[torqueusers] strange behaviour of ppn

Govind govind.rhul at googlemail.com
Wed Nov 24 00:15:12 MST 2010


Hi Chris,

We are using both openmpi (complied with torque support) and mpich.
In both the cases it run jobs on single slot only. Please advise if i
required need any specific configuration on torque.

Regards
Govind

On Wed, Nov 24, 2010 at 2:41 AM, Christopher Samuel
<samuel at unimelb.edu.au>wrote:

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> On 24/11/10 03:22, Govind wrote:
>
> > So it looks like me it run the tasks only on single slot out of 4 slots.
>
> Which MPI are you using ?   Does it now how to talk to Torque ?
>
> If it doesn't then you'll need to tell it to use the
> $PBS_NODEFILE as the list of nodes to run the job on.
>
> But it's much better to use something like Open-MPI or
> the OSC mpiexec which do know how to talk to Torque about
> launching jobs, then you won't have to tell it how many
> processess to run or where they should go.
>
> All the best,
> Chris
> - --
>  Christopher Samuel - Senior Systems Administrator
>  VLSCI - Victorian Life Sciences Computational Initiative
>  Email: samuel at unimelb.edu.au Phone: +61 (0)3 903 55545
>         http://www.vlsci.unimelb.edu.au/
>
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