[ofa-general] Are Memory Locations Accessed via RDMA Cached?

[Roland Dreier]

 > Does RDMA have support for memory caching?  So if one node accesses the
 > memory of another, and the contents haven't changed, does it have to go out
 > onto the network to get all the data again?

There is no cache coherence protocol, and all RDMA operations are
explicitly requested by the application -- so, in short, if you request
an RDMA operation it will always be performed, even if data has not
changed.

 - R.