[torqueusers] Re: [Mauiusers] MAXNODES broken?
csamuel at vpac.org
Wed Nov 3 15:04:00 MST 2004
On Thu, 4 Nov 2004 08:05 am, John Wagner wrote:
> No easy way to get a random allocation. But if you are using a cluster
> built with bi-proc nodes then
> qsub -l nodes=45:ppn=2
> will give you 90 processors spread over 45 nodes (i.e 45 nodes with 2
> job processors each on them).
> qsub -l nodes=45:ppn=2+1:ppn=1
> will give you 45 nodes with 2 job processors allocated plus one node
> with 1 job processor allocated giving you 91 processors in total.
Yup, I'm aware of this, but it doesn't help when you've got 90 CPUs spread
around in a fairly haphazard manner due to other folks jobs.
What we really want is a way to say to someone wanting to run a large job
"just do this and you'll get N (where N>90) CPUs across the cluster",
otherwise you've got to wait a long time (potentially months with some of our
users) to get your job running for your requested configuration to appear..
> I don't know of anyway to say you want 91 processors randomly
> distributed anywhere there are free "job slots" within the cluster.
This is what I'm really after, anyone got any clues ?
> I hope this helps to solve your problem.
Sadly not, this has been a long standing whinge of mine.. :-)
Christopher Samuel - (03)9925 4751 - VPAC Systems & Network Admin
Victorian Partnership for Advanced Computing http://www.vpac.org/
Bldg 91, 110 Victoria Street, Carlton South, VIC 3053, Australia
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