SV: Subject: Parallel petsc with external UMFPACK

["Lars Rindorf" <Lars.Rindorf@xxxxxxxxxxxxxx>]

Hi Satish

I'm sorry. My text should have read, that UMFPACK is listed as not available in parallel. My fault.

MUMPS sounds very interesting being a multifrontal solver. I'll try it out. Thanks!

KR, Lars

-----Oprindelig meddelelse-----
Fra: owner-petsc-users@xxxxxxxxxxx [mailto:owner-petsc-users@xxxxxxxxxxx] På vegne af Satish Balay
Sendt: 13. maj 2008 18:07
Til: petsc-users@xxxxxxxxxxx
Emne: Re: Subject: Parallel petsc with external UMFPACK

> From: "Lars Rindorf" <Lars.Rindorf@xxxxxxxxxxxxxx>
> To: <petsc-users@xxxxxxxxxxx>

> I'm thinking about using petsc to solve a linear system (Ax=b) using 
> parallelization on a couple of linux computers. It is very important 
> for my system (electromagnetics) to use a direct solver, such as UMFPACK.
> Iterative solvers perform very poorly.
> 
> My question is:  I can see that UMFPACK is not listed 
> (http://www-unix.mcs.anl.gov/petsc/petsc-2/documentation/linearsolvert
> ab
> le.html) on the petsc page. Are there any plans to expand petsc to 
> also include petsc?

Its listed there. However it says parallel/complex support is not available.

However - if you need a parallel direct solver - you might explore MUMPS. The other alternatives are SuperLU_DIST, spooles.

Satish

> The UMFPACK homepage says that there exist a parallization for UMFPACK 
> by Steve Hadfield. Can his parallelization be used with petsc?
> 
> I must add, that although I like numerics and maths I do not intend to 
> program 'from scratch'.
> 
> Kind regards
> Lars Rindorf