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Posted to user@hbase.apache.org by "shanmuganathan.r" <sh...@zohocorp.com> on 2011/07/26 11:08:25 UTC

Run the namenode and master seperately?

Hi All,

            How we will run the Namenode  and the HMaster in separate hosts ? Please give me some guide lines about this area.


where we give the this one is the HMaster ? In my configuration of HBase, i  didn't mention the HMaster in the any configuration file. I simply run the hmaster in the namenode .
If we have the possibility to run the namenode and hmaster separately , give where we mention this running environment.


Thanks in advance...


Regards


Shanmuganathan

RE: Run the namenode and master seperately?

Posted by "Buttler, David" <bu...@llnl.gov>.
By default the master starts on the machine that you run start-hbase.sh on

You can control which machine the master starts on by running:
ssh <machine-name> ${HBASE_HOME}/bin/hbase-daemon.sh --config "${HBASE_CONF_DIR}" start master

You can create a derivative of the start-hbase.sh script to insert the 'ssh <machine-name>' if you still want to launch from the namenode machine, but want the master to run on another machine

Dave

-----Original Message-----
From: shanmuganathan.r [mailto:shanmuganathan.r@zohocorp.com] 
Sent: Tuesday, July 26, 2011 4:10 AM
To: user@hbase.apache.org
Subject: RE: Run the namenode and master seperately?



Hi All,

            The hbase.rootdir property is used to specify the HDFS location where we store the hbase works . is it right?


If we want to run the HMaster in separate machine in the cluster , than where we specify the master. is there no need to specify the master anywhere in the configuration?




---- On Tue, 26 Jul 2011 15:05:49 +0530 Ramkrishna S Vasudevan &lt;ramakrishnas@huawei.com&gt; wrote ---- 

Hi Shanmuganathan, 
 
Use the following property in HBASE-SITE.XML to specify the HDFS path. 
Ensure that you have the host name mapping of the namenode and the master 
machine. 
 
 &lt;property&gt; 
 &lt;name&gt;hbase.rootdir&lt;/name&gt; 
 &lt;value&gt;hdfs://linux76:9000/hbase&lt;/value&gt; 
 &lt;description&gt;The directory shared by region servers. 
 &lt;/description&gt; 
 &lt;/property&gt; 
 &lt;property&gt; 
 
Hope this information is useful. 
 
Regards 
Ram 
 
 
-----Original Message----- 
From: shanmuganathan.r [mailto:shanmuganathan.r@zohocorp.com] 
Sent: Tuesday, July 26, 2011 2:38 PM 
To: user@hbase.apache.org 
Subject: Run the namenode and master seperately? 
 
 
Hi All, 
 
 How we will run the Namenode and the HMaster in separate hosts 
? Please give me some guide lines about this area. 
 
 
where we give the this one is the HMaster ? In my configuration of HBase, i 
didn't mention the HMaster in the any configuration file. I simply run the 
hmaster in the namenode . 
If we have the possibility to run the namenode and hmaster separately , give 
where we mention this running environment. 
 
 
Thanks in advance... 
 
 
Regards 
 
 
Shanmuganathan

RE: Run the namenode and master seperately?

Posted by "shanmuganathan.r" <sh...@zohocorp.com>.

Hi All,

            The hbase.rootdir property is used to specify the HDFS location where we store the hbase works . is it right?


If we want to run the HMaster in separate machine in the cluster , than where we specify the master. is there no need to specify the master anywhere in the configuration?




---- On Tue, 26 Jul 2011 15:05:49 +0530 Ramkrishna S Vasudevan &lt;ramakrishnas@huawei.com&gt; wrote ---- 

Hi Shanmuganathan, 
 
Use the following property in HBASE-SITE.XML to specify the HDFS path. 
Ensure that you have the host name mapping of the namenode and the master 
machine. 
 
 &lt;property&gt; 
 &lt;name&gt;hbase.rootdir&lt;/name&gt; 
 &lt;value&gt;hdfs://linux76:9000/hbase&lt;/value&gt; 
 &lt;description&gt;The directory shared by region servers. 
 &lt;/description&gt; 
 &lt;/property&gt; 
 &lt;property&gt; 
 
Hope this information is useful. 
 
Regards 
Ram 
 
 
-----Original Message----- 
From: shanmuganathan.r [mailto:shanmuganathan.r@zohocorp.com] 
Sent: Tuesday, July 26, 2011 2:38 PM 
To: user@hbase.apache.org 
Subject: Run the namenode and master seperately? 
 
 
Hi All, 
 
 How we will run the Namenode and the HMaster in separate hosts 
? Please give me some guide lines about this area. 
 
 
where we give the this one is the HMaster ? In my configuration of HBase, i 
didn't mention the HMaster in the any configuration file. I simply run the 
hmaster in the namenode . 
If we have the possibility to run the namenode and hmaster separately , give 
where we mention this running environment. 
 
 
Thanks in advance... 
 
 
Regards 
 
 
Shanmuganathan

RE: Run the namenode and master seperately?

Posted by Ramkrishna S Vasudevan <ra...@huawei.com>.
Hi Shanmuganathan,

Use the following property in HBASE-SITE.XML to specify the HDFS path.
Ensure that you have the host name mapping of the namenode and the master
machine.

  <property> 
    <name>hbase.rootdir</name> 
    <value>hdfs://linux76:9000/hbase</value> 
    <description>The directory shared by region servers. 
    </description> 
  </property> 
  <property>

Hope this information is useful.

Regards
Ram


-----Original Message-----
From: shanmuganathan.r [mailto:shanmuganathan.r@zohocorp.com] 
Sent: Tuesday, July 26, 2011 2:38 PM
To: user@hbase.apache.org
Subject: Run the namenode and master seperately?


Hi All,

            How we will run the Namenode  and the HMaster in separate hosts
? Please give me some guide lines about this area.


where we give the this one is the HMaster ? In my configuration of HBase, i
didn't mention the HMaster in the any configuration file. I simply run the
hmaster in the namenode .
If we have the possibility to run the namenode and hmaster separately , give
where we mention this running environment.


Thanks in advance...


Regards


Shanmuganathan