04-03-2003
First, I make sure that the network is the bottleneck. Once I'm sure that it is, I complain to the network people. They take it from there.
Sometimes I have to work with them. And I do need to be sure that the host is talking correctly to its link partner. If a network card is in half-duplex mode, while the port is in full-duplex mode then network performance will suffer severely and at least half of that problem is mine.
But you need to understand that the network is not my responsibility. I am part of a team that administers some things that connect to it.
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LEARN ABOUT CENTOS
varnetload
varnetload(8) Tool to create reproducable network traffic varnetload(8)
NAME
varnetload - tool to create reproducable network traffic
SYNOPSIS
varnetload [-d delay] [-t time to run] [-u url]
DESCRIPTION
varnetload is a simple python script to create reproducable sustained network traffic.
In order to use it effectively, you need to have an HTTP server present in your local LAN where you can put files. Upload a large HTML (or
any other kind of file) to the HTTP server. Use the -u option of the script to point to that URL. Play with the delay option to vary the
load put on your network.
delay Sets delay between individual downloads in miliseconds. Default value is 1000. But you my find values range from 0 to 500 more use-
ful.
time to run
Sets total run time in seconds. Default value is 60.
url Sets downloaded resource. Default is http://myhost.mydomain/index.html.
SEE ALSO
tuned(8) diskdevstat(8) netdevstat(8) scomes(8)
AUTHOR
Written by Phil Knirsch <pknirsch@redhat.com>.
REPORTING BUGS
Report bugs to <pknirsch@redhat.com>.
Phil Knirsch 13 Jan 2011 varnetload(8)