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Operating Systems AIX AIX 5.2 5.3 disk performance exerciser tool Post 302269588 by zaxxon on Thursday 18th of December 2008 05:11:53 AM
Old 12-18-2008
Have a look at ndisk in this link maybe:
IBM developerWorks: Wikis - AIX - nstress

Also if you try to simulate I/O traffic on disk with such a tool, it will not necessary be the same kind of traffic like you have in your production environment. It might me just ok to see what max bandwith and number of I/O transactions will be ok for it.

For analyzing your actual performance problem on disks, you should investigate more on your systems where these occure.
If you need help, let us know. Without investigation it could be something different than it looks at first.
 

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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)
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