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Date: Thu, 17 May 2007 18:11:19 +0200 From: Jan Kara <jack@...e.cz> To: Eric <erpo41@...il.com> Cc: linux-ext4@...r.kernel.org Subject: Re: ext2/3/4 online defrag Hello, Sorry for replying a bit late... > 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. For original e2defrag - yes. But me (and several other people independently as I've learnt recently) have written some tools which should result in something useful. If you're interested, you can join prefetch-devel@...glegroups.com - it's led by one guy who is doing defrag and stuff as his google summer of code project. > *Some patches exist that provide preliminary support for online defrag > in the ext3 driver, but interest in improving/integrating these patches > is low. The code itself for ext3 is not a big deal. Main problem are kernel interfaces and I hope to find some time soon to put together some reasonable proposal for reasonably generic calls... > *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. Not sure what you mean here... Honza -- Jan Kara <jack@...e.cz> SuSE CR Labs - To unsubscribe from this list: send the line "unsubscribe linux-ext4" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
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