" <us...@hadoop.apache.org>
Date: Tuesday, November 3, 2015 at 10:51 AM
To: "user@hadoop.apache.org" <us...@hadoop.apache.org>
Subject: hadoop not using whole disk for HDFS
I’ve got the Hortonworks distro running on a three node cluster. For some reason the disk available for HDFS is MUCH less than the total disk space. Both of my data nodes have 3TB hard drives. Only 100GB of that is being used for HDFS. Is it possible that I have a setting wrong somewhere?
B.
RE: hadoop not using whole disk for HDFS
Posted by "Naganarasimha G R (Naga)" <ga...@huawei.com>.
Hi Bob,
Seems like you have configured to disk dir to be other than an folder in /home, if so try creating another folder and add to "dfs.datanode.data.dir" seperated by comma instead of trying to reset the default.
And its also advised not to use the root partition "/" to be configured for HDFS data dir, if the Dir usage hits the maximum then OS might fail to function properly.
Regards,
+ Naga
________________________________
From: P lva [ruvikal@gmail.com]
Sent: Thursday, November 05, 2015 03:11
To: user@hadoop.apache.org
Subject: Re: hadoop not using whole disk for HDFS
What does your dfs.datanode.data.dir point to ?
On Wed, Nov 4, 2015 at 4:14 PM, Adaryl "Bob" Wakefield, MBA <ad...@hotmail.com>> wrote:
Filesystem Size Used Avail Use% Mounted on
/dev/mapper/centos-root 50G 12G 39G 23% /
devtmpfs 16G 0 16G 0% /dev
tmpfs 16G 0 16G 0% /dev/shm
tmpfs 16G 1.4G 15G 9% /run
tmpfs 16G 0 16G 0% /sys/fs/cgroup
/dev/sda2 494M 123M 372M 25% /boot
/dev/mapper/centos-home 2.7T 33M 2.7T 1% /home
That’s from one datanode. The second one is nearly identical. I discovered that 50GB is actually a default. That seems really weird. Disk space is cheap. Why would you not just use most of the disk and why is it so hard to reset the default?
Adaryl "Bob" Wakefield, MBA
Principal
Mass Street Analytics, LLC
913.938.6685<tel:913.938.6685>
www.linkedin.com/in/bobwakefieldmba<http://www.linkedin.com/in/bobwakefieldmba>
Twitter: @BobLovesData
From: Chris Nauroth<ma...@hortonworks.com>
Sent: Wednesday, November 04, 2015 12:16 PM
To: user@hadoop.apache.org<ma...@hadoop.apache.org>
Subject: Re: hadoop not using whole disk for HDFS
How are those drives partitioned? Is it possible that the directories pointed to by the dfs.datanode.data.dir property in hdfs-site.xml reside on partitions that are sized to only 100 GB? Running commands like df would be a good way to check this at the OS level, independently of Hadoop.
--Chris Nauroth
From: MBA <ad...@hotmail.com>>
Reply-To: "user@hadoop.apache.org<ma...@hadoop.apache.org>" <us...@hadoop.apache.org>>
Date: Tuesday, November 3, 2015 at 11:16 AM
To: "user@hadoop.apache.org<ma...@hadoop.apache.org>" <us...@hadoop.apache.org>>
Subject: Re: hadoop not using whole disk for HDFS
Yeah. It has the current value of 1073741824 which is like 1.07 gig.
B.
From: Chris Nauroth<ma...@hortonworks.com>
Sent: Tuesday, November 03, 2015 11:57 AM
To: user@hadoop.apache.org<ma...@hadoop.apache.org>
Subject: Re: hadoop not using whole disk for HDFS
Hi Bob,
Does the hdfs-site.xml configuration file contain the property dfs.datanode.du.reserved? If this is defined, then the DataNode intentionally will not use this space for storage of replicas.
<property>
<name>dfs.datanode.du.reserved</name>
<value>0</value>
<description>Reserved space in bytes per volume. Always leave this much space free for non dfs use.
</description>
</property>
--Chris Nauroth
From: MBA <ad...@hotmail.com>>
Reply-To: "user@hadoop.apache.org<ma...@hadoop.apache.org>" <us...@hadoop.apache.org>>
Date: Tuesday, November 3, 2015 at 10:51 AM
To: "user@hadoop.apache.org<ma...@hadoop.apache.org>" <us...@hadoop.apache.org>>
Subject: hadoop not using whole disk for HDFS
I’ve got the Hortonworks distro running on a three node cluster. For some reason the disk available for HDFS is MUCH less than the total disk space. Both of my data nodes have 3TB hard drives. Only 100GB of that is being used for HDFS. Is it possible that I have a setting wrong somewhere?
B.
Re: hadoop not using whole disk for HDFS
Posted by "Adaryl \"Bob\" Wakefield, MBA" <ad...@hotmail.com>.
/hadoop/hdfs/data
Adaryl "Bob" Wakefield, MBA
Principal
Mass Street Analytics, LLC
913.938.6685
www.linkedin.com/in/bobwakefieldmba
Twitter: @BobLovesData
From: P lva
Sent: Wednesday, November 04, 2015 3:41 PM
To: user@hadoop.apache.org
Subject: Re: hadoop not using whole disk for HDFS
What does your dfs.datanode.data.dir point to ?
On Wed, Nov 4, 2015 at 4:14 PM, Adaryl "Bob" Wakefield, MBA <ad...@hotmail.com> wrote:
Filesystem Size Used Avail Use% Mounted on
/dev/mapper/centos-root 50G 12G 39G 23% /
devtmpfs 16G 0 16G 0% /dev
tmpfs 16G 0 16G 0% /dev/shm
tmpfs 16G 1.4G 15G 9% /run
tmpfs 16G 0 16G 0% /sys/fs/cgroup
/dev/sda2 494M 123M 372M 25% /boot
/dev/mapper/centos-home 2.7T 33M 2.7T 1% /home
That’s from one datanode. The second one is nearly identical. I discovered that 50GB is actually a default. That seems really weird. Disk space is cheap. Why would you not just use most of the disk and why is it so hard to reset the default?
Adaryl "Bob" Wakefield, MBA
Principal
Mass Street Analytics, LLC
913.938.6685
www.linkedin.com/in/bobwakefieldmba
Twitter: @BobLovesData
From: Chris Nauroth
Sent: Wednesday, November 04, 2015 12:16 PM
To: user@hadoop.apache.org
Subject: Re: hadoop not using whole disk for HDFS
How are those drives partitioned? Is it possible that the directories pointed to by the dfs.datanode.data.dir property in hdfs-site.xml reside on partitions that are sized to only 100 GB? Running commands like df would be a good way to check this at the OS level, independently of Hadoop.
--Chris Nauroth
From: MBA <ad...@hotmail.com>
Reply-To: "user@hadoop.apache.org" <us...@hadoop.apache.org>
Date: Tuesday, November 3, 2015 at 11:16 AM
To: "user@hadoop.apache.org" <us...@hadoop.apache.org>
Subject: Re: hadoop not using whole disk for HDFS
Yeah. It has the current value of 1073741824 which is like 1.07 gig.
B.
From: Chris Nauroth
Sent: Tuesday, November 03, 2015 11:57 AM
To: user@hadoop.apache.org
Subject: Re: hadoop not using whole disk for HDFS
Hi Bob,
Does the hdfs-site.xml configuration file contain the property dfs.datanode.du.reserved? If this is defined, then the DataNode intentionally will not use this space for storage of replicas.
<property>
<name>dfs.datanode.du.reserved</name>
<value>0</value>
<description>Reserved space in bytes per volume. Always leave this much space free for non dfs use.
