Eli V <eliven...@gmail.com> writes: > On Wed, Dec 5, 2018 at 5:04 PM Bjørn-Helge Mevik <b.h.me...@usit.uio.no> > wrote: >> >> I don't think Slurm has any facility for soft memory limits. >> >> But you could emulate it by simply configure the nodes in slurm.conf >> with, e.g., 15% higher RealMemory value than what is actually available >> on the node. Then a node with 256 GiB RAM would be able to run 9 jobs, >> each asking for 32 GiB RAM. >> >> (You wouldn't get the effect that a job would be allowed to exceed its >> soft limit for a set amount of time before getting killed, though.) > > I don't think this is possible currently. From my experience slurm > will auto drain a node if it's actual physical memory is less then > what's defined for it in the slurm.conf.
True. I forgot about that. You could prevent slurm from draining them by setting FastSchedule=2 in slurm.conf, but then you wouldn't detect nodes losing RAM (which does happen from time to time). -- Regards, Bjørn-Helge Mevik, dr. scient, Department for Research Computing, University of Oslo
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