[slurm-users] (no subject)

[GRANGER Nicolas]

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 ".
If you use libvirt for your virtual cluster, you can test waking nodes up via ipmi using virtual bmc https://github.com/openstack/virtualbmc (the doc is a bit terse unfortunately).

Best,
Nicolas Granger

Le jeudi 28 juillet 2022 à 11:49 -0400, Djamil Lakhdar-Hamina a écrit :
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.

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 https://slurm.schedmd.com/power_save.html.

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?

Sincerely,
Djamil Lakhdar-Hamina

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