[petsc-users] matrix distribution

[Jed Brown]

Panruo Wu <armiuswu at gmail.com> writes:

> Hello,
>
> I have a question about the matrix distribution in Petsc.
> Can I define the distribution pattern as the output
> of graph partition software like METIS? Pointers
> to documentation/code about matrix distribution in Petsc
> would be very helpful.

http://www.mcs.anl.gov/petsc/petsc-current/docs/manualpages/Mat/MatCreateMPIAdj.html
http://www.mcs.anl.gov/petsc/petsc-current/docs/manualpages/MatOrderings/MatPartitioningCreate.html

After applying the partitioning, relabel your mesh (or whatever is the
source of your problem), migrate that data, and create a new matrix
using the new distribution.