ParMETIS (Parallel Graph Partitioning and Fill-reducing Matrix Ordering) ParMETIS is an MPI-based parallel library that implements a variety of algorithms for partitioning unstructured graphs, meshes, and for computing fill-reducing orderings of sparse matrices. Set precision type: DP=yes (for 64-bit, default is 32-bit) The requirement is a MPI implementation, either mpich or openmpi.