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Re^7: MPICH2 version always runs in a single processor (Linux 64-bit)

Miro Moman

For the Debian/Ubuntu users, the Debian way of doing this is:

$sudo update-alternatives NAME

where NAME in this case would be mpi and mpirun, respectively. Choosing mpirun.mpich2 applies to both mpirun and mpiexec.

Then you are presented the alternatives and you can choose the one that better suits your needs.

Apparently, the default is openmpi.

Alternatively, you can stick to the defaults and use the openmpi version of Firefly. Anyone knows if there are significant performance differences between openmpi and mpich2?

On Mon Jun 21 '10 6:13pm, Jim Kress wrote
>You know, if you use MPI-SELECTOR, it automatically makes sure you are set-up to properly use the specific MPI tool you select.  You don't have to put yourself through all this nightmarish BS to get things to work.

>It is unreal to me that so many people refuse to use such a simple tool that can resolve so many headaches ...

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