linux-ext4 - Re: Initial results of FLEX

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Message-ID: <20070711124110.GZ6417@schatzie.adilger.int>
Date:	Wed, 11 Jul 2007 06:41:10 -0600
From:	Andreas Dilger <adilger@...sterfs.com>
To:	"Jose R. Santos" <jrs@...ibm.com>
Cc:	"linux-ext4@...r.kernel.org" <linux-ext4@...r.kernel.org>
Subject: Re: Initial results of FLEX_BG feature.

On Jul 11, 2007  00:30 -0500, 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?

I don't have a URL, but if you search for "IRON ext3" and go to Remzi's
site it is called "Analysis and Evolution of Journaling File Systems".

Cheers, Andreas
--
Andreas Dilger
Principal Software Engineer
Cluster File Systems, Inc.

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