linux-ext4 - ext2/3/4 online defrag

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Date:	Wed, 09 May 2007 21:19:59 -0700
From:	Eric <erpo41@...il.com>
To:	linux-ext4@...r.kernel.org
Subject: ext2/3/4 online defrag

Hi all,

This is my first post to the list. I want to add online defrag support
to ext2/3/4 just to scratch an itch.

I've searched the archives and googled around, and I've come to the
following conclusions:
*An offline defrag tool is available but dangerous.
*Some patches exist that provide preliminary support for online defrag
in the ext3 driver, but interest in improving/integrating these patches
is low.
*An implementation of an ext* filesystem driver can work with any
ext2/3/4 filesystem as long as it supports the necessary revision
(GOOD_OLD_REV or DYNAMIC_REV) and feature flags set in the filesystem.

Please let me know if any of my assumptions are incorrect.

Thanks,

Eric Anopolsky

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