From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:49086) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1XHCkC-0004jI-Hr for qemu-devel@nongnu.org; Tue, 12 Aug 2014 10:08:13 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1XHCk7-0002Zl-KO for qemu-devel@nongnu.org; Tue, 12 Aug 2014 10:08:08 -0400 Received: from mx1.redhat.com ([209.132.183.28]:60973) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1XHCk7-0002Zd-CD for qemu-devel@nongnu.org; Tue, 12 Aug 2014 10:08:03 -0400 Message-ID: <53EA1FBB.2000909@redhat.com> Date: Tue, 12 Aug 2014 08:07:55 -0600 From: Eric Blake MIME-Version: 1.0 References: <53EA1541.50500@redhat.com> In-Reply-To: Content-Type: multipart/signed; micalg=pgp-sha256; protocol="application/pgp-signature"; boundary="OX1VQkJa6n59g7uInFend3orluJOgrCPO" Subject: Re: [Qemu-devel] disk image: self-organized format or raw file List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: =?UTF-8?B?5ZC05YW05Y2a?= , Kirill Batuzov Cc: qemu-devel@nongnu.org This is an OpenPGP/MIME signed message (RFC 4880 and 3156) --OX1VQkJa6n59g7uInFend3orluJOgrCPO Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: quoted-printable On 08/12/2014 07:45 AM, =E5=90=B4=E5=85=B4=E5=8D=9A wrote: [please don't top-post on technical lists] > Thanks for your information. It's really helpful. > I think adding a bitmap alongside the raw file ( or just within that fi= le) Umm, how do you propose to add a bitmap within a raw file? The moment the file contains metadata, it is no longer raw, but some other format. You'd need a way to reliably delineate the portion of the file that contains the bitmap and therefore must not be exposed to the guest. > would be suffice to distinguish between present or in backing file. > The idea in FVD looks similar to 'addcow'---use bitmap but delegating > allocation to FS. However FVD seems to have been ignored by community. Care to give a pointer to a URL describing the FVD format? --=20 Eric Blake eblake redhat com +1-919-301-3266 Libvirt virtualization library http://libvirt.org --OX1VQkJa6n59g7uInFend3orluJOgrCPO 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 Comment: Public key at http://people.redhat.com/eblake/eblake.gpg iQEcBAEBCAAGBQJT6h+7AAoJEKeha0olJ0NqkiAIAITBT1lv5tQf4FSOF9YZxWtm QNlB0yRVFiyrmpIOd6uEz6mJ2AN+tyH01UT/pTiYt8Wxg9BLjut4Z2vnJF6l+xDQ RdPQf2iEGI7tf3lQ0eqQDlwAr8W9IOQiZ2r9rOA7MKHPrHZI8eUXsdBePYY6vPsD clV2fl5kCCDZgFAAFbd1/EsD6tjMw2F2AHrVr/yB18Jn6rS0q93dZatcM4VHoudb fLxMPbi/LlYVPdeE9fknsMMzxz5QO0mRqK3Jwr8VBMm6mV08XEiIWGXNxJ/f+3rJ 6zH4FdIfNfnc5pBhvXoKPS4+lDsGp3bSRejJOxJOCLaQJTLC6295TzzWfTvNCfg= =AfBm -----END PGP SIGNATURE----- --OX1VQkJa6n59g7uInFend3orluJOgrCPO--