Just a tip: Make sure that the kernel has support for constraining swap space. I believe we once had to reinstall one of our clusters once because we had forgotten to check that. You should get an error in slurmd.log if it cannot set the swap limit (i.e., if the kernel does not support it).
-- Regards, Bjørn-Helge Mevik, dr. scient, Department for Research Computing, University of Oslo
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