From: "Amir G." Subject: Re: LVM vs. Ext4 snapshots (was: [PATCH v1 00/30] Ext4 snapshots) Date: Sat, 11 Jun 2011 12:44:16 +0300 Message-ID: References: <20110610101142.GA10144@ubuntu> <20110610150129.GA17585@ubuntu> <20110611074908.GC2517@ubuntu> <843433D5F73C864182AC91B8@nimrod.local> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Cc: Joe Thornber , Lukas Czerner , Mike Snitzer , linux-ext4@vger.kernel.org, tytso@mit.edu, linux-kernel@vger.kernel.org, lvm-devel@redhat.com, linux-fsdevel To: Alex Bligh Return-path: In-Reply-To: <843433D5F73C864182AC91B8@nimrod.local> Sender: linux-kernel-owner@vger.kernel.org List-Id: linux-ext4.vger.kernel.org On Sat, Jun 11, 2011 at 11:18 AM, Alex Bligh wrote: > > > --On 11 June 2011 08:49:08 +0100 Joe Thornber wrote: > >> I am also convinced multisnap wont be suitable for every use case. > > I'm surprised by one thing ext 4 snapshots doesn't seem to do: I would have > thought the "killer feature" for doing snapshots in the fs rather than in > the block layer would be the ability to snapshot - and more importantly > roll back - only parts of the directory hierarchy. > > (I've only read the URLs Amir sent, so apologies if I've missed this) > No need for apologies. There is no per-directory snapshot nor rollback with ext4 snpshots. It is possible to configure a part of the directory hierarchy to be excluded from future snapshots, but not to delete it selectively from past snapshots. Amir.