[Mauiusers] Exclusive node access

Lim Ryan rlim3 at unl.edu
Wed Mar 17 12:53:06 MDT 2010


Hello,

Unfortunately we have a lot of single core jobs and it would be a waste of resources if the other CPU cores could not be utilized if nodes have a restricted access policy by default. :(


Regards,
- ryan


Ryan Lim
Systems Administrator
Holland Computing Center
University of Nebraska - Lincoln
email: rlim3 at unl.edu / voice: (402) 554-2323 / web: http://hcc.unl.edu/





On Mar 15, 2010, at 1:49 PM, Alexis Cousein wrote:

>> I'm trying to get exclusive node access with the Maui + Torque installation that I have.
> 
>> I run
>>   qsub -I -l walltime=1:00:00,select=10 -W x="NACCESSPOLICY:SINGLETASK"
> 
> That's what I usually use
> 
> NACCESSPOLICY SINGLEJOB
> JOBNODEMATCHPOLICY EXACTNODE
> 
> <the defaults used by most customers I know, as they have hybrid MPI/OpenMP codes>
> 
> and
> 
> -lnodes=10:ppn=1
> 
> for...
> 
> ...that may be a good alternative (if it works).
> 
> 
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