Of course, by this you mean, with the same total number of nodes, for e.g. 64 process on 1 node using shared mem, vs 64 processes spread over 2 nodes (32 each for e.g.)?
On 29 October 2013 14:37, Ralph Castain <r...@open-mpi.org> wrote: > As someone previously noted, apps will always run slower on multiple nodes > vs everything on a single node due to the shared memory vs IB differences. > Nothing you can do about that one. >
