Rather than maximize fragmentation, you probably want to do it on a
per-job basis. If you want one core per node: sbatch: -N $numnodes -n
$numnodes. Anything else would require the -m flag. I haven't played
with it recently but I think you would want -m cyclic.
Ryan
On 05/08/2014 11:49 AM, Atom Powers wrote:
How to spread jobs among nodes?
It appears that my Slurm cluster is scheduling jobs to load up nodes
as much as possible before putting jobs on other nodes. I understand
the reasons for doing this, however I foresee my users wanting to
spread jobs out among as many nodes as possible for various reasons,
some of which are even valid.
How would I configure the scheduler to distribute jobs in something
like a round-robin fashion to many nodes instead of loading jobs onto
just a few nodes?
I currently have:
'SchedulerType' => 'sched/builtin',
'SelectTypeParameters' => 'CR_Core_Memory',
'SelectType' => 'select/cons_res',
--
Perfection is just a word I use occasionally with mustard.
--Atom Powers--
--
Ryan Cox
Operations Director
Fulton Supercomputing Lab
Brigham Young University
