[mpich-discuss] mpich2-1.4 and mixing 32bit / 64bit LINUX systems

[Dave Goodell]

MPICH2 doesn't really support a heterogeneous scenario like you are describing.  You might have success mixing a 32-bit and a 32-/64-bit bi-arch system that are both using the same distro (e.g., Debian) as long as you build MPICH2 for 32-bit only.  Using two entirely different distributions will probably be extremely difficult to get right, if not impossible.

Our recommendation is always to use the most homogeneous environment possible for your cluster.

-Dave

On Jun 28, 2011, at 3:23 PM CDT, cornelis.broeders at web.de wrote:

> Hello,
> today I could solve the principal ssh-problems with coupling of LINUX computer with Debian Lenny and MANDRIVA-2010 OS with 32 and 64 bit architectures. The recommended test "mpiexec -n 4 -f hosts hostname" works fine on all tested configurations. However, another recommended test "mpiexec -n 4 -f hosts ./examples/cpi" only works if 64bit Debian boxes are connected. Any coupling of the 32bit MANDRIVA2010 system with a 64bit system (Debian or MANDRIVA) fails to complete properly.
> As I did not find information on this issue in a quick google-search, I want to ask the group about this problem. Myself, I did not try to couple mixed 32bit/64bit systems in the past. Many thanks in advance for any response,
> C. Broeders
> --
> C.H.M. Broeders,       http://www.cornelis-broeders.eu
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