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Top Forums UNIX for Advanced & Expert Users How to reduce IOWAIT in linux Post 302127125 by sysgate on Monday 16th of July 2007 09:27:36 AM
Old 07-16-2007
Another tool that will suggest good options is "iozone - filesystem benchmark tool".
 

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bench(1)						      General Commands Manual							  bench(1)

NAME
bench - http benchmark SYNOPSIS
bench [-n requests] [-c concurrency] [-t timeout] [-k] [-K count] [-C cookie-file] [http://]host[:port]/uri DESCRIPTION
bench is a HTTP benchmark program that can fetch the same URL over and over again, or fetch several URLs (coming in from stdin). If you specify a URL on the command line, this URL will be fetch many times (specify with -n, default: 10000) with several connections open in parallen (specify with -c, default: 10). You can specify a timeout (per request) in seconds with -t. The -k switch activates keep-alive mode. In keep-alive mode, the TCP connection is not closed between requests. You also have to specify how many HTTP requests can go over one TCP connection with -K. bench can also send one HTTP cookie per connection, as specified using a cookie file. The cookie file is read line by line, and each request gets the next line inserted into it. So each line should look something like this: Cookie: foo=bar If the end of the file is reached, bench restarts it at the beginning. AUTHOR
Initially written by Felix von Leitner <felix-gatling@fefe.de>. LICENSE
GPLv2 (see http://www.gnu.org/copyleft/gpl.html) bench(1)
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