On 08/11/2019 16:52, Skylar Thompson wrote: > We don't run diskless systems, but use cgroups where possible to limit the > damage users can do to a node. We derate the node's total usable memory by > 2GB (OS) + GPFS pagepool to avoid paging whenever possible. >
I would add that as the RAM in the node rises swap becomes pointless. We find that it's a bit pointless at 192GB of RAM in a node, for our large memory nodes which have 3TB of RAM, swap is utterly pointless. In fact there is more RAM than there is disk space. In either case the old rules about setting swap to be twice RAM or even swap equals RAM are either hard to achieve to impossible. JAB. -- Jonathan A. Buzzard Tel: +44141-5483420 HPC System Administrator, ARCHIE-WeSt. University of Strathclyde, John Anderson Building, Glasgow. G4 0NG _______________________________________________ gpfsug-discuss mailing list gpfsug-discuss at spectrumscale.org http://gpfsug.org/mailman/listinfo/gpfsug-discuss