CODEWITHSUNDEEP
slurm
quikq
quikq

Reputation: 425

How to find max number of tasks that I can run using slurm?

I have access to supercomputer that uses slurm, but I need one information, that I cannot find. How many parallel tasks can I run? I know I can use --ntasks to set the number, and e.g. if I have parallel prblen and I want to check it running 1000 processes I can run it with --ntasks 1000 but what sets max number? Nuber of nodes or number of CPUs or something else?

Upvotes: 1

Views: 1104

Answers (1)

damienfrancois
damienfrancois

Reputation: 59072

There is a physical limitation which is the total number of cores available in the cluster. You can check that with sinfo -o%C; the last number in the output will be the total number of CPUs.

There can also be limits defined in the "Quality of Services". You can see them with sacctmgr show qos. Look for the MaxTRES column.

But there can be also administrative limits specific to your user or your account. You can see them with sacctmgr show user $USER withassoc. Look for the MaxCPUMins column.

Upvotes: 4

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