</description>
</property>
--Chris Nauroth
From: MBA <ad...@hotmail.com>
Reply-To: "user@hadoop.apache.org" <us...@hadoop.apache.org>
Date: Tuesday, November 3, 2015 at 10:51 AM
To: "user@hadoop.apache.org" <us...@hadoop.apache.org>
Subject: hadoop not using whole disk for HDFS
I’ve got the Hortonworks distro running on a three node cluster. For some reason the disk available for HDFS is MUCH less than the total disk space. Both of my data nodes have 3TB hard drives. Only 100GB of that is being used for HDFS. Is it possible that I have a setting wrong somewhere?
B.
RE: hadoop not using whole disk for HDFS
Posted by "Naganarasimha G R (Naga)" <ga...@huawei.com>.
Hi Bob,
Seems like you have configured to disk dir to be other than an folder in /home, if so try creating another folder and add to "dfs.datanode.data.dir" seperated by comma instead of trying to reset the default.
And its also advised not to use the root partition "/" to be configured for HDFS data dir, if the Dir usage hits the maximum then OS might fail to function properly.
Regards,
+ Naga
________________________________
From: P lva [ruvikal@gmail.com]
Sent: Thursday, November 05, 2015 03:11
To: user@hadoop.apache.org
Subject: Re: hadoop not using whole disk for HDFS
What does your dfs.datanode.data.dir point to ?
On Wed, Nov 4, 2015 at 4:14 PM, Adaryl "Bob" Wakefield, MBA <ad...@hotmail.com>> wrote:
Filesystem Size Used Avail Use% Mounted on
/dev/mapper/centos-root 50G 12G 39G 23% /
devtmpfs 16G 0 16G 0% /dev
tmpfs 16G 0 16G 0% /dev/shm
tmpfs 16G 1.4G 15G 9% /run
tmpfs 16G 0 16G 0% /sys/fs/cgroup
/dev/sda2 494M 123M 372M 25% /boot
/dev/mapper/centos-home 2.7T 33M 2.7T 1% /home
That’s from one datanode. The second one is nearly identical. I discovered that 50GB is actually a default. That seems really weird. Disk space is cheap. Why would you not just use most of the disk and why is it so hard to reset the default?
Adaryl "Bob" Wakefield, MBA
Principal
Mass Street Analytics, LLC
913.938.6685<tel:913.938.6685>
www.linkedin.com/in/bobwakefieldmba<http://www.linkedin.com/in/bobwakefieldmba>
Twitter: @BobLovesData
From: Chris Nauroth<ma...@hortonworks.com>
Sent: Wednesday, November 04, 2015 12:16 PM
To: user@hadoop.apache.org<ma...@hadoop.apache.org>
Subject: Re: hadoop not using whole disk for HDFS
How are those drives partitioned? Is it possible that the directories pointed to by the dfs.datanode.data.dir property in hdfs-site.xml reside on partitions that are sized to only 100 GB? Running commands like df would be a good way to check this at the OS level, independently of Hadoop.
--Chris Nauroth
From: MBA <ad...@hotmail.com>>
Reply-To: "user@hadoop.apache.org<ma...@hadoop.apache.org>" <us...@hadoop.apache.org>>
Date: Tuesday, November 3, 2015 at 11:16 AM
To: "user@hadoop.apache.org<ma...@hadoop.apache.org>" <us...@hadoop.apache.org>>
Subject: Re: hadoop not using whole disk for HDFS
Yeah. It has the current value of 1073741824 which is like 1.07 gig.
B.
From: Chris Nauroth<ma...@hortonworks.com>
Sent: Tuesday, November 03, 2015 11:57 AM
To: user@hadoop.apache.org<ma...@hadoop.apache.org>
Subject: Re: hadoop not using whole disk for HDFS
Hi Bob,
Does the hdfs-site.xml configuration file contain the property dfs.datanode.du.reserved? If this is defined, then the DataNode intentionally will not use this space for storage of replicas.
<property>
<name>dfs.datanode.du.reserved</name>
<value>0</value>
<description>Reserved space in bytes per volume. Always leave this much space free for non dfs use.
</description>
</property>
--Chris Nauroth
From: MBA <ad...@hotmail.com>>
Reply-To: "user@hadoop.apache.org<ma...@hadoop.apache.org>" <us...@hadoop.apache.org>>
Date: Tuesday, November 3, 2015 at 10:51 AM
To: "user@hadoop.apache.org<ma...@hadoop.apache.org>" <us...@hadoop.apache.org>>
Subject: hadoop not using whole disk for HDFS
I’ve got the Hortonworks distro running on a three node cluster. For some reason the disk available for HDFS is MUCH less than the total disk space. Both of my data nodes have 3TB hard drives. Only 100GB of that is being used for HDFS. Is it possible that I have a setting wrong somewhere?
B.
RE: hadoop not using whole disk for HDFS
Posted by "Naganarasimha G R (Naga)" <ga...@huawei.com>.
Hi Bob,
Seems like you have configured to disk dir to be other than an folder in /home, if so try creating another folder and add to "dfs.datanode.data.dir" seperated by comma instead of trying to reset the default.
And its also advised not to use the root partition "/" to be configured for HDFS data dir, if the Dir usage hits the maximum then OS might fail to function properly.
Regards,
+ Naga
________________________________
From: P lva [ruvikal@gmail.com]
Sent: Thursday, November 05, 2015 03:11
To: user@hadoop.apache.org
Subject: Re: hadoop not using whole disk for HDFS
What does your dfs.datanode.data.dir point to ?
On Wed, Nov 4, 2015 at 4:14 PM, Adaryl "Bob" Wakefield, MBA <ad...@hotmail.com>> wrote:
Filesystem Size Used Avail Use% Mounted on
/dev/mapper/centos-root 50G 12G 39G 23% /
devtmpfs 16G 0 16G 0% /dev
tmpfs 16G 0 16G 0% /dev/shm
tmpfs 16G 1.4G 15G 9% /run
tmpfs 16G 0 16G 0% /sys/fs/cgroup
/dev/sda2 494M 123M 372M 25% /boot
/dev/mapper/centos-home 2.7T 33M 2.7T 1% /home
That’s from one datanode. The second one is nearly identical. I discovered that 50GB is actually a default. That seems really weird. Disk space is cheap. Why would you not just use most of the disk and why is it so hard to reset the default?
Adaryl "Bob" Wakefield, MBA
Principal
Mass Street Analytics, LLC
913.938.6685<tel:913.938.6685>
www.linkedin.com/in/bobwakefieldmba<http://www.linkedin.com/in/bobwakefieldmba>
Twitter: @BobLovesData
From: Chris Nauroth<ma...@hortonworks.com>
Sent: Wednesday, November 04, 2015 12:16 PM
To: user@hadoop.apache.org<ma...@hadoop.apache.org>
Subject: Re: hadoop not using whole disk for HDFS
How are those drives partitioned? Is it possible that the directories pointed to by the dfs.datanode.data.dir property in hdfs-site.xml reside on partitions that are sized to only 100 GB? Running commands like df would be a good way to check this at the OS level, independently of Hadoop.
--Chris Nauroth
From: MBA <ad...@hotmail.com>>
Reply-To: "user@hadoop.apache.org<ma...@hadoop.apache.org>" <us...@hadoop.apache.org>>
Date: Tuesday, November 3, 2015 at 11:16 AM
To: "user@hadoop.apache.org<ma...@hadoop.apache.org>" <us...@hadoop.apache.org>>
Subject: Re: hadoop not using whole disk for HDFS
Yeah. It has the current value of 1073741824 which is like 1.07 gig.
B.
