[Beowulf] TOE on Linux?
Shainer at mellanox.com
Tue May 20 09:22:38 PDT 2008
> > 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.
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