NFS Performance Tuning for HP-UX 11.0 and 11i Systems

nfs performance tuning for hp-ux 11.0 and 11i systems page 101

Notes:

Page 101July 22, 2002

nfs/udp

vs.

nfs/tcp

Which protocol should you use?

TCP

Local Area Network with a HIGH Number of

Retransmissions and Timeouts

TCP

Local Area Network with Network Switch UDP

Buffers Overflowing

TCPHigh Latency Links or Wide Area Networks

UDP

Local Area Network with a SMALL Number of

Retransmissions and Timeouts

Traditionally the decision to use UDP or TCP was based solely on geography (i.e.

LAN=UDP, WAN=TCP). However, there are situations where even a LAN

environment could benefit from TCP.

As with most every performance-related recommendation, your mileage may vary.

Even in the scenarios listed above, where one protocol would seem to have a clear

advantage over the other, there is no guarantee that the recommendation will hold

true in every environment. If possible, both protocols should be tested and

evaluated before making a final decision.