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

nfs performance tuning for hp-ux 11.0 and 11i systems page 8
Notes:
Page 8July 22, 2002
Copyright 2002 Hewlett- Packard Company
ttcp
The above ttcp output shows this NFS server can send
80MB of TCP/IP data to the client’s discard port (9) in
1.35 seconds (approximately ~59MB/sec).
network
ttcp is a simple, lightweight program that measures the throughput of any network
connection without relying on the filesystem layer. It can generate either UDP or
TCP traffic, and it can be configured to send small or large sized packets to
simulate the behavior of different applications.
Mike Muuss (the author of the “ping” command) and Terry Slattery, of the US Army
Ballistics Research Lab (BRL), developed the ttcp (Test TCP Connection) program in
the early 1980’s. The program now resides in the public domain and is freely
available to download from http://ftp.arl.mil/ftp/pub/ttcp. Also available
from this site is a man page for the ttcp program, which documents the many
available command-line arguments.
It is important to measure the network throughput going in both directions (i.e.
client to server, server to client) to make sure that the bi-directional performance is
comparable.
The ttcp results should not be misinterpreted as potential NFS throughput values.
They merely illustrate the capabilities of the specific network link being tested.