Hi, I am using Openmpi (version 1.2.2) for MPI data transfer using non-blocking MPI calls like MPI_Isend, MPI_Irecv etc. I am using "--mca btl_tcp_if_include eth0,eth1" to use both the eth link for data transfer within 48 nodes. Now I have added eth2 and eth3 links on the 32 compute nodes. My aim is to share the high speed data within 32 compute nodes through eth2 and eth3. But I can't include this as part of "mca" as the rest of 16 nodes do not have these additional interfaces. In MPI/Openmp can one specify explicit routing table within a set of nodes? Such that I can edit /etc/host for additional hostname with these new interfaces and add these hosts in the mpi hostfile.
Regards, Jayanta
