[mpich-discuss] using hydra to start a task on a specific node

[Pavan Balaji]

Please note that some of these features are added after mpich2-1.2.1p1 
was released (such as the hostlist parameter).

But if you are feeling adventurous today, read on :-).

You can pick the Hydra version from mpich2-1.3b1 
(http://www.mcs.anl.gov/research/projects/mpich2/downloads/tarballs/1.3b1/hydra-1.3b1.tar.gz) 
and use it to run applications compiled with mpich2-1.2.1p1.

Building this new Hydra separately will give you an "mpiexec" and some 
other executables files, which you can directly use with your existing 
1.2.1p1 application. Just have the "--prefix" point to your existing 
MPICH2's install location.

  -- Pavan

On 08/19/2010 06:09 PM, Camilo Rostoker wrote:
> I asked this question just a few days ago and Pavan suggested the
> following which worked for me:
>
>
> host/hosts/hostlist is a global parameter that affects all executables.
> Can you try this:
>
> % mpiexec -hostlist node01:5,node02:4,node03:2 -n 5 ./exec1 : -n 4
> ./exec2 : -n 2 ./exec3
>
>
>
>
>
>
>
> On Thu, Aug 19, 2010 at 5:03 PM, Rajnish <rajnish at cc.gatech.edu
> <mailto:rajnish at cc.gatech.edu>> wrote:
>
>     Hi,
>
>     Is it possible to use mpiexec.hydra to start a task on a specific node?
>
>     Something like:
>
>     mpiexec -host node1 task1
>
>     But I would like to use mpiexec.hydra to have the above effect?
>
>     Thanks in advance,
>     - Raj.
>
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-- 
Pavan Balaji
http://www.mcs.anl.gov/~balaji