From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:36558) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1YxBw8-0002hA-Oo for qemu-devel@nongnu.org; Tue, 26 May 2015 06:18:20 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1YxBw2-0006WY-P7 for qemu-devel@nongnu.org; Tue, 26 May 2015 06:18:16 -0400 Received: from mail-wi0-x236.google.com ([2a00:1450:400c:c05::236]:36527) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1YxBw2-0006WE-JQ for qemu-devel@nongnu.org; Tue, 26 May 2015 06:18:10 -0400 Received: by wizk4 with SMTP id k4so71804020wiz.1 for ; Tue, 26 May 2015 03:18:10 -0700 (PDT) Date: Tue, 26 May 2015 11:18:05 +0100 From: Stefan Hajnoczi Message-ID: <20150526101805.GG13262@stefanha-thinkpad.redhat.com> References: <20150523203842.20290.75365.malonedeb@chaenomeles.canonical.com> <20150524075419.20152.84643.malone@chaenomeles.canonical.com> MIME-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha1; protocol="application/pgp-signature"; boundary="GdbWtwDHkcXqP16f" Content-Disposition: inline In-Reply-To: <20150524075419.20152.84643.malone@chaenomeles.canonical.com> Subject: Re: [Qemu-devel] [Bug 1458239] Re: Use qed instead of qcow2 for "-snapshot" functionality List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: =?utf-8?B?0JrQvtGA0LXQvdCx0LXRgNCzINCc0LDRgNC6?= <1458239@bugs.launchpad.net> Cc: qemu-devel@nongnu.org --GdbWtwDHkcXqP16f Content-Type: text/plain; charset=utf-8 Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On Sun, May 24, 2015 at 07:54:19AM -0000, =D0=9A=D0=BE=D1=80=D0=B5=D0=BD=D0= =B1=D0=B5=D1=80=D0=B3 =D0=9C=D0=B0=D1=80=D0=BA wrote: > Sorry, I did not know tha qed is just experimental format. I thought > that qed is successor of qcow2. Can you add some links that qcow is not > worse than qed ? I did not make any benchmark, just read some articles Hi, QED's write performance optimization has been added to qcow2 (-o lazy_refcounts=3Don). qcow2 has been optimized further in the meantime and is the recommended image file format if raw lacks features that you need. Stefan --GdbWtwDHkcXqP16f Content-Type: application/pgp-signature -----BEGIN PGP SIGNATURE----- Version: GnuPG v1 iQEcBAEBAgAGBQJVZEhdAAoJEJykq7OBq3PInyMH+wXzZObNEKOi5XfVAv1/MJOW rCwOWWgFAaW1KMCDT8avZtRjbYTgjmnMvIhldH16s6vifdMn8bE1e02iQzdCv7Rl 19sGHxWrS7pCnMVnlx7/U+O992hygqB2hsCini9s+dJIEBno6OHmDO0O1Re3UGEX 3GvL741r3dcDgdyom93pnhmh90B5vqxhxNqWt+1JrNHYZlIpyu4dANeU94oBVkY3 3hioI8VGQUJ+VpYdeboMh2kSaK5AMortPbd0LlaOfAcr3R+Sza8wAdJugz6KTyMk Q8KkpEYSP5coaQInuqamTSCMgBQkHRY84xRWgBxawK6q2LzGPiQpq7yJIHiGHYg= =NDXJ -----END PGP SIGNATURE----- --GdbWtwDHkcXqP16f--