On Tue, 21 Dec 2010, Antonello Piemonte wrote:
To: centos@xxxxxxxxxx
From: Antonello Piemonte <apiemont@xxxxxxxxxxxxxx>
Subject: 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.
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