linux-ext4 - Re: Initial results of FLEX

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Date:	Wed, 11 Jul 2007 00:39:46 -0500
From:	Eric Sandeen <sandeen@...hat.com>
To:	"Jose R. Santos" <jrs@...ibm.com>
CC:	Andreas Dilger <adilger@...sterfs.com>,
	"linux-ext4@...r.kernel.org" <linux-ext4@...r.kernel.org>
Subject: Re: Initial results of FLEX_BG feature.

Jose R. Santos wrote:
> On Tue, 10 Jul 2007 22:12:14 -0600
> Andreas Dilger <adilger@...sterfs.com> wrote:

...

>  
>> You might also want to test out placement of the journal in the middle
>> of the filesystem, the U. Wisconsin folks tested this in one of their
>> papers and showed some noticable improvements.  That isn't exactly
>> related, but it is a relatively simple tweak to mke2fs/tune2fs to give
>> it an allocation goal of group_desc[s_groups_count / 2].bg_inode_table
>> (to put it past inode table in middle group).
> 
> Make sense.  Do you have a link to the paper?

filesystem shrinking would need to be fixed to handle this too, right...

-Eric
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