[torqueusers] Torque Error: multi-req PBS jobs not allowed

Steve Young chemadm at hamilton.edu
Mon Apr 20 17:09:08 MDT 2009


Hi,
	I have this in our maui.cfg:

ENABLEMULTINODEJOBS	TRUE

Not sure if it will help you or not.  I don't have ENABLEMULTIREQJOBS  
or JOBNODEMATCHPOLICY set.

-Steve


On Apr 20, 2009, at 5:59 PM, Rahul Nabar wrote:

> Often I need to request 9 cpus on our architecture with 8 cpus/server.
> In such situations it makes sense to ask for a full server (8 cpus)
> plus 1 more cpu wherever I can get it.
>
> What is the best request to do this? [Scheduler: PBS-Torque;
> Super-scheduler: Maui]
>
> I am trying
> #PBS -l nodes=1:ppn=8+1:ppn=1
>
> The job gets queued but checkjob reveals an error due to which it  
> won't run:
>
> Torque Error: multi-req PBS jobs not allowed
>
>
> On the other hand jobs with the following request run without trouble:
> #PBS -l nodes=node01:ppn=8+node02:ppn=1
>
> Why is one form (more restrictive) ok and the other (less restrictive)
> not? Is this just non-intuitive behavior or a PBS bug?
>
> Some googling shows that perhaps "ENABLEMULTIREQJOBS" might be my
> solution (http://www.clusterresources.com/products/maui/docs/a.fparameters.shtml 
> ).
> But just wanted to get an opinion if others have this enabled or not.
> What, if any, are the downsides?
>
> Why would PBS-Torque not allow this and my previous threads
> "JOBNODEMATCHPOLICY EXACTNODE" by default? Are there any reasons not
> to use them? The compromise is not obvious to me.
>
>
>
> -- 
> Rahul
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