Parallel octave ??

[Javier Fernández]

Sangamesh B wrote:
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>
> Today's Topics:
>
>    5. Re: Parallel octave ?? (Sangamesh B)
>   
>
> ------------------------------------------------------------------------
>
> Subject:
> Re: Parallel octave ??
> From:
> "Sangamesh B" <forum.san at gmail.com>
>
> Thanks for your response,
>
> Still I'm not getting LAM-MPI working. Once its done I'll install MPITB.

MPITB should also work with Open-MPI, that's an option too. To be used 
with MPITB they should be compiled for dynamic libraries (shared objects 
.so).

>
> I guess octave can not be run using mpirun.

yes it can :-)

> So on octave command prompt, some MPI functions have to be used.
That's also an option. I find MPI_Comm_spawn easier to use with LAM/MPI 
. The LLAMAS (the old LAM Team) made a very convenient MPI_Info item 
called "lam_spawn_sched_round_robin" with which you can 
MPI_Comm_spawn(..., info) and have the children started on the nodes you 
want (as long as they were lambooted together with your spawning node).

On the other hand, I found mpirun easier to use with Open-MPI, since no 
daemon has to be previously started (no equivalent to lamboot is 
required in OMPI). Recently there was a question on spawning in their 
mailing list, but I'm not sure they're talking on this same issue
http://www.open-mpi.org/community/lists/users/2008/08/index.php
http://www.open-mpi.org/community/lists/users/2008/07/6211.php
http://www.open-mpi.org/community/lists/users/2008/08/6256.php
The "subject" matches the point, anyways. I suppose I miss the 
"spawn_sched" info tag I was used to in LAM :-)

>
> Thank you,
> Sangamesh

You're welcome

>
> On Wed, Sep 3, 2008 at 12:45 PM, Michael Creel <michael.creel at uab.es 
> <mailto:michael.creel at uab.es>> wrote:
>
>     MPITB works fine with the latest Octave 3.0.x. It's available ready to
>     run on the PelicanHPC live CD, with some examples, if you would like
>     to try it. I haven't tried MPITB with Octave 3.1.x yet.
>     M.
>

>     >
>     > I don't know if it will be a simple installation, but the author is
>     > still active.
>     >
>     >        Thomas
>
Thank you all :-)

-javier