[petsc-users] Parallel LU decomposition

[Jed Brown]

On Tue, 1 Jun 2010 00:11:41 +0800, "Gong Ding" <gdiso at ustc.edu> wrote:
> Dear all,
> I need to solve Poisson's equation many times with same Matrix A and different RHS b.
> The most efficient way is do pre-factorization I think.
> 
> For serial problem, the PCLU seems work as I want to. 
> However, how to do for parallel situation? 
> Should I use an external LU solver such as superlu_dist?

Sure, or MUMPS or PaStiX.  As the problem size gets bigger, eventually a
multigrid will beat even the triangular solves.

Jed