From: Chris Nauroth<ma...@hortonworks.com>
Sent: Tuesday, November 03, 2015 11:57 AM
To: user@hadoop.apache.org<ma...@hadoop.apache.org>
Subject: Re: hadoop not using whole disk for HDFS
Hi Bob,
Does the hdfs-site.xml configuration file contain the property dfs.datanode.du.reserved? If this is defined, then the DataNode intentionally will not use this space for storage of replicas.
<property>
<name>dfs.datanode.du.reserved</name>
<value>0</value>
<description>Reserved space in bytes per volume. Always leave this much space free for non dfs use.
</description>
</property>
--Chris Nauroth
From: MBA <ad...@hotmail.com>>
Reply-To: "user@hadoop.apache.org<ma...@hadoop.apache.org>" <us...@hadoop.apache.org>>
Date: Tuesday, November 3, 2015 at 10:51 AM
To: "user@hadoop.apache.org<ma...@hadoop.apache.org>" <us...@hadoop.apache.org>>
Subject: hadoop not using whole disk for HDFS
I’ve got the Hortonworks distro running on a three node cluster. For some reason the disk available for HDFS is MUCH less than the total disk space. Both of my data nodes have 3TB hard drives. Only 100GB of that is being used for HDFS. Is it possible that I have a setting wrong somewhere?
B.
Re: hadoop not using whole disk for HDFS
Posted by P lva <ru...@gmail.com>.
What does your dfs.datanode.data.dir point to ?
On Wed, Nov 4, 2015 at 4:14 PM, Adaryl "Bob" Wakefield, MBA <
adaryl.wakefield@hotmail.com> wrote:
> Filesystem Size Used Avail Use% Mounted on /dev/mapper/centos-root 50G 12G
> 39G 23% / devtmpfs 16G 0 16G 0% /dev tmpfs 16G 0 16G 0% /dev/shm tmpfs 16G
> 1.4G 15G 9% /run tmpfs 16G 0 16G 0% /sys/fs/cgroup /dev/sda2 494M 123M
> 372M 25% /boot /dev/mapper/centos-home 2.7T 33M 2.7T 1% /home
>
> That’s from one datanode. The second one is nearly identical. I discovered
> that 50GB is actually a default. That seems really weird. Disk space is
> cheap. Why would you not just use most of the disk and why is it so hard to
> reset the default?
>
> Adaryl "Bob" Wakefield, MBA
> Principal
> Mass Street Analytics, LLC
> 913.938.6685
> www.linkedin.com/in/bobwakefieldmba
> Twitter: @BobLovesData
>
> *From:* Chris Nauroth <cn...@hortonworks.com>
> *Sent:* Wednesday, November 04, 2015 12:16 PM
> *To:* user@hadoop.apache.org
> *Subject:* Re: hadoop not using whole disk for HDFS
>
> How are those drives partitioned? Is it possible that the directories
> pointed to by the dfs.datanode.data.dir property in hdfs-site.xml reside on
> partitions that are sized to only 100 GB? Running commands like df would
> be a good way to check this at the OS level, independently of Hadoop.
>
> --Chris Nauroth
>
> From: MBA <ad...@hotmail.com>
> Reply-To: "user@hadoop.apache.org" <us...@hadoop.apache.org>
> Date: Tuesday, November 3, 2015 at 11:16 AM
> To: "user@hadoop.apache.org" <us...@hadoop.apache.org>
> Subject: Re: hadoop not using whole disk for HDFS
>
> Yeah. It has the current value of 1073741824 which is like 1.07 gig.
>
> B.
> *From:* Chris Nauroth <cn...@hortonworks.com>
> *Sent:* Tuesday, November 03, 2015 11:57 AM
> *To:* user@hadoop.apache.org
> *Subject:* Re: hadoop not using whole disk for HDFS
>
> Hi Bob,
>
> Does the hdfs-site.xml configuration file contain the property
> dfs.datanode.du.reserved? If this is defined, then the DataNode
> intentionally will not use this space for storage of replicas.
>
> <property>
> <name>dfs.datanode.du.reserved</name>
> <value>0</value>
> <description>Reserved space in bytes per volume. Always leave this much
> space free for non dfs use.
> </description>
> </property>
>
> --Chris Nauroth
>
> From: MBA <ad...@hotmail.com>
> Reply-To: "user@hadoop.apache.org" <us...@hadoop.apache.org>
> Date: Tuesday, November 3, 2015 at 10:51 AM
> To: "user@hadoop.apache.org" <us...@hadoop.apache.org>
> Subject: hadoop not using whole disk for HDFS
>
> I’ve got the Hortonworks distro running on a three node cluster. For some
> reason the disk available for HDFS is MUCH less than the total disk space.
> Both of my data nodes have 3TB hard drives. Only 100GB of that is being
> used for HDFS. Is it possible that I have a setting wrong somewhere?
>
> B.
>
Re: hadoop not using whole disk for HDFS
Posted by P lva <ru...@gmail.com>.
What does your dfs.datanode.data.dir point to ?
On Wed, Nov 4, 2015 at 4:14 PM, Adaryl "Bob" Wakefield, MBA <
adaryl.wakefield@hotmail.com> wrote:
> Filesystem Size Used Avail Use% Mounted on /dev/mapper/centos-root 50G 12G
> 39G 23% / devtmpfs 16G 0 16G 0% /dev tmpfs 16G 0 16G 0% /dev/shm tmpfs 16G
> 1.4G 15G 9% /run tmpfs 16G 0 16G 0% /sys/fs/cgroup /dev/sda2 494M 123M
> 372M 25% /boot /dev/mapper/centos-home 2.7T 33M 2.7T 1% /home
>
> That’s from one datanode. The second one is nearly identical. I discovered
> that 50GB is actually a default. That seems really weird. Disk space is
> cheap. Why would you not just use most of the disk and why is it so hard to
> reset the default?
>
> Adaryl "Bob" Wakefield, MBA
> Principal
> Mass Street Analytics, LLC
> 913.938.6685
> www.linkedin.com/in/bobwakefieldmba
> Twitter: @BobLovesData
>
> *From:* Chris Nauroth <cn...@hortonworks.com>
> *Sent:* Wednesday, November 04, 2015 12:16 PM
> *To:* user@hadoop.apache.org
> *Subject:* Re: hadoop not using whole disk for HDFS
>
> How are those drives partitioned? Is it possible that the directories
> pointed to by the dfs.datanode.data.dir property in hdfs-site.xml reside on
> partitions that are sized to only 100 GB? Running commands like df would
> be a good way to check this at the OS level, independently of Hadoop.
>
> --Chris Nauroth
>
> From: MBA <ad...@hotmail.com>
> Reply-To: "user@hadoop.apache.org" <us...@hadoop.apache.org>
> Date: Tuesday, November 3, 2015 at 11:16 AM
> To: "user@hadoop.apache.org" <us...@hadoop.apache.org>
> Subject: Re: hadoop not using whole disk for HDFS
>
> Yeah. It has the current value of 1073741824 which is like 1.07 gig.
>
> B.
> *From:* Chris Nauroth <cn...@hortonworks.com>
> *Sent:* Tuesday, November 03, 2015 11:57 AM
> *To:* user@hadoop.apache.org
> *Subject:* Re: hadoop not using whole disk for HDFS
>
> Hi Bob,
>
> Does the hdfs-site.xml configuration file contain the property
> dfs.datanode.du.reserved? If this is defined, then the DataNode
> intentionally will not use this space for storage of replicas.
>
> <property>
> <name>dfs.datanode.du.reserved</name>
> <value>0</value>
> <description>Reserved space in bytes per volume. Always leave this much
> space free for non dfs use.
