Running your OpenFOAM application on Farber
Using the openmpi-ib.qs
job script template found in /opt/shared/templates/gridengine/openmpi
provides the best performance for a parallel MPI run for OpenFOAM applications. Once you have copied the template for your job script (e.g. qsub_sowfa.qs
), then edit the following for your OpenFOAM application:
- Modify NPROC to select the number of slots (cores).
- Modify the memory specification
-l m_mem_free
according to the instructions if you want to have more than 1GB of memory per slot (core). - Modify the email notification
-m
and-M
according to the instructions if you want email to be sent at the end of the job, if the job is aborted, rescheduled, or suspended. - Setup your environment with your newly built OpenFOAM application by replacing the
vpkg_require openmpi/1.4.4-gcc
with your VALET package name (e.g.sowfa/2.0-OF2.1-gcc
) - Setup the MPI executable and options (arguments) for your OpenFOAM application (e.g.
ABLSolver -parallel > log.ABLSolver.3.${JOB_ID} 2>err.ABLSolver.3
)
Now submit your job script using
qsub qsub_sowfa.qs
There is a 1.5.x Grid Engine integration error when only using OpenFOAM 2.1.1 compiled with
openmpi-1.5.3
which causes the following warning when initiating an MPI run mca: base: component_find: unable to open /opt/shared/openfoam/2.1. 1-gcc/ThirdParty-2.1.1/platforms/linux64Gcc/openmpi-1.5.3/lib/openmpi/mca_plm_rs hd: /opt/shared/openfoam/2.1.1-gcc/ThirdParty-2.1.1/platforms/linux64Gcc/openmpi -1.5.3/lib/openmpi/mca_plm_rshd.so: cannot open shared object file: Permission d enied (ignored)
This is a warning and not an error. Please ignore.