[torqueusers] Problem with ppn and routing

Garrick Staples garrick at usc.edu
Tue Nov 30 10:39:33 MST 2010

On Tue, Nov 30, 2010 at 09:44:08AM -0700, David Beer alleged:
> ----- Original Message -----
> > -snip-
> > > set queue fast resources_max.nodes = 2:ppn=2
> > -snip-
> > > set queue batch resources_max.nodes = 1:ppn=1
> > 
> > My understanding is that torque can/will only do useful comparisons on
> > numeric fields so the above settings are not meaningful. You might be
> > OK with resources_max.nodect (though that might not be numeric either)
> > but could only filter on the number of nodes not the number of
> > processes requested (and you would need a default nodes=1 which I
> > would prefer not to set so we can use procs as an option...). I don't
> > think this solves your problem but might point you (or others) in the
> > right direction.
> > 
> > -- Gareth
> At some point (I believe 2.5) we added the ability to use resources_max.nodes in queue limitations, but it only sorts based on the number of nodes, not ppn. We couldn't sort based on ppn because of the inherent ambiguities - which is larger, nodes=1:ppn=2 or nodes=2:ppn=1 - so we only sort based on the first number there. This means that a job requesting nodes=1:ppn=2 will be accepted by the batch queue.

So now what does max/min.nodect mean?

Garrick Staples, GNU/Linux HPCC SysAdmin
University of Southern California

Life is Good!
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