Pranith Kumar Karampuri
2015-Feb-12 07:24 UTC
[Gluster-users] Performance loss from 3.4.2 to 3.6.2
On 02/12/2015 04:37 AM, Nico Schottelius wrote:> Hello, > > switching from 3.4.2 to 3.6.2 reduces our average test performance dramatically. > > Our test setup: directly connected 1 GBit/s hosts setup with: > > rm -rf /home/gluster/.glusterfs/ > rm /home/gluster/* > setfattr -x trusted.glusterfs.volume-id /home/gluster/ > setfattr -x trusted.gfid /home/gluster/ > gluster volume create xfs-plain replica 2 transport tcp vmhost1-cluster1:/home/gluster vmhost2-cluster1:/home/gluster > gluster volume start xfs-plain > > Afterwards we run our near real world test > > mount -t glusterfs vmhost1-cluster1:/xfs-plain /mnt/gluster/ > while true; do dd if=redmine-from-ceph-20150204 of=/mnt/gluster/testvm bs=1M; rm /mnt/gluster/testvm; done > > The results are > > 3.4.2: ~71-72 MiB/s [ubuntu 14.04] > 3.6.2: ~59-64 MiB/s [gluster-3.6 ppa] > > We have removed 3.6.2 and re-installed 3.4.2 and can consistently reproduce > these numbers over hours of testing.Could you repeat the test on 3.6.2 with 'volume set <volname> cluster.ensure-durability off' option and post the results. Pranith> > Is there any configuration change that we need to incorporate to run > 3.6.2 faster or is this a known problem? > > Cheers, > > Nico >
Dear Pranith
I would be interested to know what the cluster.ensure-durability off option
does, could you explain or point to the documentation?
RegardsML
On Thursday, February 12, 2015 8:24 AM, Pranith Kumar Karampuri
<pkarampu at redhat.com> wrote:
On 02/12/2015 04:37 AM, Nico Schottelius wrote:> Hello,
>
> switching from 3.4.2 to 3.6.2 reduces our average test performance
dramatically.
>
> Our test setup: directly connected 1 GBit/s hosts setup with:
>
>? ? ? rm -rf /home/gluster/.glusterfs/
>? ? ? rm /home/gluster/*
>? ? ? setfattr -x trusted.glusterfs.volume-id? /home/gluster/
>? ? ? setfattr -x trusted.gfid /home/gluster/
>? ? ? gluster volume create xfs-plain replica 2 transport tcp
vmhost1-cluster1:/home/gluster vmhost2-cluster1:/home/gluster
>? ? ? gluster volume start xfs-plain
>
> Afterwards we run our near real world test
>
>? ? ? mount -t glusterfs vmhost1-cluster1:/xfs-plain /mnt/gluster/
>? ? ? while true; do dd if=redmine-from-ceph-20150204 of=/mnt/gluster/testvm
bs=1M; rm /mnt/gluster/testvm; done
>
> The results are
>
>? ? ? 3.4.2: ~71-72 MiB/s? ? [ubuntu 14.04]
>? ? ? 3.6.2: ~59-64 MiB/s? ? [gluster-3.6 ppa]
>
> We have removed 3.6.2 and re-installed 3.4.2 and can consistently reproduce
> these numbers over hours of testing.
Could you repeat the test on 3.6.2 with 'volume set <volname>
cluster.ensure-durability off' option and post the results.
Pranith>
> Is there any configuration change that we need to incorporate to run
> 3.6.2 faster or is this a known problem?
>
> Cheers,
>
> Nico
>
_______________________________________________
Gluster-users mailing list
Gluster-users at gluster.org
http://www.gluster.org/mailman/listinfo/gluster-users
-------------- next part --------------
An HTML attachment was scrubbed...
URL:
<http://www.gluster.org/pipermail/gluster-users/attachments/20150212/26d9a436/attachment.html>