Jeff,
Did IWG say anything about there being a chip set issue? Example what
if a vender, say Sun, wraps Mellanox chips and on its own HCAs, would
Mellanox HCA and Sun HCA work together?
-DON
On 01/26/09 14:19, Jeff Squyres wrote:
The Interop Working Group (IWG) of the OpenFabrics Alliance asked me
to bring a question to the Open MPI user and developer communities: is
anyone interested in having a single MPI job span HCAs or RNICs from
multiple vendors? (pardon the cross-posting, but I did want to ask
each group separately -- because the answers may be different)
The interop testing lab at the University of New Hampshire
(http://www.iol.unh.edu/services/testing/ofa/) discovered that most
(all?) MPI implementations fail when having a single MPI job span HCAs
from multiple vendors and/or span RNICs from multiple vendors. I
don't remember the exact details (and they may not be public, anyway),
but I'm pretty sure that OMPI failed when used with QLogic and
Mellanox HCAs in a single MPI job. This is fairly unsurprising, given
how we tune Open MPI's use of OpenFabrics-capable hardware based on
our .ini file.
So my question is: does anyone want/need to support jobs that span
HCAs from multiple vendors and/or RNICs from multiple vendors?
