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<p>Florian, <br>
</p>
<p><br>
</p>
<p>Not the OP, but I have a use case where we do this. We have a
code that uses checkpoint/restart, so for the users, being able to
calculate how much time they have until our maintenance
reservation starts allows them to submit restartable jobs right up
to the reservation start time to maximize cluster usage. <br>
</p>
<p><br>
</p>
<p>For checkpoint/restart-capable jobs, on clusters where routine
maintenance reservations are a thing, this can claim back valuable
CPU-hours that would otherwise go to waste. <br>
</p>
<p><br>
</p>
<p>I don't know the exact code they use to check reservation time,
but I know they do look at existing reservations and get the time
when the next reservation starts. The first time I set maintenance
reservations for several month's of maintenance in advance, they
had a cow because they didn't account for the situation where
there'd be more than one reservation in their code. <br>
</p>
<pre class="moz-signature" cols="72">Prentice</pre>
<div class="moz-cite-prefix">On 3/29/21 4:09 PM, Florian Zillner
wrote:<br>
</div>
<blockquote type="cite"
cite="mid:TY2PR03MB4493B492E9283CBD503A3E27A87E9@TY2PR03MB4493.apcprd03.prod.outlook.com">
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Hi,</div>
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255, 255);">
<br>
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<div style="font-family: Calibri, Helvetica, sans-serif;
font-size: 11pt; color: rgb(0, 0, 0); background-color: rgb(255,
255, 255);">
well, I think you're putting the cart before the horse, but
anyway, you could write a script that extracts the next
reservation and does some simple math to display the time in
hours or else to the user. It's the users job to set the time
their job needs to finish. Auto-squeezing a job that takes 2
days to complete into a remaining 2 hour window until the
reservation starts doesn't make any sense to me.</div>
<div style="font-family: Calibri, Helvetica, sans-serif;
font-size: 11pt; color: rgb(0, 0, 0); background-color: rgb(255,
255, 255);">
<br>
</div>
<div style="font-family: Calibri, Helvetica, sans-serif;
font-size: 11pt; color: rgb(0, 0, 0); background-color: rgb(255,
255, 255);">
# NEXTRES=$(scontrol show res | head -n1 | awk '{print $2}' |
cut -f2 -d= | xargs -I {} date +%s --date "{}" )
<div># NOW=$(date +%s)</div>
<div># echo "$(((NEXTRES - NOW) / 3600)) hours left until
reservation begins"</div>
<div>178 hours left until reservation begins</div>
</div>
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<div style="font-family: Calibri, Helvetica, sans-serif;
font-size: 11pt; color: rgb(0, 0, 0);">
<br>
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<div style="font-family: Calibri, Helvetica, sans-serif;
font-size: 11pt; color: rgb(0, 0, 0);">
Cheers,</div>
<div style="font-family: Calibri, Helvetica, sans-serif;
font-size: 11pt; color: rgb(0, 0, 0);">
Florian</div>
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<br>
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<div id="divRplyFwdMsg" dir="ltr"><font style="font-size: 11pt;"
face="Calibri, sans-serif" color="#000000"><b>From:</b>
slurm-users <a class="moz-txt-link-rfc2396E" href="mailto:slurm-users-bounces@lists.schedmd.com"><slurm-users-bounces@lists.schedmd.com></a> on
behalf of Jeremy Fix <a class="moz-txt-link-rfc2396E" href="mailto:Jeremy.Fix@centralesupelec.fr"><Jeremy.Fix@centralesupelec.fr></a><br>
<b>Sent:</b> Monday, 29 March 2021 10:48<br>
<b>To:</b> <a class="moz-txt-link-abbreviated" href="mailto:slurm-users@lists.schedmd.com">slurm-users@lists.schedmd.com</a>
<a class="moz-txt-link-rfc2396E" href="mailto:slurm-users@lists.schedmd.com"><slurm-users@lists.schedmd.com></a><br>
<b>Subject:</b> [External] [slurm-users] Autoset job TimeLimit
to fit in a reservation</font>
<div> </div>
</div>
<div class="BodyFragment"><font size="2"><span
style="font-size:11pt">
<div class="PlainText">Hi,<br>
<br>
I'm wondering if there is any built-in option to autoset a
job TimeLimit<br>
to fit within a defined reservation.<br>
<br>
For now, it seems to me that the timelimit must be
explicitely provided,<br>
in a agreement with the deadline of the reservation, by a
user when<br>
invoking the srun or sbatch command while I would find it
comfortable to<br>
let slurm calculate the remaining time of the reservation
on which<br>
srun/sbatch is executed and fill in the TimeLimit
accordingly;<br>
<br>
Best;<br>
<br>
Jeremy.<br>
<br>
<br>
</div>
</span></font></div>
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