From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mailman by lists.gnu.org with tmda-scanned (Exim 4.43) id 1Fxj5T-0006SS-Cp for qemu-devel@nongnu.org; Tue, 04 Jul 2006 07:29:03 -0400 Received: from exim by lists.gnu.org with spam-scanned (Exim 4.43) id 1Fxj5S-0006Qt-FC for qemu-devel@nongnu.org; Tue, 04 Jul 2006 07:29:02 -0400 Received: from [199.232.76.173] (helo=monty-python.gnu.org) by lists.gnu.org with esmtp (Exim 4.43) id 1Fxj5S-0006Qa-6R for qemu-devel@nongnu.org; Tue, 04 Jul 2006 07:29:02 -0400 Received: from [81.103.221.48] (helo=mtaout02-winn.ispmail.ntl.com) by monty-python.gnu.org with esmtp (Exim 4.52) id 1FxjJ7-0002xF-4g for qemu-devel@nongnu.org; Tue, 04 Jul 2006 07:43:09 -0400 Received: from aamtaout03-winn.ispmail.ntl.com ([81.103.221.35]) by mtaout02-winn.ispmail.ntl.com with ESMTP id <20060704112900.UPFX27023.mtaout02-winn.ispmail.ntl.com@aamtaout03-winn.ispmail.ntl.com> for ; Tue, 4 Jul 2006 12:29:00 +0100 Received: from suse10.valgrind.org ([82.21.96.252]) by aamtaout03-winn.ispmail.ntl.com with ESMTP id <20060704112900.WJRB18889.aamtaout03-winn.ispmail.ntl.com@suse10.valgrind.org> for ; Tue, 4 Jul 2006 12:29:00 +0100 From: Julian Seward Subject: Re: [Qemu-devel] QCow v2 Date: Tue, 4 Jul 2006 12:28:50 +0100 References: <1151981142.5476.13.camel@localhost.localdomain> <46d6db660607040344i7bc7e4cbx83fc424a6ebefa8a@mail.gmail.com> <44AA49B3.1090404@bellard.org> In-Reply-To: <44AA49B3.1090404@bellard.org> MIME-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: 7bit Content-Disposition: inline Message-Id: <200607041228.50520.jseward@acm.org> Reply-To: qemu-devel@nongnu.org List-Id: qemu-devel.nongnu.org List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: qemu-devel@nongnu.org I have used VMware on a Windows host with the vmdk files on a compressed NTFS partition. The result of compression was eventually to cause the vmdk files to become extremely fragmented (tens of thousands of fragments) which seriously reduces performance in the end. I'm not sure why this happens. So it would be good not to fall into that particular hole. J On Tuesday 04 July 2006 11:57, Fabrice Bellard wrote: > If it does not compress significantly better I see no need for that > (remember that qemu uses 4 KB clusters). > > Fabrice. > > Christian MICHON wrote: > > how about also adding lzma compression for qcow ? > > I know how to do this inside linux kernel, but lzma'ed qcow images > > for windows guests could be a very nice addition too. > > > > Thank Mark for the notes. I'll look at it to see how to start a > > lzma patch for qcow... > > > > On 7/4/06, Fabrice Bellard wrote: > >> Regarding my current plans, the next qcow evolution will be the support > >> for multiple snapshots. Each snapshot will be tagged by a label. > >> > >> Fabrice. > > _______________________________________________ > Qemu-devel mailing list > Qemu-devel@nongnu.org > http://lists.nongnu.org/mailman/listinfo/qemu-devel