> On Aug 30, 2020, at 7:33 AM, Mark Adams <mfad...@lbl.gov> wrote: > > > > > So, if ParMETIS gives different edge cut as it is expected, > MatPartitioningGetUseEdgeWeights and MatPartitioningSetUseEdgeWeights works > correctly. Why can't CHACO? > > > Chaco does not support using edge weights.
The package interfaces that do not support edge weights should error if one requests partitioning with edge weights. Not everyone is born with the innate knowledge that the Chaco PETSc interface doesn't support edge weights. > https://gitlab.com/petsc/petsc/-/merge_requests/3119
