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Posted to users@trafficserver.apache.org by Jason Yang <pe...@gmail.com> on 2019/03/04 15:59:08 UTC
How to config the raw disk?
Hi
I am trying to setup ATS 8.0.2 on AWS EC2 using m5d instance (with local disk)
I am running traffic server using user ubuntu and the instance has disk like following
nvme0n1 259:0 0 279.4G 0 disk
nvme1n1 259:1 0 279.4G 0 disk
nvme2n1 259:2 0 8G 0 disk
└─nvme2n1p1 259:3 0 8G 0 part /
I added the following lines to /etc/udev/rules.d/51-cache-disk.rules
SUBSYSTEM==block, KERNEL==nvme[0123456789], GROUP:=ubuntu
SUBSYSTEM==block, KERNEL==nvme[0123456789]n1, GROUP:=ubuntu
and my storage.config
/dev/nvme0n1 label=cache.disk.0
/dev/nvme1n1 label=cache.disk.1
But it seems it is not working and I am getting "WARNING: unable to open '/dev/nvme0n1': Permission denied”.
Am I doing something wrong? Thank you!
Jason
Re: How to config the raw disk?
Posted by Alan Carroll <so...@verizonmedia.com>.
Unfortunately that's not possible at this time. What has been done is to
have two layers of ATS with the ones in front having a smaller cache and
the backing layer caching on the second request for the object Or it could
be by time
On Mon, Mar 4, 2019 at 1:39 PM Jason Yang <pe...@gmail.com>
wrote:
> Hi Alan,
> Thank you for your quick response! It is helpful! I did "udevadm
> trigger --subsystem-match=block” using root, which seems doesn’t work, so I
> did it again using user ubuntu, now it is working! Thank you!
>
> But I have another question, is there anyway to have ATS store content in
> the RAM for a while before writing to disk?
> Because my origin sends some content, then there is some chance this
> content may be changed within a few seconds (origin will push again), if I
> can store the content in the RAM for while, it can potentially save some
> disk reads/writes.
>
>
> Best,
> Jason
>
>
> On Mar 4, 2019, 11:53 -0500, Alan Carroll <
> solidwallofcode@verizonmedia.com>, wrote:
>
> 1) Did you do an `ls -l /dev/nvme*` to verify the permissions are what you
> think you set in the udev file?
> 2) Does group "ubuntu" have write permission?
> 3) Did you set the process group for `traffic_server` to be "ubuntu"? See
> https://docs.trafficserver.apache.org/en/8.0.x/admin-guide/files/records.config.en.html#proxy-config-admin-user-id
> - the primary group of the user ID will be used as the effective group ID
> of `traffic_server`.
>
> On Mon, Mar 4, 2019 at 9:59 AM Jason Yang <pe...@gmail.com>
> wrote:
>
>> Hi
>> I am trying to setup ATS 8.0.2 on AWS EC2 using m5d instance (with local
>> disk)
>>
>> I am running traffic server using user ubuntu and the instance has disk
>> like following
>> nvme0n1 259:0 0 279.4G 0 disk
>> nvme1n1 259:1 0 279.4G 0 disk
>> nvme2n1 259:2 0 8G 0 disk
>> └─nvme2n1p1 259:3 0 8G 0 part /
>>
>> I added the following lines to /etc/udev/rules.d/51-cache-disk.rules
>> SUBSYSTEM==block, KERNEL==nvme[0123456789], GROUP:=ubuntu
>> SUBSYSTEM==block, KERNEL==nvme[0123456789]n1, GROUP:=ubuntu
>>
>> and my storage.config
>> /dev/nvme0n1 label=cache.disk.0
>> /dev/nvme1n1 label=cache.disk.1
>>
>> But it seems it is not working and I am getting "WARNING: unable to open
>> '/dev/nvme0n1': Permission denied”.
>>
>>
>> Am I doing something wrong? Thank you!
>>
>>
>> Jason
>>
>>
>>
>>
>>
Re: How to config the raw disk?
Posted by Jason Yang <pe...@gmail.com>.
