Running the Code

**Note: The following example shows how to run real.exe, but is exactly the same for running the wrf.exe program.

On a single processor machine, it is sufficient to type:

./real.exe

On DM (distributed memory) parallel systems, some form of the mpirun command will be needed here. For example, on a Linux cluster, the command to run MPI code, using 4 processors may look like:

mpirun -np 4 real.exe

Or ( where ./machfile contains a list of machine names)

mpirun -np 4 -machinefile ./machfile real.exe

On some IBMs, the command is (for interactive runs):

poe real.exe -rmpool 1 -procs 4

DM Systems There typically is not much benefit from running real.exe as a parallel job, but there is a lot of benefit from running wrf.exe in parallel.

NCAR - Cheyenne Users If you are running in parallel mode, it is mandatory to run jobs by submitting a batch script with PBS. You can read more about this here.