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Re: defrag xfs

To: Steve Lord <lord@xxxxxxx>
Subject: Re: defrag xfs
From: Andi Kleen <ak@xxxxxx>
Date: 22 Jan 2005 01:59:40 +0100
Date: Sat, 22 Jan 2005 01:59:40 +0100
Cc: Sonny Rao <sonny@xxxxxxxxxxx>, linux-xfs@xxxxxxxxxxx
In-reply-to: <41F11609.4020907@xfs.org>
References: <F62740B0EFCFC74AA6DCF52CD746242D010337FA@iu-mssg-mbx05.exchange.iu.edu> <41F07494.1060501@xfs.org> <20050121043237.GA28699@kevlar.burdell.org> <1106286413.8580.66.camel@kennedy> <20050121054830.GA29637@kevlar.burdell.org> <m18y6n1ede.fsf@muc.de> <20050121070221.GA30287@kevlar.burdell.org> <41F11609.4020907@xfs.org>
Sender: linux-xfs-bounce@xxxxxxxxxxx
User-agent: Mutt/1.4.1i
> Now, what would be really neat is for a layer underneath the filesystem
> to dynamically detect failing storage (smart?), take some storage from
> a free pool of drives, and remap the filesystem blocks out to the new
> space while it is live.

Aka drivers/md/dm-bbr.c. It's not in mainline (yet?), but somewhere in the 
DM patchkits. However it obviously only works for write errors, to handle
read errors you need a RAID level >0.

-Andi


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