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<div class="moz-cite-prefix">On 10/17/18 1:20 PM, Kurt Strosahl
wrote:<br>
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<p style="margin-top:0;margin-bottom:0">Good Afternoon,</p>
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<p>I believe 2.10.* is the long time support.</p>
<p>I am happy with 2.10.5 on my standard performance cluster but
for a very high performance cluster I built 5 months ago where
6GB/s per each OSS<br>
</p>
<p>where required in read and write transfers I had some problem
with file locking using Lustre 2.10.3 when having many writers.</p>
<p>This issue did not show up with Lustre 2.11.0 so that I Went for
it.<br>
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<p style="margin-top:0;margin-bottom:0"> I'm in the early
planning stages of a lustre upgrade. We are going to be
moving from 2.5 to either 2.10 or 2.11, possibly by standing
up a new lustre file system alongside the existing one and
migrating the data over. I'm wondering if anyone has had
specific experiences (either positive or negative) with either
of these versions.</p>
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<p style="margin-top:0;margin-bottom:0">I was also looking for,
but couldn't seem to find, a mapping of zfs versions to lustre
versions. Am I correct in my assumption that zfs 0.7.9 will
work with either version?</p>
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</p>
<p style="margin-top:0;margin-bottom:0">Finally, does anyone
have experience with zfs as the backing for the MDS/MDT?</p>
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<p>I have several MDS/MDT on ZFS and they are also virtual machines
and I never had issues with them.</p>
<p><br>
</p>
<p>anyway especially regarding the OSSes you may eventually need
some ZFS module parameters optimizations regarding vdev_write and
vdev_read max to increase those values higher than default. You
may also disable ZIL, change the redundant_metadata to "most"
atime off.</p>
<p><br>
</p>
<p>I could send you a list of parameters that in my case work well.<br>
</p>
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<p style="margin-top:0;margin-bottom:0">w/r,</p>
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<p style="margin-top:0; margin-bottom:0"><span
id="ms-rterangepaste-start"></span><span
style="color:rgb(51,51,51); font-family:monospace;
font-size:14.16px">Kurt J. Strosahl</span><br
style="color:rgb(51,51,51); font-family:monospace;
font-size:14.16px">
<span style="color:rgb(51,51,51); font-family:monospace;
font-size:14.16px">System Administrator: HPC, Lustre</span><br
style="color:rgb(51,51,51); font-family:monospace;
font-size:14.16px">
<span style="color:rgb(51,51,51); font-family:monospace;
font-size:14.16px">Scientific Computing Group, Thomas
Jefferson National Accelerator Facility</span><span
id="ms-rterangepaste-end"></span><br>
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<pre class="moz-quote-pre" wrap="">_______________________________________________
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