On Tue, 21 Dec 2010, Antonello Piemonte wrote: > To: centos at centos.org > From: Antonello Piemonte <apiemont at googlemail.com> > Subject: [CentOS] I/O size distribution? > > 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 ... This might do it. It's in the updates repo. Name : systemtap Arch : i386 Version : 1.1 Release : 3.el5_5.3 Size : 6.3 M Repo : installed Summary : Instrumentation System URL : http://sourceware.org/systemtap/ License : GPLv2+ Description: SystemTap is an instrumentation system for systems running Linux 2.6. : Developers can write instrumentation to collect data on the operation : of the system. Kind Regards, Keith Roberts -- In theory, theory and practice are the same; in practice they are not. This email was sent from my laptop with Centos 5.5