[petsc-users] MPI partitioning

[Barry Smith]

On Apr 4, 2013, at 1:18 PM, Alexander Goncharov <alexvg77 at gmail.com> wrote:

> Dear Petsc users,
> 
> I have a question regarding FEM mesh partitioning.
> 
> When I create MPI partioning using MPIAdj matrix do I need to optimize FEM bandwidth using MatGetOrdering before calling MatPartitioningCreate function?

  No, you do not want to do that.
> 
> Thank you in advance!

  After you have determined the partitioning you may want to renumber on each process to reduce FEM bandwidth (note this reordering is sequential and just for the local nodes/elements on each process.)

   Barry