[slurm-users] random allocation of resources

Guillaume COCHARD guillaume.cochard at cc.in2p3.fr
Wed Dec 1 19:18:27 UTC 2021


I think you are looking for the LLN option (Least Loaded Nodes): https://slurm.schedmd.com/slurm.conf.html#OPT_LLN


----- Mail original -----
De: "Benjamin Nacar" <benjamin_nacar at brown.edu>
À: slurm-users at lists.schedmd.com
Envoyé: Mercredi 1 Décembre 2021 20:07:23
Objet: [slurm-users] random allocation of resources


Is there a scheduling option such that, when there are multiple nodes 
that are equivalent in terms of available and allocated resources, Slurm 
would select randomly from among those nodes?

I've noticed that if no other jobs are running, and I submit a single 
job via srun, with no parameters to specify anything other than the 
defaults, the job *always* runs on the first node in slurm.conf. This 
seems like it would lead to some hosts getting overused and others 
getting underused. I'd like the stress on our hardware to be reasonably 
evenly distributed.

~~ bnacar

Benjamin Nacar
Systems Programmer
Computer Science Department
Brown University

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