> </description>
> </property>
>
> --Chris Nauroth
>
> From: MBA <ad...@hotmail.com>
> Reply-To: "user@hadoop.apache.org" <us...@hadoop.apache.org>
> Date: Tuesday, November 3, 2015 at 10:51 AM
> To: "user@hadoop.apache.org" <us...@hadoop.apache.org>
> Subject: hadoop not using whole disk for HDFS
>
> I’ve got the Hortonworks distro running on a three node cluster. For some
> reason the disk available for HDFS is MUCH less than the total disk space.
> Both of my data nodes have 3TB hard drives. Only 100GB of that is being
> used for HDFS. Is it possible that I have a setting wrong somewhere?
>
> B.
>
Re: hadoop not using whole disk for HDFS
Posted by P lva <ru...@gmail.com>.
What does your dfs.datanode.data.dir point to ?
On Wed, Nov 4, 2015 at 4:14 PM, Adaryl "Bob" Wakefield, MBA <
adaryl.wakefield@hotmail.com> wrote:
> Filesystem Size Used Avail Use% Mounted on /dev/mapper/centos-root 50G 12G
> 39G 23% / devtmpfs 16G 0 16G 0% /dev tmpfs 16G 0 16G 0% /dev/shm tmpfs 16G
> 1.4G 15G 9% /run tmpfs 16G 0 16G 0% /sys/fs/cgroup /dev/sda2 494M 123M
> 372M 25% /boot /dev/mapper/centos-home 2.7T 33M 2.7T 1% /home
>
> That’s from one datanode. The second one is nearly identical. I discovered
> that 50GB is actually a default. That seems really weird. Disk space is
> cheap. Why would you not just use most of the disk and why is it so hard to
> reset the default?
>
> Adaryl "Bob" Wakefield, MBA
> Principal
> Mass Street Analytics, LLC
> 913.938.6685
> www.linkedin.com/in/bobwakefieldmba
> Twitter: @BobLovesData
>
> *From:* Chris Nauroth <cn...@hortonworks.com>
> *Sent:* Wednesday, November 04, 2015 12:16 PM
> *To:* user@hadoop.apache.org
> *Subject:* Re: hadoop not using whole disk for HDFS
>
> How are those drives partitioned? Is it possible that the directories
> pointed to by the dfs.datanode.data.dir property in hdfs-site.xml reside on
> partitions that are sized to only 100 GB? Running commands like df would
> be a good way to check this at the OS level, independently of Hadoop.
>
> --Chris Nauroth
>
> From: MBA <ad...@hotmail.com>
> Reply-To: "user@hadoop.apache.org" <us...@hadoop.apache.org>
> Date: Tuesday, November 3, 2015 at 11:16 AM
> To: "user@hadoop.apache.org" <us...@hadoop.apache.org>
> Subject: Re: hadoop not using whole disk for HDFS
>
> Yeah. It has the current value of 1073741824 which is like 1.07 gig.
>
> B.
> *From:* Chris Nauroth <cn...@hortonworks.com>
> *Sent:* Tuesday, November 03, 2015 11:57 AM
> *To:* user@hadoop.apache.org
> *Subject:* Re: hadoop not using whole disk for HDFS
>
> Hi Bob,
>
> Does the hdfs-site.xml configuration file contain the property
> dfs.datanode.du.reserved? If this is defined, then the DataNode
> intentionally will not use this space for storage of replicas.
>
> <property>
> <name>dfs.datanode.du.reserved</name>
> <value>0</value>
> <description>Reserved space in bytes per volume. Always leave this much
> space free for non dfs use.
> </description>
> </property>
>
> --Chris Nauroth
>
> From: MBA <ad...@hotmail.com>
> Reply-To: "user@hadoop.apache.org" <us...@hadoop.apache.org>
> Date: Tuesday, November 3, 2015 at 10:51 AM
> To: "user@hadoop.apache.org" <us...@hadoop.apache.org>
> Subject: hadoop not using whole disk for HDFS
>
> I’ve got the Hortonworks distro running on a three node cluster. For some
> reason the disk available for HDFS is MUCH less than the total disk space.
> Both of my data nodes have 3TB hard drives. Only 100GB of that is being
> used for HDFS. Is it possible that I have a setting wrong somewhere?
>
> B.
>
Re: hadoop not using whole disk for HDFS
Posted by P lva <ru...@gmail.com>.
What does your dfs.datanode.data.dir point to ?
On Wed, Nov 4, 2015 at 4:14 PM, Adaryl "Bob" Wakefield, MBA <
adaryl.wakefield@hotmail.com> wrote:
> Filesystem Size Used Avail Use% Mounted on /dev/mapper/centos-root 50G 12G
> 39G 23% / devtmpfs 16G 0 16G 0% /dev tmpfs 16G 0 16G 0% /dev/shm tmpfs 16G
> 1.4G 15G 9% /run tmpfs 16G 0 16G 0% /sys/fs/cgroup /dev/sda2 494M 123M
> 372M 25% /boot /dev/mapper/centos-home 2.7T 33M 2.7T 1% /home
>
> That’s from one datanode. The second one is nearly identical. I discovered
> that 50GB is actually a default. That seems really weird. Disk space is
> cheap. Why would you not just use most of the disk and why is it so hard to
> reset the default?
>
> Adaryl "Bob" Wakefield, MBA
> Principal
> Mass Street Analytics, LLC
> 913.938.6685
> www.linkedin.com/in/bobwakefieldmba
> Twitter: @BobLovesData
>
> *From:* Chris Nauroth <cn...@hortonworks.com>
> *Sent:* Wednesday, November 04, 2015 12:16 PM
> *To:* user@hadoop.apache.org
> *Subject:* Re: hadoop not using whole disk for HDFS
>
> How are those drives partitioned? Is it possible that the directories
> pointed to by the dfs.datanode.data.dir property in hdfs-site.xml reside on
> partitions that are sized to only 100 GB? Running commands like df would
> be a good way to check this at the OS level, independently of Hadoop.
>
> --Chris Nauroth
>
> From: MBA <ad...@hotmail.com>
> Reply-To: "user@hadoop.apache.org" <us...@hadoop.apache.org>
> Date: Tuesday, November 3, 2015 at 11:16 AM
> To: "user@hadoop.apache.org" <us...@hadoop.apache.org>
> Subject: Re: hadoop not using whole disk for HDFS
>
> Yeah. It has the current value of 1073741824 which is like 1.07 gig.
>
> B.
> *From:* Chris Nauroth <cn...@hortonworks.com>
> *Sent:* Tuesday, November 03, 2015 11:57 AM
> *To:* user@hadoop.apache.org
> *Subject:* Re: hadoop not using whole disk for HDFS
>
> Hi Bob,
>
> Does the hdfs-site.xml configuration file contain the property
> dfs.datanode.du.reserved? If this is defined, then the DataNode
> intentionally will not use this space for storage of replicas.
>
> <property>
> <name>dfs.datanode.du.reserved</name>
> <value>0</value>
> <description>Reserved space in bytes per volume. Always leave this much
> space free for non dfs use.
> </description>
> </property>
>
> --Chris Nauroth
>
> From: MBA <ad...@hotmail.com>
> Reply-To: "user@hadoop.apache.org" <us...@hadoop.apache.org>
> Date: Tuesday, November 3, 2015 at 10:51 AM
> To: "user@hadoop.apache.org" <us...@hadoop.apache.org>
> Subject: hadoop not using whole disk for HDFS
>
> I’ve got the Hortonworks distro running on a three node cluster. For some
> reason the disk available for HDFS is MUCH less than the total disk space.
> Both of my data nodes have 3TB hard drives. Only 100GB of that is being
> used for HDFS. Is it possible that I have a setting wrong somewhere?
>
> B.
>
Re: hadoop not using whole disk for HDFS
Posted by "Adaryl \"Bob\" Wakefield, MBA" <ad...@hotmail.com>.
