[petsc-users] question about partitioning usage

[Dominik Szczerba]

I recently realized that, independently of my explicitly partitioning
the input mesh, Petsc also employs partitioning somewhere internally.
Is my understanding correct then:

* parmetis is the default even when other partitioners were configured
* for MPIAIJ matrices the employed partitioner must be parallel, e.g.,
parmetis or ptscotch and not sequential, e.g. chaco or party.

Thanks for any clarifications.

PS. I can not configure petsc with --download-ptscotch on any of my
systems, will send configure.log's soon.

Dominik