linux-kernel - Re: statistics of filesystem-journal usage

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Message-Id: <1178893466.6016.5.camel@garfield>
Date:	Fri, 11 May 2007 19:54:26 +0530
From:	Kalpak Shah <kalpak@...syssoft.com>
To:	Folkert van Heusden <folkert@...heusden.com>
Cc:	linux-kernel@...r.kernel.org
Subject: Re: statistics of filesystem-journal usage

On Fri, 2007-05-11 at 16:00 +0200, Folkert van Heusden wrote:
> Hi,
> 
> Maybe it is a nice idea to export statistics on the usage of a journal
> of a filesystem as well. That way one can more easy see if it would help
> to put a journal on an other harddisk.

There is a patch posted on linux-ext4 which maintains the journal
statistics such as transaction sizes and their lifetimes. These stats
are provided through procfs and can only be used with ext4 since ext2/3
still use the jbd layer.

You can see the patch here:
http://lists.openwall.net/linux-ext4/2007/04/02/6

- Kalpak.
> 
> 
> Folkert van Heusden
> 

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