From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([208.118.235.92]:50085) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1Ue6mH-0000NY-Ss for qemu-devel@nongnu.org; Sun, 19 May 2013 12:48:14 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1Ue6mC-00081j-CC for qemu-devel@nongnu.org; Sun, 19 May 2013 12:48:09 -0400 Received: from mx1.redhat.com ([209.132.183.28]:47047) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1Ue6mC-00081J-4H for qemu-devel@nongnu.org; Sun, 19 May 2013 12:48:04 -0400 Date: Sun, 19 May 2013 17:47:55 +0100 From: "Richard W.M. Jones" Message-ID: <20130519164755.GA18311@redhat.com> References: <1368693379-8434-1-git-send-email-stefanha@redhat.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1368693379-8434-1-git-send-email-stefanha@redhat.com> Subject: Re: [Qemu-devel] [PATCH v4 0/8] block: drive-backup live backup command List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: Stefan Hajnoczi Cc: Kevin Wolf , Fam Zheng , qemu-devel@nongnu.org, xiawenc@linux.vnet.ibm.com, imain@redhat.com, Paolo Bonzini , dietmar@proxmox.com On Thu, May 16, 2013 at 10:36:11AM +0200, Stefan Hajnoczi wrote: [...] > How can drive-backup be used? > ----------------------------- > The simplest use-case is to copy a point-in-time snapshot to a local file. > > More advanced users may wish to make the target an NBD URL. The NBD server > listening on the other side can process the backup writes any way it wishes. I > previously posted an RFC series with a backup server that streamed Dietmar's > VMA backup archive format. I'm guessing the answer is no, but thought I would ask: Is there any way to use this to do point-in-time inspection of guests? AFAICT the only way to do it would be to make a complete copy of a guest disk in another file. Rich. -- Richard Jones, Virtualization Group, Red Hat http://people.redhat.com/~rjones virt-top is 'top' for virtual machines. Tiny program with many powerful monitoring features, net stats, disk stats, logging, etc. http://people.redhat.com/~rjones/virt-top