Filesystem Size Used Avail Use% Mounted on
/dev/mapper/centos-root 50G 12G 39G 23% /
devtmpfs 16G 0 16G 0% /dev
tmpfs 16G 0 16G 0% /dev/shm
tmpfs 16G 1.4G 15G 9% /run
tmpfs 16G 0 16G 0% /sys/fs/cgroup
/dev/sda2 494M 123M 372M 25% /boot
/dev/mapper/centos-home 2.7T 33M 2.7T 1% /home
That’s from one datanode. The second one is nearly identical. I discovered that 50GB is actually a default. That seems really weird. Disk space is cheap. Why would you not just use most of the disk and why is it so hard to reset the default?
Adaryl "Bob" Wakefield, MBA
Principal
Mass Street Analytics, LLC
913.938.6685
www.linkedin.com/in/bobwakefieldmba
Twitter: @BobLovesData
From: Chris Nauroth
Sent: Wednesday, November 04, 2015 12:16 PM
To: user@hadoop.apache.org
Subject: Re: hadoop not using whole disk for HDFS
How are those drives partitioned? Is it possible that the directories pointed to by the dfs.datanode.data.dir property in hdfs-site.xml reside on partitions that are sized to only 100 GB? Running commands like df would be a good way to check this at the OS level, independently of Hadoop.
--Chris Nauroth
From: MBA <ad...@hotmail.com>
Reply-To: "user@hadoop.apache.org" <us...@hadoop.apache.org>
Date: Tuesday, November 3, 2015 at 11:16 AM
To: "user@hadoop.apache.org" <us...@hadoop.apache.org>
Subject: Re: hadoop not using whole disk for HDFS
Yeah. It has the current value of 1073741824 which is like 1.07 gig.
B.
From: Chris Nauroth
Sent: Tuesday, November 03, 2015 11:57 AM
To: user@hadoop.apache.org
Subject: Re: hadoop not using whole disk for HDFS
Hi Bob,
Does the hdfs-site.xml configuration file contain the property dfs.datanode.du.reserved? If this is defined, then the DataNode intentionally will not use this space for storage of replicas.
<property>
<name>dfs.datanode.du.reserved</name>
<value>0</value>
<description>Reserved space in bytes per volume. Always leave this much space free for non dfs use.
</description>
</property>
--Chris Nauroth
From: MBA <ad...@hotmail.com>
Reply-To: "user@hadoop.apache.org" <us...@hadoop.apache.org>
Date: Tuesday, November 3, 2015 at 10:51 AM
To: "user@hadoop.apache.org" <us...@hadoop.apache.org>
Subject: hadoop not using whole disk for HDFS
I’ve got the Hortonworks distro running on a three node cluster. For some reason the disk available for HDFS is MUCH less than the total disk space. Both of my data nodes have 3TB hard drives. Only 100GB of that is being used for HDFS. Is it possible that I have a setting wrong somewhere?
B.
Re: hadoop not using whole disk for HDFS
Posted by "Adaryl \"Bob\" Wakefield, MBA" <ad...@hotmail.com>.
Filesystem Size Used Avail Use% Mounted on
/dev/mapper/centos-root 50G 12G 39G 23% /
devtmpfs 16G 0 16G 0% /dev
tmpfs 16G 0 16G 0% /dev/shm
tmpfs 16G 1.4G 15G 9% /run
tmpfs 16G 0 16G 0% /sys/fs/cgroup
/dev/sda2 494M 123M 372M 25% /boot
/dev/mapper/centos-home 2.7T 33M 2.7T 1% /home
That’s from one datanode. The second one is nearly identical. I discovered that 50GB is actually a default. That seems really weird. Disk space is cheap. Why would you not just use most of the disk and why is it so hard to reset the default?
Adaryl "Bob" Wakefield, MBA
Principal
Mass Street Analytics, LLC
913.938.6685
www.linkedin.com/in/bobwakefieldmba
Twitter: @BobLovesData
From: Chris Nauroth
Sent: Wednesday, November 04, 2015 12:16 PM
To: user@hadoop.apache.org
Subject: Re: hadoop not using whole disk for HDFS
How are those drives partitioned? Is it possible that the directories pointed to by the dfs.datanode.data.dir property in hdfs-site.xml reside on partitions that are sized to only 100 GB? Running commands like df would be a good way to check this at the OS level, independently of Hadoop.
--Chris Nauroth
From: MBA <ad...@hotmail.com>
Reply-To: "user@hadoop.apache.org" <us...@hadoop.apache.org>
Date: Tuesday, November 3, 2015 at 11:16 AM
To: "user@hadoop.apache.org" <us...@hadoop.apache.org>
Subject: Re: hadoop not using whole disk for HDFS
Yeah. It has the current value of 1073741824 which is like 1.07 gig.
B.
From: Chris Nauroth
Sent: Tuesday, November 03, 2015 11:57 AM
To: user@hadoop.apache.org
Subject: Re: hadoop not using whole disk for HDFS
Hi Bob,
Does the hdfs-site.xml configuration file contain the property dfs.datanode.du.reserved? If this is defined, then the DataNode intentionally will not use this space for storage of replicas.
<property>
<name>dfs.datanode.du.reserved</name>
<value>0</value>
<description>Reserved space in bytes per volume. Always leave this much space free for non dfs use.
</description>
</property>
--Chris Nauroth
From: MBA <ad...@hotmail.com>
Reply-To: "user@hadoop.apache.org" <us...@hadoop.apache.org>
Date: Tuesday, November 3, 2015 at 10:51 AM
To: "user@hadoop.apache.org" <us...@hadoop.apache.org>
Subject: hadoop not using whole disk for HDFS
I’ve got the Hortonworks distro running on a three node cluster. For some reason the disk available for HDFS is MUCH less than the total disk space. Both of my data nodes have 3TB hard drives. Only 100GB of that is being used for HDFS. Is it possible that I have a setting wrong somewhere?
B.
Re: hadoop not using whole disk for HDFS
Posted by "Adaryl \"Bob\" Wakefield, MBA" <ad...@hotmail.com>.
Filesystem Size Used Avail Use% Mounted on
/dev/mapper/centos-root 50G 12G 39G 23% /
devtmpfs 16G 0 16G 0% /dev
tmpfs 16G 0 16G 0% /dev/shm
tmpfs 16G 1.4G 15G 9% /run
tmpfs 16G 0 16G 0% /sys/fs/cgroup
/dev/sda2 494M 123M 372M 25% /boot
/dev/mapper/centos-home 2.7T 33M 2.7T 1% /home
That’s from one datanode. The second one is nearly identical. I discovered that 50GB is actually a default. That seems really weird. Disk space is cheap. Why would you not just use most of the disk and why is it so hard to reset the default?
Adaryl "Bob" Wakefield, MBA
Principal
Mass Street Analytics, LLC
913.938.6685
www.linkedin.com/in/bobwakefieldmba
Twitter: @BobLovesData
From: Chris Nauroth
Sent: Wednesday, November 04, 2015 12:16 PM
To: user@hadoop.apache.org
Subject: Re: hadoop not using whole disk for HDFS
How are those drives partitioned? Is it possible that the directories pointed to by the dfs.datanode.data.dir property in hdfs-site.xml reside on partitions that are sized to only 100 GB? Running commands like df would be a good way to check this at the OS level, independently of Hadoop.
--Chris Nauroth
From: MBA <ad...@hotmail.com>
Reply-To: "user@hadoop.apache.org" <us...@hadoop.apache.org>
Date: Tuesday, November 3, 2015 at 11:16 AM
To: "user@hadoop.apache.org" <us...@hadoop.apache.org>
Subject: Re: hadoop not using whole disk for HDFS
Yeah. It has the current value of 1073741824 which is like 1.07 gig.
