[R-sig-hpc] RScaLAPACK with OpenMPI

Dirk Eddelbuettel edd at debian.org
Wed Jul 1 20:22:42 CEST 2009

Hi Michela,

Sorry for replying sooner, this fell to the wayside.  I'll pick this one
rather than your post on r-help as this is probably the better forum.

On 29 May 2009 at 08:51, Michela Cameletti wrote:
| I'm using RScalapack library for parallelizing some heavy matrix  
| operations required by MCMC methods for spatio-temporal models. The  
| package reference manuals (dated 2005) states that the library needs  
| LamMPI to work but we have a Linux Cluster with OpenMPI. We have found  
| (http://cvs.fedoraproject.org/viewvc/devel/R-RScaLAPACK/) a patch for  
| OpenMPI but we are wondering if in the meanwhile the package has been  
| compiled also for OpenMPI. Does anybody use RScalapack and has any  
| suggestions?

Debian has had Scalapack for years, but is was also built against the wrong
or inconvenient libraries.   I'd be in favour of giving this a shot -- it is
obviously the next step up from "just" using something like multithreaded
blas on a single machine.

That said, it also appears to be somewhat involved to get it all going: You
may well be almost on your own.  Then again, whenever I had questions or
buglets with Open MPI I have found that community to be most helpful.  So if
you have the energy give it a go and folks here, myself included, may get a
chance to help.

Also, did you talk to RScaLAPACK's maintainers at all?  They should probably
have an interest in moving from LAM to Open MPI as well.

Regards, Dirk

Three out of two people have difficulties with fractions.

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