[CentOS] I/O size distribution?

Thu Dec 23 07:19:23 UTC 2010
cpolish at surewest.net <cpolish at surewest.net>

Antonello Piemonte wrote:
> Hello
> I have read that under Solaris one can use DTrace to get I/O request
> size distribution on a global scale (also on a per process/pid basis).
> See for example
> http://prefetch.net/articles/observeiodtk.html
> Can anyone recommend an alternative to get similar information under
> CentOS? I looked into dtrace for linux but it seems still work in
> progress, even putting aside CDDL issues ...
> http://www.crisp.demon.co.uk/tools.html

Maybe the average request size from
  iostat -x 
could supply part of the /global/ piece?
Charles Polisher