[Gluster-users] determine filename from shard?

[Amar Tumballi]

Awesome, thanks!

Then, I hope this
https://github.com/gluster/glusterfs/commit/ab2558a3e7a1b2de2d63a3812ab4ed58d10d8619
is
included in the build.

What it means is, if you just list the xattrs of the file, you can get the
file name (pgfid/basename) format. If there are no duplicate filenames,
then it will be easy. Otherwise, you would need to use aux-gfid-mount to
get details as told in the patch.


   1.

    mount -t glusterfs -o aux-gfid-mount 127.0.0.2:testvol /mnt/aux_mount

   2. and then try doing the operation as told in commit message above on
   /mnt/aux_mount/.gfid/<gfid>


Regards,
Amar


On Mon, Oct 14, 2019 at 9:13 PM WK <wkmail at bneit.com> wrote:

> 6.5 on Ubuntu 18
>
>
> On 10/13/2019 10:14 PM, Amar Tumballi wrote:
>
> Which is the version of GlusterFS you are using?
>
> There are few methods like 'gfid2path' option to fetch details of the file
> path from a gfid in versions above v6.0
>
>
>
>
> On Mon, Oct 14, 2019 at 8:14 AM wkmail <wkmail at bneit.com> wrote:
>
>> We recently were trying to track down a high load situation on a KVM
>> node in a cluster running gluster (replication2 + arb).
>>
>> Iotop on the affected node showed that gluster was involved showing
>> abnormally heavy writes. There wasn't any obvious activity on the
>> network coming into the VMs, so it was something internal to one of
>> them, so we had to keep looking
>>
>> We then used gluster volume top which showed that a couple of shards
>> were being pounded but we didn't see a way to immediately associate
>> those shards with their VM file.
>>
>> We eventually figured out the problem VM using other methods and
>> resolved the issue, but we would still like to know if there is a script
>> or recipe to determine what file a shard may belong to as that would
>> have sped up the resolution.
>>
>> -wk
>>
>>
>>
>>
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