From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([140.186.70.92]:52820) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1QWncN-0003VW-TC for qemu-devel@nongnu.org; Wed, 15 Jun 2011 06:46:40 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1QWncL-0001vr-HH for qemu-devel@nongnu.org; Wed, 15 Jun 2011 06:46:39 -0400 Received: from mail.univention.de ([82.198.197.8]:1576) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1QWncL-0001vP-46 for qemu-devel@nongnu.org; Wed, 15 Jun 2011 06:46:37 -0400 Received: from localhost (localhost [127.0.0.1]) by slugis.knut.univention.de (Postfix) with ESMTP id E4E1367302F for ; Wed, 15 Jun 2011 12:46:32 +0200 (CEST) Received: from localhost (localhost [127.0.0.1]) by slugis.knut.univention.de (Postfix) with ESMTP id D9420673030 for ; Wed, 15 Jun 2011 12:46:32 +0200 (CEST) Received: from mail.univention.de ([127.0.0.1]) by localhost (slugis.knut.univention.de [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id vdgvsnN7rhp7 for ; Wed, 15 Jun 2011 12:46:32 +0200 (CEST) Received: from stave.knut.univention.de (stave.knut.univention.de [192.168.0.191]) by slugis.knut.univention.de (Postfix) with ESMTPSA id 92D7467302F for ; Wed, 15 Jun 2011 12:46:32 +0200 (CEST) From: Philipp Hahn Date: Wed, 15 Jun 2011 12:46:23 +0200 References: <1308075511-4745-1-git-send-email-stefanha@linux.vnet.ibm.com> In-Reply-To: <1308075511-4745-1-git-send-email-stefanha@linux.vnet.ibm.com> MIME-Version: 1.0 Content-Type: multipart/signed; boundary="nextPart1559536.3aPTvLoZJV"; protocol="application/pgp-signature"; micalg=pgp-sha1 Content-Transfer-Encoding: 7bit Message-Id: <201106151246.28880.hahn@univention.de> Subject: Re: [Qemu-devel] [PATCH 00/13] QED image streaming List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: qemu-devel@nongnu.org --nextPart1559536.3aPTvLoZJV Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Content-Disposition: inline Hello, hopefully just a quick question... On Tuesday 14 June 2011 20:18:18 Stefan Hajnoczi wrote: > This patch series adds image streaming support for QED image files. Other > image formats can also be supported in the future. > > Image streaming populates the file in the background while the guest is > running. This makes it possible to start the guest before its image file > has been fully provisioned. =2E.. > When image streaming is enabled, the unallocated regions of the image file > are populated with the data from the backing file. This occurs in the > background and the guest can perform regular I/O in the meantime. Once t= he > entire backing file has been streamed, the image no longer requires a > backing file and will drop its reference. Does this also work for intermediate images, that is =2D master image on a NFS share, =2D local copy on a local drive using CoR-streaming from master, =2D local instance based on local copy using CoW. We normally have mostly independent servers without a shared storage, expec= t a=20 global NFS share for the master images. Currently we have to copy the maste= r=20 image to the local server first, before we than can create lots of instance= s=20 from then, which have few changed relative to the master, so we don't want= =20 the copying to happen there. If haven't looked at QED yet, so thanks in advance for your answer. Sincerely Philipp Hahn =2D-=20 Philipp Hahn Open Source Software Engineer hahn@univention.de Univention GmbH Linux for Your Business fon: +49 421 22 232- 0 Mary-Somerville-Str.1 D-28359 Bremen fax: +49 421 22 232-99 http://www.univention.de/ --nextPart1559536.3aPTvLoZJV Content-Type: application/pgp-signature; name=signature.asc Content-Description: This is a digitally signed message part. -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.9 (GNU/Linux) iEYEABECAAYFAk34jX8ACgkQYPlgoZpUDjltzgCgt34Ey9FeI8xUy791QI21tz0E GWkAnjRstZlPT+QDKai0blA5OFEnLd1i =m+du -----END PGP SIGNATURE----- --nextPart1559536.3aPTvLoZJV--