linux-ext4 - Re: ext2/3/4 online defrag

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Message-ID: <20070510052409.GB6375@schatzie.adilger.int>
Date:	Wed, 9 May 2007 22:24:09 -0700
From:	Andreas Dilger <adilger@...sterfs.com>
To:	Eric <erpo41@...il.com>
Cc:	linux-ext4@...r.kernel.org
Subject: Re: ext2/3/4 online defrag

On May 09, 2007  21:19 -0700, Eric wrote:
> 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.

Yes, old and dangerous.

> *Some patches exist that provide preliminary support for online defrag
> in the ext3 driver, but interest in improving/integrating these patches
> is low.

I don't think that is true.  Takashi Sato is actively working on online
defrag, and patches are posted regularly to the linux-ext4 mailing list.

I'd recommend that any work being done be spent in improving those
patches instead of starting from scratch.

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

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