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<p class="MsoNormal">I don’t think there’s a way to do that in Slurm using just the node declaration, other than the previously mentioned way of configuring it to show up as having only 1 core. However, you could put the node in a partition that has OverSubscribe=EXCLUSIVE
set, and have that partition be the only way to get to it:<o:p></o:p></p>
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<p class="MsoNormal"># in slurm.conf<o:p></o:p></p>
<p class="MsoNormal">NodeName=singlejobnode […settings…]<o:p></o:p></p>
<p class="MsoNormal">PartitionName=onejobatatime Nodes=singlejobnode OverSubscribe=EXCLUSIVE<o:p></o:p></p>
<p class="MsoNormal"># singlenodejob isn’t in any other partitions.<o:p></o:p></p>
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<p class="MsoNormal"> --Troy<o:p></o:p></p>
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<p class="MsoNormal"><b><span style="font-size:12.0pt;color:black">From: </span></b><span style="font-size:12.0pt;color:black">slurm-users <slurm-users-bounces@lists.schedmd.com> on behalf of Rutger Vos <rutger.vos@naturalis.nl><br>
<b>Reply-To: </b>Slurm User Community List <slurm-users@lists.schedmd.com><br>
<b>Date: </b>Wednesday, April 29, 2020 at 2:55 PM<br>
<b>To: </b>"slurm-users@lists.schedmd.com" <slurm-users@lists.schedmd.com><br>
<b>Subject: </b>[slurm-users] one job at a time - how to set?<o:p></o:p></span></p>
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<p class="MsoNormal">Hi, <o:p></o:p></p>
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<p class="MsoNormal">for a smallish machine that has been having degraded performance we want to implement a policy where only one job (submitted with sbatch) is allowed to run and any others submitted after it are supposed to wait in line.<o:p></o:p></p>
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<p class="MsoNormal">I assumed this was straightforward but I can't seem to figure it out. Can I set that up in slurm.conf or in some other way? Thank you very much for your help. BTW we are running slurm 15.08.7 if that is at all relevant.<br clear="all">
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<p class="MsoNormal">Best wishes,<o:p></o:p></p>
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<p class="MsoNormal"><span style="font-family:"Arial",sans-serif">Dr. Rutger A. Vos</span>
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<p class="MsoNormal"><span style="font-family:"Arial",sans-serif">Researcher / Bioinformatician</span><o:p></o:p></p>
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<p class="MsoNormal"><span style="border:solid windowtext 1.0pt;padding:0in"><img width="32" height="32" style="width:.3333in;height:.3333in" id="_x0000_i1026" src="cid:~WRD000.jpg" alt="Image removed by sender."></span><o:p></o:p></p>
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<sub><span style="font-family:"Arial",sans-serif">+31717519600 - +31627085806 </span>
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<p class="MsoNormal"><sub><span style="font-family:"Arial",sans-serif"><a href="mailto:rutger.vos@naturalis.nl" target="_blank">rutger.vos@naturalis.nl</a> - <a href="https://urldefense.com/v3/__https:/www.naturalis.nl__;!!KGKeukY!lICnByTlEa4aaGokt6HkYTWlNmf7Zbx0wQvzaVx4nR9mTz-BdQKUBmfxaIcu$" target="_blank">www.naturalis.nl</a></span></sub><o:p></o:p></p>
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<p class="MsoNormal"><sub><span style="font-family:"Arial",sans-serif">Darwinweg 2, 2333 CR Leiden</span></sub><o:p></o:p></p>
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<p class="MsoNormal"><sub><span style="font-family:"Arial",sans-serif">Postbus 9517, 2300 RA Leiden</span></sub><o:p></o:p></p>
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<p class="MsoNormal"><a href="https://urldefense.com/v3/__https:/www.naturalis.nl/lang-leve__;!!KGKeukY!lICnByTlEa4aaGokt6HkYTWlNmf7Zbx0wQvzaVx4nR9mTz-BdQKUBnzTiaLN$" target="_blank"><span style="color:windowtext;text-decoration:none"><span style="color:blue;border:solid windowtext 1.0pt;padding:0in"><img border="0" width="32" height="32" style="width:.3333in;height:.3333in" id="_x0000_i1025" src="cid:~WRD000.jpg" alt="Image removed by sender."></span></span></a><o:p></o:p></p>
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