> > afaik, RDMA is used by some MPI implementations; > > ... usually only for long messages; pretty much all > non-Ethernet hardware implements some kind of remote DMA for > this purpose. For short messages, it doesn't matter if you > copy the data.
RDMA != zero copy. In some non-Ethernet solutions you can do zero copy with send/receive as well. Beside the usage for large messages, there are other apps that use RDMA to better manage remote data base, one example is creating shared cache. Gilad. _______________________________________________ Beowulf mailing list, Beowulf@beowulf.org To change your subscription (digest mode or unsubscribe) visit http://www.beowulf.org/mailman/listinfo/beowulf
