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<p class="MsoNormal">Matt,<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Depending on other parameters for the job, your ‘--ntasks=30’ is likely having the effect of requesting 30 (or more) cores for that individual job, which likely is not “fitting” on an individual node (oversubscribe allows multiple jobs
to share a resource, but doesn’t impact resource request/requirements for an individual job).<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">The best approach will depend on the particulars of the job itself, but setting “--ntasks-per-core” in conjunction with the “--ntasks=30” would be one way to allow a job with more tasks than the core count on any of your nodes to run.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Matt Jay<o:p></o:p></p>
<p class="MsoNormal">HPC Systems Engineer - Hyak<o:p></o:p></p>
<p class="MsoNormal"><span style="font-size:9.5pt">Research Computing</span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-size:9.5pt">University of Washington Information Technology</span><o:p></o:p></p>
<p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
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<p class="MsoNormal"><b>From:</b> slurm-users [mailto:slurm-users-bounces@lists.schedmd.com]
<b>On Behalf Of </b>Matt Hohmeister<br>
<b>Sent:</b> Thursday, September 26, 2019 1:56 PM<br>
<b>To:</b> Slurm User Community List <slurm-users@lists.schedmd.com><br>
<b>Subject:</b> Re: [slurm-users] Running multiple jobs simultaneously<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">I just did that…beautiful…thanks! The “default” let me run 48 jobs concurrently across two nodes.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">I’ve noticed that, still, when I have “#SBATCH --ntasks=30” in my .sbatch file, the job still refuses to run, and I’m back at the below. Should I just ask my users to not use –ntasks in their .sbatch files?<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<pre>[<a href="https://lists.schedmd.com/cgi-bin/mailman/listinfo/slurm-users">mhohmeis at odin</a> ~]$ squeue<o:p></o:p></pre>
<pre> JOBID PARTITION NAME USER ST TIME NODES NODELIST(REASON)<o:p></o:p></pre>
<pre> 2052_[70-100] debug whatever mhohmeis PD 0:00 4 (PartitionConfig)<o:p></o:p></pre>
<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">Matt Hohmeister<o:p></o:p></p>
<p class="MsoNormal">Systems and Network Administrator<o:p></o:p></p>
<p class="MsoNormal">Department of Psychology<o:p></o:p></p>
<p class="MsoNormal">Florida State University<o:p></o:p></p>
<p class="MsoNormal">PO Box 3064301<o:p></o:p></p>
<p class="MsoNormal">Tallahassee, FL 32306-4301<o:p></o:p></p>
<p class="MsoNormal">Phone: +1 850 645 1902<o:p></o:p></p>
<p class="MsoNormal">Fax: +1 850 644 7739<br>
Pronouns: he/him/his<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal"><b>From:</b> slurm-users <<a href="mailto:slurm-users-bounces@lists.schedmd.com">slurm-users-bounces@lists.schedmd.com</a>>
<b>On Behalf Of </b>Matt Jay<br>
<b>Sent:</b> Thursday, September 26, 2019 4:34 PM<br>
<b>To:</b> Slurm User Community List <<a href="mailto:slurm-users@lists.schedmd.com">slurm-users@lists.schedmd.com</a>><br>
<b>Subject:</b> Re: [slurm-users] Running multiple jobs simultaneously<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Hi Matt,<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Check out the “OverSubscribe” partition parameter. Try setting your partition to “OverSubscribe=YES” and then submitting the jobs with the “—oversubscibe” option (or OverSubscribe=FORCE if you want this to happen for all jobs submitted
to the partition). Either oversubscribe option can be followed by a colon and the maximum number of jobs that can be assigned to a resource (iirc it defaults to 4 – so you might want to increase to allow the number of jobs you need – ie, maximum number of
jobs you need to run simultaneously divided by number of cores available in the partition).<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Matt Jay<o:p></o:p></p>
<p class="MsoNormal">HPC Systems Engineer - Hyak<o:p></o:p></p>
<p class="MsoNormal"><span style="font-size:9.5pt">Research Computing</span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-size:9.5pt">University of Washington Information Technology</span><o:p></o:p></p>
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