B.
From: Chris Nauroth
Sent: Tuesday, November 03, 2015 11:57 AM
To: user@hadoop.apache.org
Subject: Re: hadoop not using whole disk for HDFS
Hi Bob,
Does the hdfs-site.xml configuration file contain the property dfs.datanode.du.reserved? If this is defined, then the DataNode intentionally will not use this space for storage of replicas.
<property>
<name>dfs.datanode.du.reserved</name>
<value>0</value>
<description>Reserved space in bytes per volume. Always leave this much space free for non dfs use.
</description>
</property>
--Chris Nauroth
From: MBA <ad...@hotmail.com>
Reply-To: "user@hadoop.apache.org" <us...@hadoop.apache.org>
Date: Tuesday, November 3, 2015 at 10:51 AM
To: "user@hadoop.apache.org" <us...@hadoop.apache.org>
Subject: hadoop not using whole disk for HDFS
I’ve got the Hortonworks distro running on a three node cluster. For some reason the disk available for HDFS is MUCH less than the total disk space. Both of my data nodes have 3TB hard drives. Only 100GB of that is being used for HDFS. Is it possible that I have a setting wrong somewhere?
B.
Re: hadoop not using whole disk for HDFS
Posted by "Adaryl \"Bob\" Wakefield, MBA" <ad...@hotmail.com>.
Filesystem Size Used Avail Use% Mounted on
/dev/mapper/centos-root 50G 12G 39G 23% /
devtmpfs 16G 0 16G 0% /dev
tmpfs 16G 0 16G 0% /dev/shm
tmpfs 16G 1.4G 15G 9% /run
tmpfs 16G 0 16G 0% /sys/fs/cgroup
/dev/sda2 494M 123M 372M 25% /boot
/dev/mapper/centos-home 2.7T 33M 2.7T 1% /home
That’s from one datanode. The second one is nearly identical. I discovered that 50GB is actually a default. That seems really weird. Disk space is cheap. Why would you not just use most of the disk and why is it so hard to reset the default?
Adaryl "Bob" Wakefield, MBA
Principal
Mass Street Analytics, LLC
913.938.6685
www.linkedin.com/in/bobwakefieldmba
Twitter: @BobLovesData
From: Chris Nauroth
Sent: Wednesday, November 04, 2015 12:16 PM
To: user@hadoop.apache.org
Subject: Re: hadoop not using whole disk for HDFS
How are those drives partitioned? Is it possible that the directories pointed to by the dfs.datanode.data.dir property in hdfs-site.xml reside on partitions that are sized to only 100 GB? Running commands like df would be a good way to check this at the OS level, independently of Hadoop.
--Chris Nauroth
From: MBA <ad...@hotmail.com>
Reply-To: "user@hadoop.apache.org" <us...@hadoop.apache.org>
Date: Tuesday, November 3, 2015 at 11:16 AM
To: "user@hadoop.apache.org" <us...@hadoop.apache.org>
Subject: Re: hadoop not using whole disk for HDFS
Yeah. It has the current value of 1073741824 which is like 1.07 gig.
B.
From: Chris Nauroth
Sent: Tuesday, November 03, 2015 11:57 AM
To: user@hadoop.apache.org
Subject: Re: hadoop not using whole disk for HDFS
Hi Bob,
Does the hdfs-site.xml configuration file contain the property dfs.datanode.du.reserved? If this is defined, then the DataNode intentionally will not use this space for storage of replicas.
<property>
<name>dfs.datanode.du.reserved</name>
<value>0</value>
<description>Reserved space in bytes per volume. Always leave this much space free for non dfs use.
</description>
</property>
--Chris Nauroth
From: MBA <ad...@hotmail.com>
Reply-To: "user@hadoop.apache.org" <us...@hadoop.apache.org>
Date: Tuesday, November 3, 2015 at 10:51 AM
To: "user@hadoop.apache.org" <us...@hadoop.apache.org>
Subject: hadoop not using whole disk for HDFS
I’ve got the Hortonworks distro running on a three node cluster. For some reason the disk available for HDFS is MUCH less than the total disk space. Both of my data nodes have 3TB hard drives. Only 100GB of that is being used for HDFS. Is it possible that I have a setting wrong somewhere?
B.
Re: hadoop not using whole disk for HDFS
Posted by Chris Nauroth <cn...@hortonworks.com>.
How are those drives partitioned? Is it possible that the directories pointed to by the dfs.datanode.data.dir property in hdfs-site.xml reside on partitions that are sized to only 100 GB? Running commands like df would be a good way to check this at the OS level, independently of Hadoop.
--Chris Nauroth
From: MBA <ad...@hotmail.com>>
Reply-To: "user@hadoop.apache.org<ma...@hadoop.apache.org>" <us...@hadoop.apache.org>>
Date: Tuesday, November 3, 2015 at 11:16 AM
To: "user@hadoop.apache.org<ma...@hadoop.apache.org>" <us...@hadoop.apache.org>>
Subject: Re: hadoop not using whole disk for HDFS
Yeah. It has the current value of 1073741824 which is like 1.07 gig.
B.
From: Chris Nauroth<ma...@hortonworks.com>
Sent: Tuesday, November 03, 2015 11:57 AM
To: user@hadoop.apache.org<ma...@hadoop.apache.org>
Subject: Re: hadoop not using whole disk for HDFS
Hi Bob,
Does the hdfs-site.xml configuration file contain the property dfs.datanode.du.reserved? If this is defined, then the DataNode intentionally will not use this space for storage of replicas.
<property>
<name>dfs.datanode.du.reserved</name>
<value>0</value>
<description>Reserved space in bytes per volume. Always leave this much space free for non dfs use.
</description>
</property>
--Chris Nauroth
From: MBA <ad...@hotmail.com>>
Reply-To: "user@hadoop.apache.org<ma...@hadoop.apache.org>" <us...@hadoop.apache.org>>
Date: Tuesday, November 3, 2015 at 10:51 AM
To: "user@hadoop.apache.org<ma...@hadoop.apache.org>" <us...@hadoop.apache.org>>
Subject: hadoop not using whole disk for HDFS
I've got the Hortonworks distro running on a three node cluster. For some reason the disk available for HDFS is MUCH less than the total disk space. Both of my data nodes have 3TB hard drives. Only 100GB of that is being used for HDFS. Is it possible that I have a setting wrong somewhere?
B.
Re: hadoop not using whole disk for HDFS
Posted by Chris Nauroth <cn...@hortonworks.com>.
How are those drives partitioned? Is it possible that the directories pointed to by the dfs.datanode.data.dir property in hdfs-site.xml reside on partitions that are sized to only 100 GB? Running commands like df would be a good way to check this at the OS level, independently of Hadoop.
--Chris Nauroth
From: MBA <ad...@hotmail.com>>
Reply-To: "user@hadoop.apache.org<ma...@hadoop.apache.org>" <us...@hadoop.apache.org>>
Date: Tuesday, November 3, 2015 at 11:16 AM
To: "user@hadoop.apache.org<ma...@hadoop.apache.org>" <us...@hadoop.apache.org>>
Subject: Re: hadoop not using whole disk for HDFS
Yeah. It has the current value of 1073741824 which is like 1.07 gig.
B.
From: Chris Nauroth<ma...@hortonworks.com>
Sent: Tuesday, November 03, 2015 11:57 AM
To: user@hadoop.apache.org<ma...@hadoop.apache.org>
Subject: Re: hadoop not using whole disk for HDFS
Hi Bob,
Does the hdfs-site.xml configuration file contain the property dfs.datanode.du.reserved? If this is defined, then the DataNode intentionally will not use this space for storage of replicas.
