[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

.a.

-- 
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

-------------- next part --------------
A non-text attachment was scrubbed...
Name: smime.p7s
Type: application/pkcs7-signature
Size: 2949 bytes
Desc: S/MIME Cryptographic Signature
Url : http://www.supercluster.org/pipermail/mauiusers/attachments/20110928/24201b91/attachment.bin 


More information about the mauiusers mailing list