Hello dear Katherine, On Wednesday 25 October 2006 17:43, Katherine Holcomb wrote: > We currently use MPICH on our Linux clusters, but due to a high > frequency of semaphore problems we are planning to replace it. OpenMPI > looks like our best candidate but we have hit a snag. We support > multiple compilers (specifically PGI and Intel) and due to > incompatibilities in different vendors' f90 .mod files, we have separate > directories for OpenMPI with each compiler. Therefore we cannot set a > global path to the OpenMPI binaries -- it will differ depending on the > user's choice of compiler. I have read about the --prefix flag and this > does work, but our users are mostly barely conversant with Unix and many > would have difficulty finding and specifying the appropriate path. (We > use the modules software environment currently to set paths and the like > for them.) If You use modules already, You can set the path / prefix depending on the compilers to be used. Additionally, You may provide wrappers to mpirun to specify the correct prefix, so that for the user nothing will change, so:
/opt/OpenMPI/bin/... mpi-wrappers calling /opt/OpenMPI/1.1.2-pgi/... /opt/OpenMPI/1.1.2-intel/... We have used this kind of setup before to provide different versions of Open MPI. The next Open MPI-1.2 will provide --enable-orterun-prefix-by-default flag to always have the prefix being passed. Hope, I could help? With best regards, Rainer > Is there some way to specify something like "use the same > path as you are in" from the root process? There was some allusion in > the FAQ to changing the wrappers to include directives, but the link led > to a "no such category" page. -- ---------------------------------------------------------------- Dipl.-Inf. Rainer Keller http://www.hlrs.de/people/keller High Performance Computing Tel: ++49 (0)711-685 6 5858 Center Stuttgart (HLRS) Fax: ++49 (0)711-685 6 5832 POSTAL:Nobelstrasse 19 email: kel...@hlrs.de ACTUAL:Allmandring 30, R.O.030 AIM:rusraink 70550 Stuttgart
