[Mauiusers] detecting and scheduling vmem

Gareth.Williams at csiro.au Gareth.Williams at csiro.au
Thu Feb 19 23:08:42 MST 2009


Hi All,

I have been working with CR to get a patch in maui and moab to improve treatment of vmem.  The patch is in maui-3.2.6p21-snap.1234905291 and will be in upcoming moab releases.  Many thanks to Brian Christiansen at CR.

With the patch, maui/moab correctly detects a node's available vmem as being the total physical memory plus swap space.  This can then be scheduled/allocated by requesting vmem and job's virtual memory allocation can be limited on a per process basis and periodically measured (and action taken or overuse) on a per job basis.

I think this makes scheduling on vmem a good option.  It's a more predictable quantity than mem/pmem. 

Regards,

Gareth Williams
CSIRO IM&T - ASC


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