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<p>remember the informal discussion opportunity today at 10:00am in
CEBAF Center room F224.</p>
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<th valign="BASELINE" nowrap="nowrap" align="RIGHT">Subject:
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<td>[Jlab-scicomp-briefs] Batch Farm Change: PBS to Slurm on
June 3rd</td>
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<th valign="BASELINE" nowrap="nowrap" align="RIGHT">Date: </th>
<td>Mon, 20 May 2019 20:15:50 +0000</td>
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<th valign="BASELINE" nowrap="nowrap" align="RIGHT">From: </th>
<td>Bryan Hess <a class="moz-txt-link-rfc2396E" href="mailto:bhess@jlab.org"><bhess@jlab.org></a></td>
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<th valign="BASELINE" nowrap="nowrap" align="RIGHT">To: </th>
<td><a class="moz-txt-link-abbreviated" href="mailto:jlab-scicomp-briefs@jlab.org">jlab-scicomp-briefs@jlab.org</a>
<a class="moz-txt-link-rfc2396E" href="mailto:jlab-scicomp-briefs@jlab.org"><jlab-scicomp-briefs@jlab.org></a></td>
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<p style="margin:0in">The farm has been gradually migrating to
the Slurm workload manager over the past few months, replacing
the legacy PBS system. We are planning the final transition of
farm nodes for Tuesday, June 3rd. For most users this will not
be a significant change because the primary submission
mechanism for the farm will continue to be Auger or SWIF.
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<p style="margin:0in"> </p>
<p style="margin:0in">There are a few differences in the way
Slurm behaves that surfaced during this transition when some
SWIF workflows were redirected to Slurm. Most notably, Slurm
directs standard output and standard error to volatile space
where it will be automatically cleaned after 2 months. Very
large stdout/stderr may be cleaned up after two weeks.<span
style="mso-spacerun:yes">
</span>Job stdout/stderr is visible on hosts mounting Lustre
at /farm_out/<username>.
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<p style="margin:0in"> </p>
<p style="margin:0in">The Slurm farm nodes are currently running
CentOS 7.2. They will be updated to 7.6 once the Slurm
migration has been completed. This will be a subsequent change
announced in advance.</p>
<p style="margin:0in"> </p>
<p style="margin:0in">To address questions about this change and
the farm, we are scheduling an informal discussion opportunity
for next Tuesday, May 28th at 10:00am in CEBAF Center room
F224. Incident reports are also welcome for specific issues.
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<p style="margin:0in"> </p>
<p style="margin:0in">Detailed documentation about submitting to
Slurm today is available at
<a href="https://scicomp.jlab.org/docs/auger_slurm"
moz-do-not-send="true">https://scicomp.jlab.org/docs/auger_slurm</a></p>
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