22 Dec
2010
22 Dec
'10
6:52 a.m.
......
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 ...
You can try SystemTap: http://sourceware.org/systemtap/
It seems to be roughly analagous to dtrace and is aimed squarly at the linux kernel.