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>