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Subject: [OMPI users] [gentryx@gmx.de: Re: 2 questions about Open MPI]
From: Andreas Schäfer (gentryx_at_[hidden])
Date: 2008-03-25 11:15:00


Hallöle,

On 13:34 Tue 25 Mar , powernetfreak_at_[hidden] wrote:
> So Open MPI is OS dependent and actually it dont support Windows
> plattforms.

Equating "not running on Windows" to "OS dependent" is a bit harsh, as
Open MPI will run on any Unixish OS (Linux, Solaris, BSD...). You
could have some luck with compiling Open MPI with Cygwin, then you'd
have it for Windows. But I'm not sure about the Cygwin stuff.

> I would want to know if (Open) MPI sipports data decomposition and\ or
> task level parallelism.

It supports data decomposition and you can build pretty much any form
of parallelism you like.

> But i also think that OpenMPI dont support data decomposition (like
> here described: http://www.netlib.org/pvm3/book/node32.html ) "out-of-
> the-box".

MPI does support data decomposition. The thing you need to understand
is that MPI stands for Message Passing Interface, i.e. it is used to
pass messages (possibly containing data). The functions defined in the
MPI standard provide a rich cornucopia of functions helping you to
distribute your data among nodes in whichever creative and colorful
way you like.

Cheers!
-Andreas

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Andreas Schäfer
Cluster and Metacomputing Working Group
Friedrich-Schiller-Universität Jena, Germany
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