[petsc-users] matrix distribution

[Panruo Wu]

Thanks Jed!

I understand that MatCreateMPIAdj  takes  adjacency information
and partition the matrix for me; what if I don't want it to partition
for me, that I already have a particular partitioning?

I guess my question is, how do I tell Petsc to use my own partitioning?

Thanks,
Panruo


On Sun, Apr 28, 2013 at 5:26 AM, Jed Brown <jedbrown at mcs.anl.gov> wrote:

> 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.
>
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