[Beowulf] Parallel programming using Scalapack and OpenMPI

Gus Correa gus at ldeo.columbia.edu
Mon Nov 30 15:15:42 EST 2009


Hi Amjad

amjad ali wrote:
> Hi,
> Please explain in detail about:
> 
> PETSc is certainly good for prototyping,
> although there is a learning curve.
> 
> What is meant by learning curve.  [?]

http://en.wikipedia.org/wiki/Learning_curve

Google is your friend!
Wikipedia is your friend!

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

> 
> 
> 
> On Mon, Nov 30, 2009 at 1:24 PM, Gus Correa <gus at ldeo.columbia.edu 
> <mailto:gus at ldeo.columbia.edu>> wrote:
> 
>     Hi Ivan
> 
>     PETSc (short for
>     Portable Extensible Toolkit for Scientific Computation,
>     from Argonne Natl. Lab.)
>     gives you the ability to use Scalapack
>     and provides a number of linear and PDE solvers:
> 
>     http://www.mcs.anl.gov/petsc/petsc-as/
> 
>     It builds on top of MPI, BLAS and LAPACK,
>     but you can bind it to a variety of Linear Algebra and
>     other packages, including Scalapack.
> 
>     IIRR, PETSc's default MPI is MPICH2, which is how
>     I built it here a while ago.
>     However, I think it can be built with OpenMPI as well.
>     See this FAQ:
>     http://www.open-mpi.org/faq/?category=mpi-apps#petsc
> 
>     PETSc has C, Fortran, C++, and Python APIs.
> 
>     Some people here used PETSc very successfully
>     (problems were solved, theses were written,
>     PhDs were awarded, papers were published)
>     on global ocean circulation inverse problems,
>     magma migration modeling (i.e., reactive fluid
>     flow in porous media, sounds familiar?), etc.
> 
>     PETSc is certainly good for prototyping,
>     although there is a learning curve.
>     As for efficiency and production codes, I don't know,
>     but you can check their FAQ:
> 
>     http://www.mcs.anl.gov/petsc/petsc-as/documentation/faq.html
> 
>     and mailing list,
>     where you may also find some useful information about
>     your questions and specific problem:
> 
>     https://lists.mcs.anl.gov/mailman/listinfo/petsc-users
>     http://lists.mcs.anl.gov/pipermail/petsc-users/
> 
>     In case you don't know, the (very simple)
>     Scalapack home page is on Netlib site:
> 
>     http://www.netlib.org/scalapack/scalapack_home.html
> 
> 
>     My two cents.
> 
>     Boa sorte!
>     Gus Correa
>     ---------------------------------------------------------------------
>     Gustavo Correa
>     Lamont-Doherty Earth Observatory - Columbia University
>     Palisades, NY, 10964-8000 - USA
>     ---------------------------------------------------------------------
> 
> 
>     Ivan Marin wrote:
> 
>         Hello all,
> 
>         I've been following the discussions here in this list for quite
>         a while and always enjoying the discussions, and did some admin
>         work in beowulf clusters. But after a long time far from
>         parallel programming, now for my PhD in groundwater simulation
>         I'm trying again to implement the linear solver pdgesv from
>         Scalapack. I'm having some troubles with the definitions in the
>         function call within C++ and the best data distribution, so I
>         would like to ask: is there anybody on this list developing with
>         Scalapack and C++? Where is the proper place to ask Scalapack
>         questions? It seems that both the forum and the mailing list
>         doesn't have any activity recently.
> 
>         Thank you in advance!
> 
>         Ivan Marin
> 
>         Laboratório de Hidráulica Computacional - LHC
>         Departamento de Hidráulica e Saneamento - SHS
>         Escola de Engenharia de São Carlos - EESC
>         Universidade de São Paulo - USP
> 
>         http://albatroz.shs.eesc.usp.br
>         +55 16 3373 8270
> 
> 
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