[Beowulf] compatibility between different versions of mpich

[Patrick Geoffray]

Hi Toon,

Toon Knapen wrote:
> In particular I'm interested if e.g. the mpirun script of version 1.2.7 
> is supposed to be able to launch an application that was compiled with 
> 1.2.5.2.

The mpirun scripts are specific to each device, ie the mpirun.ch_p4 is 
not the same as mpirun.ch_gm or mpirun.ch_mx. As long as you don't use 
an mpirun from a different device, it should be safe ti mismatch 
versions, even more likely between minor versions (1.2.X).

> And what about the mpirun script that comes with mpichgm? What happens 
> if that is being used to launch an application that was linked to (the 
> static library) of an mpich-installation that was configured to use the 
> ch_p4 device?

It won't work, ch_p4 and ch_gm use very different spawning process.

Patrick