The VecScatter man page says that the default vecscatter type uses PetscSF, and that one can use PetscSF options to control the communication.
PetscSFCreate lists 3 different types, including MPI-3 options. So I’m wondering is it enough to just add, for example, -sf_type neighbor to the list of PETSc options to have all VecScatter calls use MPI 3, and are there advantages to using that over the default options? Thanks, Randy M.
