linux-ext4 - Re: [PATCH] ext4: Group meta-data blocks together.

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Message-ID: <20080519095752.GA2762@skywalker>
Date:	Mon, 19 May 2008 15:27:52 +0530
From:	"Aneesh Kumar K.V" <aneesh.kumar@...ux.vnet.ibm.com>
To:	Eric Sandeen <sandeen@...hat.com>
Cc:	cmm@...ibm.com, tytso@....edu, adilger@....com,
	linux-ext4@...r.kernel.org
Subject: Re: [PATCH] ext4: Group meta-data blocks together.

On Thu, May 15, 2008 at 11:14:51AM -0500, Eric Sandeen wrote:
> Aneesh Kumar K.V wrote:
> > On Thu, May 15, 2008 at 09:23:59PM +0530, Aneesh Kumar K.V wrote:
> >> This adds a per inode meta-block prealloc space from which
> >> meta-data block requests are served. This help in making
> >> sure meta-data block are closer. This is needed to speedup
> >> unlink of the file. Any new prealloc space is allocated near
> >> the goal block specified. The goal block is the last block
> >> allocated for the file. So we don't keep the data-block and
> >> meta-data block far apart.
> >>
> > 
> > The result can be found at
> > 
> > http://www.radian.org/~kvaneesh/ext4/meta-group/
> 
> Out of curiosity, do you have graphs similar to
> http://www.radian.org/~kvaneesh/ext4/meta-group/ext4-noextents-metagroup.png
> 
> before and after your change?

http://www.radian.org/~kvaneesh/ext4/meta-group/exp1/

-aneesh
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