> From: Holger Rauch ... > and would like to know why UDP instead of TCP has been chosen as the > transport protocol?
The choice of UDP is historical. I would guess that there were many reasons it was chosen for the original implementation, many of them would no longer apply with today's system implementations, but existed then. The limitations of UDP as used with OpenAFS are understood, and as documented at http://www.openafs.org/pages/roadmap.html RxTCP (a TCP transport for the Rx protocol used) has been on the roadmap for quite some time. Prototype code has been written. A lot of thinking has been done as to how to provide UDP/TCP compatibility on the clients and servers (not all would be able to change at the same time). A lot more needs to be done for the work to be completed (and last I recall there were some dependencies on other items on the roadmap). I believe the effort levels for RxTCP have been consistently estimated as being around two person years.
