openmpi/INSTALL

Execute the following instructions to install the Open MPI system from within the directory at the top of the tree:

./autogen.sh (if this fails read the HACKING file)
./configure --prefix=/where/to/install
make install

To run an MPI program:

mpicc your-code.c

In order to run the program, you need to set some envs (use export for bash etc)

setenv MCA_common_ompi_cofs_job_handle pcm-cofs-job-handle
setenv MCA_common_ompi_cofs_comm_dir "/tmp/COFS"
setenv MCA_OOB_BASE_VPID 0
setenv MCA_REGISTRY_BASE_VPID 0


Then if you need to run say N nodes you need to set
setenv MCA_common_ompi_cofs_num_procs N

Then in the shell for each you would set

setenv MCA_common_ompi_cofs_my_vpid MYRANK

where MYRANK is 0 in one, 1 in the next etc

This rather cumbersome process will be replaced soon (we promise).

This is the world's greatest MPI, version 10.0a1r975.