:orphan: How to define an alternative MPI launcher ----------------------------------------- The pam script by default launches MPI runs with mpirun. If you cannot use mpirun because you are on a system which does not support it or which offers alternative MPI launchers (SGI, Cray), you can define your own DIRAC_MPI_COMMAND like this:: $ export DIRAC_MPI_COMMAND="mpirun -np 8" $ export DIRAC_MPI_COMMAND="mpprun" $ export DIRAC_MPI_COMMAND="aprun -n 24" This will then launch:: $DIRAC_MPI_COMMAND dirac.x instead of:: mpirun -np N dirac.x Note that ``--mpi`` overrides DIRAC_MPI_COMMAND.