Moving past TCP in the data center, part 1

NFS has switched to TCP since /ages/ ago. However, in the beginning (and for quite a while) NFS ran its RPC protocol over UDP. Just, without any real flow-control, and poor loss handling. TCP provides flow-control and better loss-handling - though, still not great, (because of the impedance mismatch of TCP knowing only about the data as a byte-stream, and not being able to take the app. message boundaries into consideration), as per this talk.