From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([208.118.235.92]:54314) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1TUJNN-0008DR-NF for qemu-devel@nongnu.org; Fri, 02 Nov 2012 11:41:42 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1TUJNI-0007wz-Fy for qemu-devel@nongnu.org; Fri, 02 Nov 2012 11:41:41 -0400 Received: from mx1.redhat.com ([209.132.183.28]:54366) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1TUJNI-0007wu-5i for qemu-devel@nongnu.org; Fri, 02 Nov 2012 11:41:36 -0400 Message-ID: <5093E9A8.4090801@redhat.com> Date: Fri, 02 Nov 2012 09:41:28 -0600 From: Eric Blake MIME-Version: 1.0 References: <20121102.172447.47346577.k.suzaki@aist.go.jp> <20121103.001805.37445977.k.suzaki@aist.go.jp> In-Reply-To: <20121103.001805.37445977.k.suzaki@aist.go.jp> Content-Type: multipart/signed; micalg=pgp-sha256; protocol="application/pgp-signature"; boundary="------------enig72A66E89821E0763CC79531B" Subject: Re: [Qemu-devel] live migration which includes previos snapshot List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: Kuniyasu Suzaki Cc: stefanha@gmail.com, qemu-devel@nongnu.org, pbonzini@redhat.com This is an OpenPGP/MIME signed message (RFC 2440 and 3156) --------------enig72A66E89821E0763CC79531B Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable On 11/02/2012 09:18 AM, Kuniyasu Suzaki wrote: >> 1. Make the original image read-only accessible over NFS. >> 2. Modify QEMU to create two external snapshot files when the VM is >> paused for migration (during your fork operation): >> >> /host-a/original.qcow2 >> /host-a/new.qcow2 (backing file: /host-a/original.qcow2) >> /host-b/new.qcow2 (backing file: /host-b/original.qcow2) >> >> 3. After fork the two VMs will write into their respective new.qcow2 >> files. original.qcow2 is never modified anymore. >=20 > Does it means nested qcow2? > Does it allow to use a snapshot image in original.qcow2? > # I want to share a snapshot image taken by "savevm" on two QEMUs. This is not yet possible, someone has to step up and write patches to make it possible. --=20 Eric Blake eblake@redhat.com +1-919-301-3266 Libvirt virtualization library http://libvirt.org --------------enig72A66E89821E0763CC79531B Content-Type: application/pgp-signature; name="signature.asc" Content-Description: OpenPGP digital signature Content-Disposition: attachment; filename="signature.asc" -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.12 (GNU/Linux) Comment: Public key at http://people.redhat.com/eblake/eblake.gpg Comment: Using GnuPG with Mozilla - http://www.enigmail.net/ iQEcBAEBCAAGBQJQk+moAAoJEKeha0olJ0Nq8PAH/3E9Ci43zbB3JRMOA17y3U6i BJmsMgzeAEqMPmOxoHxzC1H+bY+2h6sePmwXjC64b/bgxc4HtsXwEXqDr6704ohh 3h+Ca1Ebw2mJyDpC61xIv6mAbQeTqhkKlKPF6d7eKmgRCs/EflvpiBiHRyiZPvzv 7ZuIjflbauJw3YzgBNyiuaT7NrjBIT1RC2cJ3bYC84fpCpq7v+c9fdNtSh/rziSG EldiWDRtHU9PaDsIqJlotVqYd65o8Qu3dsle1OwG2gCQPC70/jCfCBH0rkdlzXWW KolGg4jCN6bnRyRXbBsFzKlrBFJPDRoJfiePGaL6FSZ5sA8VXSuj4+BMM34Wnmw= =z//Q -----END PGP SIGNATURE----- --------------enig72A66E89821E0763CC79531B--