[CentOS] I/O size distribution?

Keith Roberts keith at karsites.net
Wed Dec 22 22:05:49 UTC 2010


On Wed, 22 Dec 2010, Antonello Piemonte wrote:

> To: CentOS mailing list <centos at centos.org>
> From: Antonello Piemonte <apiemont at googlemail.com>
> Subject: Re: [CentOS] I/O size distribution?
> 
> Thanks for all the suggestions.
>
> I had a look at systemtap but I have the feeling that in it's current
> state it is aimed more at kernel developers rather than average admins
> like me :-)
>
> Still, I'll keep an eye on it also give the fact that there seem to be
> now new documentation being written about it
>
> http://docs.redhat.com/docs/en-US/Red_Hat_Enterprise_Linux/5/pdf/SystemTap_Beginners_Guide/SystemTap_Beginners_Guide.pdf
>
> On the other end, I have discovered blktrace and related tools, and
> this seems more palatable to me (subjective, I know ...). This example
> in particular seems to work for me
>
> # blktrace /dev/sda -a issue -a complete -w 60 -o - | blkiomon -I 4 -h -
>
> thought to share in case anyone finds it useful.

Can I use this to monitor which files are being written to 
disk?

Keith

-- 
In theory, theory and practice are the same;
in practice they are not.

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