Hi, We have an in-house application where we run two solvers in a loosely coupled manner: The first solver runs a timestep, then the second solver does work on the same timestep, etc. As the two solvers never execute at the same time, we would like to run the two solvers in the same allocation (launching mpirun once for each of them). RAM is not an issue, so there should not be any risk of excessive swapping degrading performance.
We use openmpi-1.4.5 compiled with torque integration. The torque integration means we do not give a hostfile to mpirun, it will itself query torque for the allocation info. Question: Can we force one of the solvers to run in a *subset* of the full allocation? How do we do that? I read in the FAQ that providing a hostfile to mpirun in this case (when it's not needed due to torque integration) would cause a lot of problems... Thanks in advance, Ola
