>> I recently realized that, independently of my explicitly partitioning >> the input mesh, Petsc also employs partitioning somewhere internally. > > > We don't unless you tell us to.
Can you please expand? I am partitioning my input unstructured mesh to distribute dofs throughout the processes, and then I am setting up my MPI matricess "as usual", not intending any calls to parmetis or other partitioning functions... So where can I tell or not tell Petsc to use partitioning here or not? Many thanks Dominik
