[Wrf-users] WRF running parallel in cluster

Bart Brashers bbrashers at Environcorp.com
Mon Apr 4 09:48:29 MDT 2011

Are you using any queuing system like SGE, Torque, PBS, etc.?  In
OpenMPI, the mpirun (and mpiexec) are really just links to orterun.
Orterun is smart enough to get the list of hostnames to use from the
queuing system.


If you're not using a queuing system, then you need to tell orterun
which machines to use.  There's several ways, see `man orterun`.  You
could do any of these:


# cat hosts.txt





# orterun -np 4 -hostfile hosts.txt wrf.exe

# mpirun -np 4 -machinefile hosts.txt wrf.exe

# orterun -np 4 -host machine1,machine1,machine2,machine2 wrf.exe


Bart Brashers


From: wrf-users-bounces at ucar.edu [mailto:wrf-users-bounces at ucar.edu] On
Behalf Of Ahsan Ali
Sent: Friday, April 01, 2011 8:17 PM
To: wrfhelp
Subject: [Wrf-users] WRF running parallel in cluster




 I want to run WRF on multiple nodes in a linux cluster using openmpi,
giving the command mpirun -np 4 ./wrf.exe just submit it to the single
node . I don't know how to run it on other nodes as well. Help needed.



Syed Ahsan Ali Bokhari 
Electronic Engineer (EE)

Research & Development Division
Pakistan Meteorological Department H-8/4, Islamabad.
Phone # off  +92518358714

Cell # +923155145014


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