On 03/03/2014 06:06 PM, Reuti wrote:

Am 03.03.2014 um 23:54 schrieb Gus Correa:

...

OpenMPI allows you to choose the interface that it will use, so you can direct it to your very-local subnet:

http://www.open-mpi.org/faq/?category=tcp#tcp-selection

MPICH:

http://wiki.mpich.org/mpich/index.php/Using_the_Hydra_Process_Manager#Hydra_...

It should work for other Ethernet interfaces too.

Nevertheless: in any case it might be easier for the applications to use the primary interface solely for MPI, and any other one for the external access (this is usually my setup, as I don't have to provide the assignment of other interfaces this way).

-- Reuti

Oops! Apologies for the not so polite reference to another MPI implementation. I must have be missing some sleep. As Reuti points out, you can do the same with MPICH as well. Gus Correa