From: Andreas Dilger <adilger@clusterfs.com>
To: Dominik Kubla <kubla@sciobyte.de>
Cc: "Albert D. Cahalan" <acahalan@cs.uml.edu>,
"Alexis S. L. Carvalho" <alexis@cecm.usp.br>,
linux-kernel@vger.kernel.org
Subject: Re: implementing soft-updates
Date: Wed, 10 Apr 2002 12:13:04 -0600 [thread overview]
Message-ID: <20020410181304.GA3509@turbolinux.com> (raw)
In-Reply-To: <20020409184605.A13621@cecm.usp.br> <200204100041.g3A0fSj00928@saturn.cs.uml.edu> <20020410092807.GA4015@duron.intern.kubla.de>
On Apr 10, 2002 11:28 +0200, Dominik Kubla wrote:
> try to implement the snapshot capability for ext2/ext3. Everyone of us
> who has to do live backups of production systems will thank you if you
> get that development started.
LVM can already do snapshots at the device level. It integrates with
ext3/XFS/reiserfs via sync_super_lockfs/unlockfs so that what is in
the snapshot is a consistent, clean filesystem.
There might need to be a little touchup with ext2 to support these
calls, but even in the current state you get a usable filesystem
snapshot, with the exception that the filesystem has not been marked
clean.
As for a filesystem-level ext2/ext3 snapshot, this has also already
been done (sf.net/projects/snapfs). The people who took over that
project have removed all of the released files and CVS, but you can
still get the CVS from the sourceforge CVS backups. I also have a
version here, but don't have any time to work on it.
Cheers, Andreas
--
Andreas Dilger
http://www-mddsp.enel.ucalgary.ca/People/adilger/
http://sourceforge.net/projects/ext2resize/
next prev parent reply other threads:[~2002-04-10 18:15 UTC|newest]
Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top
2002-04-09 21:46 implementing soft-updates Alexis S. L. Carvalho
2002-04-09 22:17 ` Mike Fedyk
2002-04-09 22:23 ` Dominik Kubla
2002-04-09 23:36 ` Mike Fedyk
2002-04-10 0:41 ` Albert D. Cahalan
2002-04-10 1:58 ` Alexis S. L. Carvalho
2002-04-10 3:46 ` Andreas Dilger
2002-04-10 2:55 ` Andreas Dilger
2002-04-10 11:48 ` Peter Wächtler
2002-04-11 12:45 ` Bill Davidsen
2002-04-10 9:28 ` Dominik Kubla
2002-04-10 18:07 ` Albert D. Cahalan
2002-04-08 20:34 ` Pavel Machek
2002-04-10 18:13 ` Andreas Dilger [this message]
[not found] <20020409184605.A13621@cecm.usp.br.suse.lists.linux.kernel>
[not found] ` <200204100041.g3A0fSj00928@saturn.cs.uml.edu.suse.lists.linux.kernel>
[not found] ` <20020410092807.GA4015@duron.intern.kubla.de.suse.lists.linux.kernel>
2002-04-10 19:24 ` Andi Kleen
2002-04-08 20:35 ` Pavel Machek
2002-04-15 20:25 ` Andi Kleen
2002-04-15 20:47 ` Andreas Dilger
2002-04-16 10:45 ` Wichert Akkerman
2002-04-16 18:55 ` Mike Fedyk
-- strict thread matches above, loose matches on Subject: below --
2002-04-11 16:35 James Bottomley
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