How to switch MPI versions on the Gross cluster
The first thing to do is set it on the frontend system by running the command below.
[you@frontend ~] mpi-selector-menu
It will come back with a menu that looks like this.
Current system default: mvapich_gcc44-1.2.0 Current user default: <none> "u" and "s" modifiers can be added to numeric and "U" commands to specify "user" or "system-wide". 1. mvapich2_gcc-1.4.1 2. mvapich2_gcc44-1.4.1 3. mvapich2_pgi-1.4.1 4. mvapich_gcc-1.2.0 5. mvapich_gcc44-1.2.0 6. mvapich_pgi-1.2.0 7. openmpi_gcc-1.4.1 8. openmpi_gcc44-1.4.1 9. openmpi_pgi-1.4.1 U. Unset default Q. Quit Selection (1-9[us], U[us], Q):
Then select the mpi version you want to run on the system. When you select the version you want hit enter and it will ask you
Operator on the per-user or system-wide default (u/s)?
If you are not an administrator you have to choose user. When you set it it will ask you
Defaults already exist; overwrite them? (y/N)
Then quit out of the mpi-selector-menu. Now you need to log out and log back in again for the setting to become effective..