[petsc-users] ILU MPI

[Jed Brown]

Oliver Browne <oliver.browne at upm.es> writes:

> Hi,
>
> Could someone explain if there is any difference in these two approaches 
> when it comes to MPI. When using ILU and running with;
>
> -sub_pc_type ilu -sub_pc_factor_levels 1 -sub_ksp_type preonly

This is (assuming you didn't change it) block Jacobi with ILU in blocks.

> or using the external package hypre;
>
> -pc_type hypre -pc_hypre_type euclid -pc_hypre_euclid_levels k

This is parallel ILU.  This might be stronger, but also likely more
expensive.
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