<property>
<name>dfs.datanode.du.reserved</name>
<value>0</value>
<description>Reserved space in bytes per volume. Always leave this much space free for non dfs use.
</description>
</property>
--Chris Nauroth
From: MBA <ad...@hotmail.com>>
Reply-To: "user@hadoop.apache.org<ma...@hadoop.apache.org>" <us...@hadoop.apache.org>>
Date: Tuesday, November 3, 2015 at 10:51 AM
To: "user@hadoop.apache.org<ma...@hadoop.apache.org>" <us...@hadoop.apache.org>>
Subject: hadoop not using whole disk for HDFS
I've got the Hortonworks distro running on a three node cluster. For some reason the disk available for HDFS is MUCH less than the total disk space. Both of my data nodes have 3TB hard drives. Only 100GB of that is being used for HDFS. Is it possible that I have a setting wrong somewhere?
B.
Re: hadoop not using whole disk for HDFS
Posted by Chris Nauroth <cn...@hortonworks.com>.
How are those drives partitioned? Is it possible that the directories pointed to by the dfs.datanode.data.dir property in hdfs-site.xml reside on partitions that are sized to only 100 GB? Running commands like df would be a good way to check this at the OS level, independently of Hadoop.
--Chris Nauroth
From: MBA <ad...@hotmail.com>>
Reply-To: "user@hadoop.apache.org<ma...@hadoop.apache.org>" <us...@hadoop.apache.org>>
Date: Tuesday, November 3, 2015 at 11:16 AM
To: "user@hadoop.apache.org<ma...@hadoop.apache.org>" <us...@hadoop.apache.org>>
Subject: Re: hadoop not using whole disk for HDFS
Yeah. It has the current value of 1073741824 which is like 1.07 gig.
B.
From: Chris Nauroth<ma...@hortonworks.com>
Sent: Tuesday, November 03, 2015 11:57 AM
To: user@hadoop.apache.org<ma...@hadoop.apache.org>
Subject: Re: hadoop not using whole disk for HDFS
Hi Bob,
Does the hdfs-site.xml configuration file contain the property dfs.datanode.du.reserved? If this is defined, then the DataNode intentionally will not use this space for storage of replicas.
<property>
<name>dfs.datanode.du.reserved</name>
<value>0</value>
<description>Reserved space in bytes per volume. Always leave this much space free for non dfs use.
</description>
</property>
--Chris Nauroth
From: MBA <ad...@hotmail.com>>
Reply-To: "user@hadoop.apache.org<ma...@hadoop.apache.org>" <us...@hadoop.apache.org>>
Date: Tuesday, November 3, 2015 at 10:51 AM
To: "user@hadoop.apache.org<ma...@hadoop.apache.org>" <us...@hadoop.apache.org>>
Subject: hadoop not using whole disk for HDFS
I've got the Hortonworks distro running on a three node cluster. For some reason the disk available for HDFS is MUCH less than the total disk space. Both of my data nodes have 3TB hard drives. Only 100GB of that is being used for HDFS. Is it possible that I have a setting wrong somewhere?
B.
Re: hadoop not using whole disk for HDFS
Posted by Chris Nauroth <cn...@hortonworks.com>.
How are those drives partitioned? Is it possible that the directories pointed to by the dfs.datanode.data.dir property in hdfs-site.xml reside on partitions that are sized to only 100 GB? Running commands like df would be a good way to check this at the OS level, independently of Hadoop.
--Chris Nauroth
From: MBA <ad...@hotmail.com>>
Reply-To: "user@hadoop.apache.org<ma...@hadoop.apache.org>" <us...@hadoop.apache.org>>
Date: Tuesday, November 3, 2015 at 11:16 AM
To: "user@hadoop.apache.org<ma...@hadoop.apache.org>" <us...@hadoop.apache.org>>
Subject: Re: hadoop not using whole disk for HDFS
Yeah. It has the current value of 1073741824 which is like 1.07 gig.
B.
From: Chris Nauroth<ma...@hortonworks.com>
Sent: Tuesday, November 03, 2015 11:57 AM
To: user@hadoop.apache.org<ma...@hadoop.apache.org>
Subject: Re: hadoop not using whole disk for HDFS
Hi Bob,
Does the hdfs-site.xml configuration file contain the property dfs.datanode.du.reserved? If this is defined, then the DataNode intentionally will not use this space for storage of replicas.
<property>
<name>dfs.datanode.du.reserved</name>
<value>0</value>
<description>Reserved space in bytes per volume. Always leave this much space free for non dfs use.
</description>
</property>
--Chris Nauroth
From: MBA <ad...@hotmail.com>>
Reply-To: "user@hadoop.apache.org<ma...@hadoop.apache.org>" <us...@hadoop.apache.org>>
Date: Tuesday, November 3, 2015 at 10:51 AM
To: "user@hadoop.apache.org<ma...@hadoop.apache.org>" <us...@hadoop.apache.org>>
Subject: hadoop not using whole disk for HDFS
I've got the Hortonworks distro running on a three node cluster. For some reason the disk available for HDFS is MUCH less than the total disk space. Both of my data nodes have 3TB hard drives. Only 100GB of that is being used for HDFS. Is it possible that I have a setting wrong somewhere?
B.
Re: hadoop not using whole disk for HDFS
Posted by "Adaryl \"Bob\" Wakefield, MBA" <ad...@hotmail.com>.
Yeah. It has the current value of 1073741824 which is like 1.07 gig.
B.
From: Chris Nauroth
Sent: Tuesday, November 03, 2015 11:57 AM
To: user@hadoop.apache.org
Subject: Re: hadoop not using whole disk for HDFS
Hi Bob,
Does the hdfs-site.xml configuration file contain the property dfs.datanode.du.reserved? If this is defined, then the DataNode intentionally will not use this space for storage of replicas.
<property>
<name>dfs.datanode.du.reserved</name>
<value>0</value>
<description>Reserved space in bytes per volume. Always leave this much space free for non dfs use.
</description>
</property>
--Chris Nauroth
From: MBA <ad...@hotmail.com>
Reply-To: "user@hadoop.apache.org" <us...@hadoop.apache.org>
Date: Tuesday, November 3, 2015 at 10:51 AM
To: "user@hadoop.apache.org" <us...@hadoop.apache.org>
Subject: hadoop not using whole disk for HDFS
I’ve got the Hortonworks distro running on a three node cluster. For some reason the disk available for HDFS is MUCH less than the total disk space. Both of my data nodes have 3TB hard drives. Only 100GB of that is being used for HDFS. Is it possible that I have a setting wrong somewhere?
B.
Re: hadoop not using whole disk for HDFS
Posted by "Adaryl \"Bob\" Wakefield, MBA" <ad...@hotmail.com>.
Yeah. It has the current value of 1073741824 which is like 1.07 gig.
B.
From: Chris Nauroth
Sent: Tuesday, November 03, 2015 11:57 AM
To: user@hadoop.apache.org
Subject: Re: hadoop not using whole disk for HDFS
Hi Bob,
Does the hdfs-site.xml configuration file contain the property dfs.datanode.du.reserved? If this is defined, then the DataNode intentionally will not use this space for storage of replicas.
<property>
<name>dfs.datanode.du.reserved</name>
<value>0</value>
<description>Reserved space in bytes per volume. Always leave this much space free for non dfs use.
</description>
</property>
--Chris Nauroth
From: MBA <ad...@hotmail.com>
Reply-To: "user@hadoop.apache.org" <us...@hadoop.apache.org>
Date: Tuesday, November 3, 2015 at 10:51 AM
To: "user@hadoop.apache.org" <us...@hadoop.apache.org>
Subject: hadoop not using whole disk for HDFS
I’ve got the Hortonworks distro running on a three node cluster. For some reason the disk available for HDFS is MUCH less than the total disk space. Both of my data nodes have 3TB hard drives. Only 100GB of that is being used for HDFS. Is it possible that I have a setting wrong somewhere?
