fdspp is a pre-processor for FDS.
One of the primary purposes is to automatically distribute meshes to MPI process depending on their size. For example, do distribute meshes amongst 4 MPI process run the following:
$ fdspp input.fds new-input.fds --n-mpi-4 # Allocate the meshes
MPI Mesh Allocation
MPI_PROCESS 0: TOTAL: 1476096 [1476096]
MPI_PROCESS 1: TOTAL: 1476096 [1476096]
MPI_PROCESS 2: TOTAL: 1127744 [403200, 201600, 162944, 134400, 128000, 44000, 32000, 21600]
MPI_PROCESS 3: TOTAL: 1139552 [352000, 246400, 172800, 131200, 81472, 59904, 33600, 30800, 16400, 14976]
MPI Cell Count Variation: +/- 13.38
$ mpiexec -np 4 fds new-input.fds # Run the modified input file
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