[petsc-users] sequential partitioning?

Dominik Szczerba dominik at itis.ethz.ch
Sat Oct 22 09:18:18 CDT 2011

Thanks, this I had no chance to know. Is also true for MatPartitioningCreate?
Which one should be run collectively and which one only on master? My
code is along this line:


Many thanks!

On Sat, Oct 22, 2011 at 4:05 PM, Barry Smith <bsmith at mcs.anl.gov> wrote:
>   You need to create the MPIAdj matrix with PETSC_COMM_SELF   not COMM_WORLD
>   Barry
> On Oct 22, 2011, at 8:45 AM, Dominik Szczerba wrote:
>> I do not seem to find any guidance on this subject in the docu.
>> I built petsc with chaco and party to attempt sequential partitioning,
>> where parmetis fails.
>> However, I get the error:
>> [0]PETSC ERROR: No support for this operation for this object type!
>> [0]PETSC ERROR: Distributed matrix format MPIAdj is not supported for
>> sequential partitioners!
>> I do not seem to find a sequential equivalent of MatCreateMPIAdj...
>> Are there any examples how to perform partitioning sequentially?
>> My mesh/graph is located entirely on master.
>> Thanks a lot,
>> Dominik

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