[Moabusers] Re: [torquedev] Re: [torqueusers] Allocating resources by CPUs

[Chris Samuel]

On Mon, 19 Mar 2007, Joshua Bernstein wrote:

> You figure out how many CPUs you want across the the entire cluster
> by simply multiplying the nodes times the ppn.

The issue we have is people bringing job scripts from dual CPU nodes (ppn=2) 
to quad CPU nodes and not adjusting the ppn values resulting in a lot of free 
nodes and a lot of jobs not running.

Disabling JOBNODEMATCHPOLICY EXACTNODE does that and is exactly what we want, 
but some people want to be able to do...

> Otherwise simply notating nodes=x says that you want x number of cpus, since
> the nodes argument specifies the number of default number of "virtual cpus",
> not nodes (as is often confused)

...what you say here but still be able to have nodes=n:ppn=X definitions 
honoured (and not converted into "at least X CPUs per node with n*X CPUs in 
total") and, to be honest, I don't blame them.

cheers,
Chris
-- 
 Christopher Samuel - (03)9925 4751 - VPAC Deputy Systems Manager
 Victorian Partnership for Advanced Computing http://www.vpac.org/
 Bldg 91, 110 Victoria Street, Carlton South, VIC 3053, Australia

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