From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from [140.186.70.92] (port=46893 helo=eggs.gnu.org) by lists.gnu.org with esmtp (Exim 4.43) id 1OW9FM-0001tW-AB for qemu-devel@nongnu.org; Tue, 06 Jul 2010 10:35:44 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.69) (envelope-from ) id 1OW9FL-0005NS-0K for qemu-devel@nongnu.org; Tue, 06 Jul 2010 10:35:40 -0400 Received: from adelie.canonical.com ([91.189.90.139]:42508) by eggs.gnu.org with esmtp (Exim 4.69) (envelope-from ) id 1OW9FK-0005NF-Sn for qemu-devel@nongnu.org; Tue, 06 Jul 2010 10:35:38 -0400 Received: from loganberry.canonical.com ([91.189.90.37]) by adelie.canonical.com with esmtp (Exim 4.69 #1 (Debian)) id 1OW9FI-0004oh-1n for ; Tue, 06 Jul 2010 15:35:36 +0100 Received: from loganberry.canonical.com (localhost [127.0.0.1]) by loganberry.canonical.com (Postfix) with ESMTP id E78D52E828F for ; Tue, 6 Jul 2010 15:35:29 +0100 (BST) MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Date: Tue, 06 Jul 2010 14:29:57 -0000 From: Jes Sorensen Sender: bounces@canonical.com References: <20100705154408.6052.2473.malonedeb@potassium.ubuntu.com> Message-Id: <20100706142957.24259.75536.malone@palladium.canonical.com> Errors-To: bounces@canonical.com Subject: [Qemu-devel] [Bug 601946] Re: [Feature request] qemu-img multi-threaded compressed image conversion Reply-To: Bug 601946 <601946@bugs.launchpad.net> List-Id: qemu-devel.nongnu.org List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: qemu-devel@nongnu.org Hi, The problem is that it is more than just the compression that is the problem, with modern cpus disk speed is a problem, and compression is often stream based. For now there isn't enough valid data that this qualifies as a bug/rfe. If you decide to try and implement it, and provide data showing that this is actually a win, please reopen this. Regards, Jes -- = [Feature request] qemu-img multi-threaded compressed image conversion https://bugs.launchpad.net/bugs/601946 You received this bug notification because you are a member of qemu- devel-ml, which is subscribed to QEMU. Status in QEMU: New Bug description: Feature request: qemu-img multi-threaded compressed image conversion Suppose I want to convert raw image to compressed qcow2. Multi-threaded con= version will be much faster, because bottleneck is compressing data.