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<div>I have no experience with this, but based on my understanding of the doc, the shutdown command should be something like "ssh ${node} systemctl shutdown", and the resume "ipmitool -I lan -H ${node}-bmc -U <User ID> -f password_file.txt chassis power on
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<div>If you use libvirt for your virtual cluster, you can test waking nodes up via ipmi using virtual bmc <a href="https://github.com/openstack/virtualbmc">https://github.com/openstack/virtualbmc</a> (the doc is a bit terse unfortunately).</div>
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<div>Best,</div>
<div>Nicolas Granger</div>
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<div>Le jeudi 28 juillet 2022 à 11:49 -0400, Djamil Lakhdar-Hamina a écrit :</div>
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<div dir="ltr">I am helping set up a 16 node cluster computing system, I am not a system-admin but I work for a small firm and unfortunately have to pick up needed skills fast in things I have little experience in. I am running Rocky Linux 8 on Intel Xeon Knights
Landings nodes donated by the TAAC center. We are operating in Uganda where we have limited resources and where power is quite expensive.
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<div>What are some good ways to implement power-saving ? I have already tried power saving as per slurms power saving guide but 1) I am not quite sure what it does and 2) in implementing a version on my virtual dev environment I was able to get the power saving
to stand down nodes, but I was not able to get the power saving mechanism to spin them back up when needed. I put power saving in the slurm.cfg file, and I also specified a SuspendProgram and a ResumeProgram similar to the one in the <a href="https://slurm.schedmd.com/power_save.html">https://slurm.schedmd.com/power_save.html</a>. </div>
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<div>So 1) how do I get this power saving mechanism to work, what exactly will it do, I see it stands nodes down, will it spin them back up on request of those resources? 2) Are there any better techniques for power saving, say using IPMItool or something? </div>
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<div>Sincerely, </div>
<div>Djamil Lakhdar-Hamina</div>
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