Sending 3MB (2MB send and 1MB reply) of data between two HP-UX workstations using TCP sockets takes about 70 seconds.
While sending the same amount of data between the same workstations using Rendezvous (a software message bus product) takes about 30 seconds.
1) Could anyone explain the performance difference? As far as I know, a Rendezvous client first sends the message through TCP socket to the Rendezvous daemon on the same host, and this daemon broadcasts this message through UDP socket to the daemon on the other host, and that daemon finally sends this message to the server on its same host. The reply message goes through the reverse route.
2) Is UDP socket more than twice faster than TCP socket? otherwise how could it easily offset the extra two hops the
message has to travel?
3) Is there anyway to tune the TCP sockets performance? 4) Could Rendezvous use some special technique to optimize socket performance?
Thanks a lot for your help in answering these questions.