[petsc-users] How to reorder the local part of the parallel mat?

[Barry Smith]

On Jan 16, 2013, at 1:53 PM, Fande Kong <fd.kong at siat.ac.cn> wrote:

> Hi all,
> 
> I create a parallel mat with type MATMPIAIJ, and use the MatGetOrdering to reorder it. But it doesn't work. Who can tell me how to do that? I just want to reorder the local part of the matrix.

   We don't have code in place for this type of thing. Maybe if you explain why you would like it we could suggest alternatives. 

    Generally we recommend ordering the original mesh appropriately so that the resulting matrices have good orderings and don't recommend reordering the matrices directly (except for direct solvers).

   Barry

> 
> Thanks,
> 
> -- 
> Fande Kong
> ShenZhen Institutes of Advanced Technology
> Chinese Academy of Sciences