[Beowulf] TOE on Linux?

Gilad Shainer Shainer at mellanox.com
Tue May 20 12:22:38 EDT 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.

Gilad.

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