[Mauiusers] Can´t get busy nodes

Antonio Messina amessina at ictp.it
Wed Sep 28 01:05:05 MDT 2011

On 28/09/11 05.26, Denis wrote:
> You are missing to inform pbs that you are using 8 cores.
> you have to add before anything runs in your script a line:
> #PBS -lnodes=8
> Torque cannot trace the number of mpi processes. A user could request
> 4 cpus and start n mpi processes for example.
> So, requesting it in your script as
> #PBS -lnodes=8
> then running mpirun -np 8 will do the job.

As a side note, in order to prevent jobs submitted with 
wrong/missing arguments to interfere with other jobs, we use a 
feature of the kernel called *cpuset*, which seems to work very well.

Torque: 2.5.5
Maui:   3.3.1
doc: http://www.clusterresources.com/torquedocs21/3.5linuxcpusets.shtml


Antonio Messina
I.T. Specialist

email: amessina at ictp.it      |  The Abdus Salam ICTP
phone: +39 040-2240-691      |  Strada Costiera, 11
fax:   +39 040-2240-7691     |  34151 Trieste, Italy

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