Hi Alan,
Thank you for your quick response! It is helpful! I did "udevadm trigger --subsystem-match=block” using root, which seems doesn’t work, so I did it again using user ubuntu, now it is working! Thank you!
But I have another question, is there anyway to have ATS store content in the RAM for a while before writing to disk?
Because my origin sends some content, then there is some chance this content may be changed within a few seconds (origin will push again), if I can store the content in the RAM for while, it can potentially save some disk reads/writes.
Best,
Jason
On Mar 4, 2019, 11:53 -0500, Alan Carroll <so...@verizonmedia.com>, wrote:
> 1) Did you do an `ls -l /dev/nvme*` to verify the permissions are what you think you set in the udev file?
> 2) Does group "ubuntu" have write permission?
> 3) Did you set the process group for `traffic_server` to be "ubuntu"? See https://docs.trafficserver.apache.org/en/8.0.x/admin-guide/files/records.config.en.html#proxy-config-admin-user-id - the primary group of the user ID will be used as the effective group ID of `traffic_server`.
>
> > On Mon, Mar 4, 2019 at 9:59 AM Jason Yang <pe...@gmail.com> wrote:
> > > Hi
> > > I am trying to setup ATS 8.0.2 on AWS EC2 using m5d instance (with local disk)
> > >
> > > I am running traffic server using user ubuntu and the instance has disk like following
> > > nvme0n1 259:0 0 279.4G 0 disk
> > > nvme1n1 259:1 0 279.4G 0 disk
> > > nvme2n1 259:2 0 8G 0 disk
> > > └─nvme2n1p1 259:3 0 8G 0 part /
> > >
> > > I added the following lines to /etc/udev/rules.d/51-cache-disk.rules
> > > SUBSYSTEM==block, KERNEL==nvme[0123456789], GROUP:=ubuntu
> > > SUBSYSTEM==block, KERNEL==nvme[0123456789]n1, GROUP:=ubuntu
> > >
> > > and my storage.config
> > > /dev/nvme0n1 label=cache.disk.0
> > > /dev/nvme1n1 label=cache.disk.1
> > >
> > > But it seems it is not working and I am getting "WARNING: unable to open '/dev/nvme0n1': Permission denied”.
> > >
> > >
> > > Am I doing something wrong? Thank you!
> > >
> > >
> > > Jason
> > >
> > >
> > >
> > >
Re: How to config the raw disk?
Posted by Alan Carroll <so...@verizonmedia.com>.
1) Did you do an `ls -l /dev/nvme*` to verify the permissions are what you
think you set in the udev file?
2) Does group "ubuntu" have write permission?
3) Did you set the process group for `traffic_server` to be "ubuntu"? See
https://docs.trafficserver.apache.org/en/8.0.x/admin-guide/files/records.config.en.html#proxy-config-admin-user-id
- the primary group of the user ID will be used as the effective group ID
of `traffic_server`.
On Mon, Mar 4, 2019 at 9:59 AM Jason Yang <pe...@gmail.com>
wrote:
> Hi
> I am trying to setup ATS 8.0.2 on AWS EC2 using m5d instance (with local
> disk)
>
> I am running traffic server using user ubuntu and the instance has disk
> like following
> nvme0n1 259:0 0 279.4G 0 disk
> nvme1n1 259:1 0 279.4G 0 disk
> nvme2n1 259:2 0 8G 0 disk
> └─nvme2n1p1 259:3 0 8G 0 part /
>
> I added the following lines to /etc/udev/rules.d/51-cache-disk.rules
> SUBSYSTEM==block, KERNEL==nvme[0123456789], GROUP:=ubuntu
> SUBSYSTEM==block, KERNEL==nvme[0123456789]n1, GROUP:=ubuntu
>
> and my storage.config
> /dev/nvme0n1 label=cache.disk.0
> /dev/nvme1n1 label=cache.disk.1
>
> But it seems it is not working and I am getting "WARNING: unable to open
> '/dev/nvme0n1': Permission denied”.
>
>
> Am I doing something wrong? Thank you!
>
>
> Jason
>
>
>
>
>