Using parMetis in petsc for ordering

[Dimitri Lecas]

Barry Smith a écrit :
>   Dimitri,
>
>    No, I think this is not the correct way to look at things. Load
> balancing the original matrix is not neccessarily a good thing for
> doing an LU factorization (in fact it is likely just to make the LU
> factorization have much more fill and require much more floating
> operations). 
>
>   Packages like SuperLU_dist and Mumps have their own internal ordering
> routines that are specifically for getting a good ordering for doing
> the parallel LU factorization, you should just have these solvers
> use them (which they do automatically).
>
>    Barry
>
>
> On Thu, 11 Jan 2007, Dimitri Lecas wrote:
>
>   
I'am no longer talking about doing LU factorization. But use iterative 
method for solving a linear system, like bicg. Like in the ex10. In this 
example i don't understand why using MatPartitioning.

-- 
Dimitri Lecas