Thanks Pranith for the details. So with that option one would be trading data
consistency with performance. I am now interested to hear about Nico's new
tests with this option disabled...
On Thursday, February 12, 2015 9:23 AM, Pranith Kumar Karampuri
<pkara...@redhat.com> wrote:
On 02/12/2015 01:17 PM, ML mail wrote:
Dear Pranith
I would be interested to know what the cluster.ensure-durability off option
does, could you explain or point to the documentation?
By default replication translator does fsyncs on the files at certain times so
that it doesn't lose data when the filesystem crashes and changelogs that afr
stores are corrupted. This is introduced from 3.5.x on wards.
Pranith
Regards ML
On Thursday, February 12, 2015 8:24 AM, Pranith Kumar Karampuri
<pkara...@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@gluster.org
http://www.gluster.org/mailman/listinfo/gluster-users
_______________________________________________
Gluster-users mailing list
Gluster-users@gluster.org
http://www.gluster.org/mailman/listinfo/gluster-users
_______________________________________________
Gluster-users mailing list
Gluster-users@gluster.org
http://www.gluster.org/mailman/listinfo/gluster-users
