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<div class="moz-cite-prefix">On 02/12/2015 02:07 PM, ML mail wrote:<br>
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<div dir="ltr" id="yui_3_16_0_1_1423726434056_8934"><span
id="yui_3_16_0_1_1423726434056_9968">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...</span></div>
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<div dir="ltr"> <font size="2" face="Arial"> On Thursday,
February 12, 2015 9:23 AM, Pranith Kumar Karampuri
<a class="moz-txt-link-rfc2396E" href="mailto:pkarampu@redhat.com"><pkarampu@redhat.com></a> wrote:<br>
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<div class="yiv4422645265moz-cite-prefix">On
02/12/2015 01:17 PM, ML mail wrote:<br
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<div dir="ltr"
id="yiv4422645265yui_3_16_0_1_1423726434056_5540"><span>Dear
Pranith</span></div>
<div dir="ltr"><br clear="none">
<span></span></div>
<div dir="ltr"
id="yiv4422645265yui_3_16_0_1_1423726434056_5724"><span
id="yiv4422645265yui_3_16_0_1_1423726434056_5725">I would be interested
to know what the cluster.ensure-durability
off option does, could you explain or point
to the documentation?</span></div>
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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.<br clear="none">
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Just wanted to clarify that by 'filesystem' I mean backend
filesystems like XFS and EXT4.<br>
<br>
Pranith<br>
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Pranith<br clear="none">
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<span
id="yiv4422645265yui_3_16_0_1_1423726434056_5725"></span></div>
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id="yiv4422645265yui_3_16_0_1_1423726434056_5728"><span
id="yiv4422645265yui_3_16_0_1_1423726434056_5725">Regards</span></div>
<div dir="ltr"
id="yiv4422645265yui_3_16_0_1_1423726434056_5729"><span
id="yiv4422645265yui_3_16_0_1_1423726434056_5725">ML</span></div>
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<div dir="ltr"> <font size="2"
face="Arial"> On Thursday, February
12, 2015 8:24 AM, Pranith Kumar
Karampuri <a moz-do-not-send="true"
rel="nofollow" shape="rect"
class="yiv4422645265moz-txt-link-rfc2396E"
ymailto="mailto:pkarampu@redhat.com"
target="_blank"
href="mailto:pkarampu@redhat.com"><pkarampu@redhat.com></a>
wrote:<br clear="none">
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On 02/12/2015 04:37 AM, Nico Schottelius
wrote:<br clear="none">
> Hello,<br clear="none">
><br clear="none">
> switching from 3.4.2 to 3.6.2
reduces our average test performance
dramatically.<br clear="none">
><br clear="none">
> Our test setup: directly connected
1 GBit/s hosts setup with:<br
clear="none">
><br clear="none">
> rm -rf
/home/gluster/.glusterfs/<br
clear="none">
> rm /home/gluster/*<br
clear="none">
> setfattr -x
trusted.glusterfs.volume-id
/home/gluster/<br clear="none">
> setfattr -x trusted.gfid
/home/gluster/<br clear="none">
> gluster volume create
xfs-plain replica 2 transport tcp
vmhost1-cluster1:/home/gluster
vmhost2-cluster1:/home/gluster<br
clear="none">
> gluster volume start xfs-plain<br
clear="none">
><br clear="none">
> Afterwards we run our near real
world test<br clear="none">
><br clear="none">
> mount -t glusterfs
vmhost1-cluster1:/xfs-plain
/mnt/gluster/<br clear="none">
> while true; do dd
if=redmine-from-ceph-20150204
of=/mnt/gluster/testvm bs=1M; rm
/mnt/gluster/testvm; done<br
clear="none">
><br clear="none">
> The results are<br clear="none">
><br clear="none">
> 3.4.2: ~71-72 MiB/s [ubuntu
14.04]<br clear="none">
> 3.6.2: ~59-64 MiB/s
[gluster-3.6 ppa]<br clear="none">
><br clear="none">
> We have removed 3.6.2 and
re-installed 3.4.2 and can consistently
reproduce<br clear="none">
> these numbers over hours of
testing.<br clear="none">
Could you repeat the test on 3.6.2 with
'volume set <volname> <br
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cluster.ensure-durability off' option
and post the results.<br clear="none">
<br clear="none">
Pranith
<div class="yiv4422645265yqt9599502956"
id="yiv4422645265yqtfd71438"><br
clear="none">
><br clear="none">
> Is there any configuration change
that we need to incorporate to run<br
clear="none">
> 3.6.2 faster or is this a known
problem?<br clear="none">
><br clear="none">
> Cheers,<br clear="none">
><br clear="none">
> Nico<br clear="none">
><br clear="none">
<br clear="none">
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