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

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Message-ID: <482C617B.8090909@redhat.com>
Date:	Thu, 15 May 2008 11:14:51 -0500
From:	Eric Sandeen <sandeen@...hat.com>
To:	"Aneesh Kumar K.V" <aneesh.kumar@...ux.vnet.ibm.com>
CC:	cmm@...ibm.com, tytso@....edu, adilger@....com,
	linux-ext4@...r.kernel.org
Subject: Re: [PATCH] ext4: Group meta-data blocks together.

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?

Thanks,
-Eric

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