B.
Re: hadoop not using whole disk for HDFS
Posted by "Adaryl \"Bob\" Wakefield, MBA" <ad...@hotmail.com>.
Yeah. It has the current value of 1073741824 which is like 1.07 gig.
B.
From: Chris Nauroth
Sent: Tuesday, November 03, 2015 11:57 AM
To: user@hadoop.apache.org
Subject: Re: hadoop not using whole disk for HDFS
Hi Bob,
Does the hdfs-site.xml configuration file contain the property dfs.datanode.du.reserved? If this is defined, then the DataNode intentionally will not use this space for storage of replicas.
<property>
<name>dfs.datanode.du.reserved</name>
<value>0</value>
<description>Reserved space in bytes per volume. Always leave this much space free for non dfs use.
</description>
</property>
--Chris Nauroth
From: MBA <ad...@hotmail.com>
Reply-To: "user@hadoop.apache.org" <us...@hadoop.apache.org>
Date: Tuesday, November 3, 2015 at 10:51 AM
To: "user@hadoop.apache.org" <us...@hadoop.apache.org>
Subject: hadoop not using whole disk for HDFS
I’ve got the Hortonworks distro running on a three node cluster. For some reason the disk available for HDFS is MUCH less than the total disk space. Both of my data nodes have 3TB hard drives. Only 100GB of that is being used for HDFS. Is it possible that I have a setting wrong somewhere?
B.
Re: hadoop not using whole disk for HDFS
Posted by "Adaryl \"Bob\" Wakefield, MBA" <ad...@hotmail.com>.
Yeah. It has the current value of 1073741824 which is like 1.07 gig.
B.
From: Chris Nauroth
Sent: Tuesday, November 03, 2015 11:57 AM
To: user@hadoop.apache.org
Subject: Re: hadoop not using whole disk for HDFS
Hi Bob,
Does the hdfs-site.xml configuration file contain the property dfs.datanode.du.reserved? If this is defined, then the DataNode intentionally will not use this space for storage of replicas.
<property>
<name>dfs.datanode.du.reserved</name>
<value>0</value>
<description>Reserved space in bytes per volume. Always leave this much space free for non dfs use.
</description>
</property>
--Chris Nauroth
From: MBA <ad...@hotmail.com>
Reply-To: "user@hadoop.apache.org" <us...@hadoop.apache.org>
Date: Tuesday, November 3, 2015 at 10:51 AM
To: "user@hadoop.apache.org" <us...@hadoop.apache.org>
Subject: hadoop not using whole disk for HDFS
I’ve got the Hortonworks distro running on a three node cluster. For some reason the disk available for HDFS is MUCH less than the total disk space. Both of my data nodes have 3TB hard drives. Only 100GB of that is being used for HDFS. Is it possible that I have a setting wrong somewhere?
B.
Re: hadoop not using whole disk for HDFS
Posted by Chris Nauroth <cn...@hortonworks.com>.
Hi Bob,
Does the hdfs-site.xml configuration file contain the property dfs.datanode.du.reserved? If this is defined, then the DataNode intentionally will not use this space for storage of replicas.
<property>
<name>dfs.datanode.du.reserved</name>
<value>0</value>
<description>Reserved space in bytes per volume. Always leave this much space free for non dfs use.
</description>
</property>
--Chris Nauroth
From: MBA <ad...@hotmail.com>>
Reply-To: "user@hadoop.apache.org<ma...@hadoop.apache.org>" <us...@hadoop.apache.org>>
Date: Tuesday, November 3, 2015 at 10:51 AM
To: "user@hadoop.apache.org<ma...@hadoop.apache.org>" <us...@hadoop.apache.org>>
Subject: hadoop not using whole disk for HDFS
I've got the Hortonworks distro running on a three node cluster. For some reason the disk available for HDFS is MUCH less than the total disk space. Both of my data nodes have 3TB hard drives. Only 100GB of that is being used for HDFS. Is it possible that I have a setting wrong somewhere?
B.
Re: hadoop not using whole disk for HDFS
Posted by Chris Nauroth <cn...@hortonworks.com>.
Hi Bob,
Does the hdfs-site.xml configuration file contain the property dfs.datanode.du.reserved? If this is defined, then the DataNode intentionally will not use this space for storage of replicas.
<property>
<name>dfs.datanode.du.reserved</name>
<value>0</value>
<description>Reserved space in bytes per volume. Always leave this much space free for non dfs use.
</description>
</property>
--Chris Nauroth
From: MBA <ad...@hotmail.com>>
Reply-To: "user@hadoop.apache.org<ma...@hadoop.apache.org>" <us...@hadoop.apache.org>>
Date: Tuesday, November 3, 2015 at 10:51 AM
To: "user@hadoop.apache.org<ma...@hadoop.apache.org>" <us...@hadoop.apache.org>>
Subject: hadoop not using whole disk for HDFS
I've got the Hortonworks distro running on a three node cluster. For some reason the disk available for HDFS is MUCH less than the total disk space. Both of my data nodes have 3TB hard drives. Only 100GB of that is being used for HDFS. Is it possible that I have a setting wrong somewhere?
B.
Re: hadoop not using whole disk for HDFS
Posted by Chris Nauroth <cn...@hortonworks.com>.
Hi Bob,
Does the hdfs-site.xml configuration file contain the property dfs.datanode.du.reserved? If this is defined, then the DataNode intentionally will not use this space for storage of replicas.
<property>
<name>dfs.datanode.du.reserved</name>
<value>0</value>
<description>Reserved space in bytes per volume. Always leave this much space free for non dfs use.
</description>
</property>
--Chris Nauroth
From: MBA <ad...@hotmail.com>>
Reply-To: "user@hadoop.apache.org<ma...@hadoop.apache.org>" <us...@hadoop.apache.org>>
Date: Tuesday, November 3, 2015 at 10:51 AM
To: "user@hadoop.apache.org<ma...@hadoop.apache.org>" <us...@hadoop.apache.org>>
Subject: hadoop not using whole disk for HDFS
I've got the Hortonworks distro running on a three node cluster. For some reason the disk available for HDFS is MUCH less than the total disk space. Both of my data nodes have 3TB hard drives. Only 100GB of that is being used for HDFS. Is it possible that I have a setting wrong somewhere?
B.
Re: hadoop not using whole disk for HDFS
Posted by Chris Nauroth <cn...@hortonworks.com>.
Hi Bob,
Does the hdfs-site.xml configuration file contain the property dfs.datanode.du.reserved? If this is defined, then the DataNode intentionally will not use this space for storage of replicas.
<property>
<name>dfs.datanode.du.reserved</name>
<value>0</value>
<description>Reserved space in bytes per volume. Always leave this much space free for non dfs use.
</description>
</property>
--Chris Nauroth
From: MBA <ad...@hotmail.com>>
Reply-To: "user@hadoop.apache.org<ma...@hadoop.apache.org>" <us...@hadoop.apache.org>>
Date: Tuesday, November 3, 2015 at 10:51 AM
To: "user@hadoop.apache.org<ma...@hadoop.apache.org>" <us...@hadoop.apache.org>>
Subject: hadoop not using whole disk for HDFS
I've got the Hortonworks distro running on a three node cluster. For some reason the disk available for HDFS is MUCH less than the total disk space. Both of my data nodes have 3TB hard drives. Only 100GB of that is being used for HDFS. Is it possible that I have a setting wrong somewhere?
B.