From mboxrd@z Thu Jan 1 00:00:00 1970 From: Fabio Fantoni Subject: Re: [RFC V10 0/4] domain snapshot document Date: Fri, 30 Jan 2015 15:01:11 +0100 Message-ID: <54CB8EA7.6020906@m2r.biz> References: <1422242713-3744-1-git-send-email-cyliu@suse.com> <1422549403.9888.3.camel@citrix.com> <20150130133807.GE6334@zion.uk.xensource.com> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii"; Format="flowed" Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <20150130133807.GE6334@zion.uk.xensource.com> List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Sender: xen-devel-bounces@lists.xen.org Errors-To: xen-devel-bounces@lists.xen.org To: Wei Liu , Ian Campbell Cc: Dave Scott , ian.jackson@eu.citrix.com, Chunyan Liu , xen-devel@lists.xen.org, jfehlig@suse.com, Euan Harris List-Id: xen-devel@lists.xenproject.org Il 30/01/2015 14:38, Wei Liu ha scritto: > On Thu, Jan 29, 2015 at 04:36:43PM +0000, Ian Campbell wrote: >> On Mon, 2015-01-26 at 11:25 +0800, Chunyan Liu wrote: >>> Changes to V9: >> This looks good to me, thanks. >> >> Ian/Wei do you have any comments? xapi folks? >> > Looks good to me. > > Wei. I looked to the project of domain snapshot and seems good. I have only a question. I saw this: > Disk snapshot can be created by many external tools, like qemu-img, > vhd-util and lvm, etc. Wouldn't it be good to also use btrfs for external disks snapshot? Even if btrfs snapshots works on subvolumes (directories) it is possible to atomically creates a copy-on-write snapshot of a file (with domUs disks on file, including raw) with btrfs clone operation (reflink systemcall, eg: cp --reflink source dest) > > _______________________________________________ > Xen-devel mailing list > Xen-devel@lists.xen.org > http://lists.xen.org/xen-devel