[slurm-users] how to allocate high priority to low cpu and memory jobs

[z1...@arcor.de]

Dear all,

how can I reverse the priority, so that jobs with high cpu and memory
have a low priority?


The Priority/Multifactor plugin it is possible to calculate high
priority for high cpu and memory jobs.

With PriorityFavorSmall, jobs with a lower cpu number have a high
priority, but this only works for cpu, not memory.


Thanks,

Mike

[Renfro, Michael]

Since there's only 9 factors to assign priority weights to, one way around this might be to set up separate partitions for high memory and low memory jobs (with a max memory allowed for the low memory partition), and then use partition weights to separate those jobs out.

 

From: slurm-users <slurm-use...@lists.schedmd.com> on behalf of z1...@arcor.de <z1...@arcor.de>
Date: Tuesday, January 25, 2022 at 3:20 PM
To: slurm-users <slurm...@schedmd.com>
Subject: [slurm-users] how to allocate high priority to low cpu and memory jobs

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________________________________

[Rémi Palancher]

------- Original Message -------

Well, there are several options available for this use case, and the best choice mostly depends of your current configuration.

Additionnaly to Michael proposal with the partitions, you could also set up a QOS for low memory jobs, with a high priority and MaxTRESPerJob.

--
Rémi Palancher
Rackslab: Open Source Solutions for HPC Operations
https://rackslab.io

[z1...@arcor.de]

There aren't many mods in my slurm conf.

Since the priority/multifactor with PriorityWeightTres is already
active, it would be possible to take QOS.

Could you give a configuration example?
For example, jobs could occupy 1-128GB, i.e. categorization of ...16,
32, 64, 128 is necessary?
Two categories low and high would not be sufficient.


Many Thanks

Mike