Hi all, I am trying to try something. I am using the same MatPartitioning codes for both CHACO and ParMETIS:
ierr = MatConvert(SymmA,MATMPIADJ,MAT_INITIAL_MATRIX,&AL);CHKERRQ(ierr); ierr = MatPartitioningCreate(MPI_COMM_WORLD,&part);CHKERRQ(ierr); ierr = MatPartitioningSetAdjacency(part,AL);CHKERRQ(ierr); ierr = MatPartitioningSetFromOptions(part);CHKERRQ(ierr); ierr = MatPartitioningApply(part,&partitioning);CHKERRQ(ierr); After obtaining the IS, I apply this to my original nonsymmetric matrix and try to get an approximate edge cut. Except for 1 partitioning, my program completely works for 2,4 and 16 partitionings. However, for 1, ParMETIS gives results where CHACO I guess doesn't since I am getting errors about the index set. What is the difference between CHACO and ParMETIS that one works for 1 partitioning and one doesn't? Thanks! Eda
