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<p>It seems that there are some details that would need addressed.</p>
<p>A suspend signal is nothing more than sending a SIGSTP (like
hitting ctrl-s), so the application is still in memory awaiting
SIGCONT</p>
<p>So what should happen when it continues and there are no more
licenses? So the proper place for what you are looking for is in
the application itself. If it is given a SIGSTP, it could release
the licenses and then check them out again when SIGCONT is
received.</p>
<p>If you are able to tell your app to release/request a license
externally, you may want to have a wrapper to do the signal
handling until they have it as part of their app.</p>
<p>Brian Andrus</p>
<p><br>
</p>
<div class="moz-cite-prefix">On 10/14/2019 4:40 AM, Oytun Peksel
wrote:<br>
</div>
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<p class="MsoNormal"><span style="color:#1F497D" lang="EN-US">It
is quite weird if slurm has no mechanism as described. I
have been digging more into it and someone suggested a
workaround using mail notifications. You use a script
instead of the mail application and catch the event then use
use sacct to see what is happening.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D" lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D" lang="EN-US">Two
problems with this:
<o:p></o:p></span></p>
<p class="MsoListParagraph"
style="text-indent:-18.0pt;mso-list:l0 level1 lfo1"><!--[if !supportLists]--><span
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style="mso-list:Ignore">·<span style="font:7.0pt
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</span></span></span><!--[endif]--><span
style="color:#1F497D" lang="EN-US">There is no mail sent
with suspended preemption<o:p></o:p></span></p>
<p class="MsoListParagraph"
style="text-indent:-18.0pt;mso-list:l0 level1 lfo1"><!--[if !supportLists]--><span
style="font-family:Symbol;color:#1F497D" lang="EN-US"><span
style="mso-list:Ignore">·<span style="font:7.0pt
"Times New Roman"">
</span></span></span><!--[endif]--><span
style="color:#1F497D" lang="EN-US">If you use requeue
instead there will be a mail event and you can catch it.
Sacct will flag it as “preempted” so you know it is
requeued. But then it would change it pending. So you really
need to be quick to catch it. Also there is no distinctive
flag for resuming.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D" lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D" lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D" lang="EN-US">Anyone
has any other method to execute scripts during preemption?<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D" lang="EN-US"><o:p> </o:p></span></p>
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<p class="MsoNormal" style="line-height:10.0pt"><b><span
style="font-size:10.0pt;color:black;mso-fareast-language:SV">Oytun Peksel</span></b><span
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<p class="MsoNormal" style="line-height:10.0pt"><span
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href="mailto:oytun.peksel@semcon.com"
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</span></a><o:p></o:p></span></p>
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<p class="MsoNormal" style="line-height:10.0pt"><span
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<p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
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<p class="MsoNormal"><b><span
style="mso-fareast-language:SV" lang="EN-US">From:</span></b><span
style="mso-fareast-language:SV" lang="EN-US">
slurm-users
<a class="moz-txt-link-rfc2396E" href="mailto:slurm-users-bounces@lists.schedmd.com"><slurm-users-bounces@lists.schedmd.com></a>
<b>On Behalf Of </b>Oytun Peksel<br>
<b>Sent:</b> den 11 oktober 2019 09:10<br>
<b>To:</b> <a class="moz-txt-link-abbreviated" href="mailto:slurm-users@lists.schedmd.com">slurm-users@lists.schedmd.com</a><br>
<b>Subject:</b> [slurm-users] Execute scripts on suspend
and cancel<o:p></o:p></span></p>
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<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Hi,<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">I was wondering is there an option in Slurm
to execute custom scripts before Suspend signal. What I need
to do is to tell an application to release it’s licenses
before sending the suspend signal during preemption. I think
went through all the documentation but could not find a
mechanism like this.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">BR<o:p></o:p></p>
<p class="MsoNormal">/Oytun<o:p></o:p></p>
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