FAIL_ON_ERROR=${FAIL_ON_ERROR:-true}
MPIRUN=${MPIRUN:-$(which mpirun 2>/dev/null || true)}
+MPIRUN_OPTIONS=${MPIRUN_OPTIONS:-"--oversubscribe"}
MPI_USER=${MPI_USER:-mpiuser}
SHARED_DIR_LOGS=${SHARED_DIR_LOGS:-""}
MACHINEFILE_OPTION=${MACHINEFILE_OPTION:-"-machinefile"}