[slurm-users] Increasing job priority based on resources requested.

Ryan Novosielski novosirj at rutgers.edu
Thu Apr 18 21:27:19 UTC 2019

This is not an official answer really, but I’ve always just considered this to be the way that the scheduler works. It wants to get work completed, so it will have a bias toward doing what is possible vs. not (can’t use 239GB of RAM on a 128GB node). And really, is a higher priority what you want? I’m not so sure. How soon will someone figure out that they might get a higher priority based on requesting some feature they don’t need?

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> On Apr 18, 2019, at 5:20 PM, Prentice Bisbal <pbisbal at pppl.gov> wrote:
> Slurm-users,
> Is there away to increase a jobs priority based on the resources or constraints it has requested?
> For example, we have a very heterogeneous cluster here: Some nodes only have 1 Gb Ethernet, some have 10 Gb Ethernet, and others have DDR IB. In addition, we have some large memory nodes with RAM amounts ranging from 128 GB up to 512 GB. To allow a user to request IB, I have implemented that as a feature in the node definition so users can request that as a constraint.
> I would like to make it that if a job request IB, it's priority will go up, or if it requests a lot of memory (specifically memory-per-cpu), it's priority will go up proportionately to the amount of memory requested. Is this possible? If so, how?
> I have tried going through the documentation, and googling, but 'priority' is used to discuss job priority so much, I couldn't find any search results relevant to this.
> -- 
> Prentice

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