When you need to make a new mpas*.part.N file because you changed the number of nodes an MPAS component runs on.
Step-by-step guide
- See if "metis" or "gpmetis" is available on your platform and add it to your path.
- Find the base mpas graph file called "mpas-cice.graph.info.151020" or "mpas-o.graph.info.151031". These files should be in inputdata/ice/mpas-cice and inputdata/ocn/mpas-ocn respectively.
- Run the metis command with the last argument being the number of nodes for the partition.
- Example: "gpmetis mpas-cice.graph.info.151010 120" will generate a *.part.120 file for mpas-cice.
- Place the new file in the correct inputdata subdirectory for the model to find it.