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Subject: Re: [OMPI users] Problem with running openMPI program
From: Gus Correa (gus_at_[hidden])
Date: 2009-04-29 12:19:10


Hi Ankush

You can run the MITgcm ocean model test cases and the CAM3 atmospheric
model test with two processors only, but the codes scale well to
any number of processors.
They are "real life" applications, but not too hard to get to work.
It will take some reading of their README and INSTALL files,
and perhaps of their User Guides to understand how they work, though.

You can even run them on a single processor, but if you want to make
the point that your cluster OpenMPI works, you want also to use more
than one processor.

You can download the tarballs from these links:

http://mitgcm.org/download/
http://www.ccsm.ucar.edu/models/atm-cam/download/

CAM3 will require the NetCDF package, which is easy to install also:
http://www.unidata.ucar.edu/downloads/netcdf/netcdf-3_6_3/index.jsp

You can even get the NetCDF package with yum, if you prefer.
(Try "yum info netcdf".)

However, the MITgcm can work even without NetCDF (although it can
benefit from NetCDF also).

Of course there are simpler MPI programs out there, but they may be
what you called "mathematical computations" as opposed to "real life
applications". :)

Somebody already sent you this link before.
It has some simpler MPI programs:

http://www.pdc.kth.se/training/Tutor/MPI/Templates/index-frame.html

These (online) books may have some MPI program examples:

Ian Foster's (online) book (Ch. 8 is on MPI):

http://www.wotug.org/parallel/books/addison-wesley/dbpp/text/book.html

Peter Pacheco's book (a short version is online):

http://www.cs.usfca.edu/mpi/

Here are other MPI program examples (not all are guaranteed to work):

http://www2.cs.uh.edu/~johnson2/labs.html
http://www.redbooks.ibm.com/redbooks/SG245380.html

See more links to MPI tutorials, etc, here:
http://fats-raid.ldeo.columbia.edu/pages/parallel_programming.html#mpi

I hope this helps.

Gus Correa
---------------------------------------------------------------------
Gustavo Correa
Lamont-Doherty Earth Observatory - Columbia University
Palisades, NY, 10964-8000 - USA
---------------------------------------------------------------------

Ankush Kaul wrote:
> @Gus
>
> the applications in the links u have sent are really high level n i
> believe really expensive too as i will have 2 have a physical apparatus
> for various measurements along with the cluster. Am i right?
>
>
>
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