From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-0.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,HTML_MESSAGE,MAILING_LIST_MULTI,SPF_HELO_NONE, SPF_PASS autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 1D892C43457 for ; Tue, 20 Oct 2020 01:32:34 +0000 (UTC) Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id B60D522244 for ; Tue, 20 Oct 2020 01:32:32 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org B60D522244 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=intel.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Received: from localhost ([::1]:49242 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1kUgVr-00080n-Tr for qemu-devel@archiver.kernel.org; Mon, 19 Oct 2020 21:32:31 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:47960) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1kUgUn-0007UI-CJ; Mon, 19 Oct 2020 21:31:25 -0400 Received: from mga03.intel.com ([134.134.136.65]:51078) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1kUgUj-00017j-BO; Mon, 19 Oct 2020 21:31:24 -0400 IronPort-SDR: ugGdnybeWXOx8JqaVMIblaT16CnRBgmnVpsiteg5d8dlC8GiYKo63x/I7oINimkDdNqcbx8r52 Jrp+Oyp3mTNA== X-IronPort-AV: E=McAfee;i="6000,8403,9779"; a="167223396" X-IronPort-AV: E=Sophos;i="5.77,395,1596524400"; d="scan'208,217";a="167223396" X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from fmsmga003.fm.intel.com ([10.253.24.29]) by orsmga103.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 19 Oct 2020 18:31:15 -0700 IronPort-SDR: di0uAJjZDjXTLChdx72wmlkyDnwiCxXViBsK9pwOYbxg5fxBzBjj9GrQJgIl8ZKHGRo3c0MBXB nZoeTW6EBs+A== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.77,395,1596524400"; d="scan'208,217";a="358339964" Received: from fmsmsx605.amr.corp.intel.com ([10.18.126.85]) by FMSMGA003.fm.intel.com with ESMTP; 19 Oct 2020 18:31:15 -0700 Received: from shsmsx601.ccr.corp.intel.com (10.109.6.141) by fmsmsx605.amr.corp.intel.com (10.18.126.85) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.1713.5; Mon, 19 Oct 2020 18:31:15 -0700 Received: from shsmsx601.ccr.corp.intel.com (10.109.6.141) by SHSMSX601.ccr.corp.intel.com (10.109.6.141) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.1713.5; Tue, 20 Oct 2020 09:31:13 +0800 Received: from shsmsx601.ccr.corp.intel.com ([10.109.6.141]) by SHSMSX601.ccr.corp.intel.com ([10.109.6.141]) with mapi id 15.01.1713.004; Tue, 20 Oct 2020 09:31:13 +0800 From: "Wang, Wei W" To: "kwolf@redhat.com" , "mreitz@redhat.com" , "lersek@redhat.com" Subject: Question on Compression for Raw Image Thread-Topic: Question on Compression for Raw Image Thread-Index: Adamfp2lUlxQj0EMRyaTLkAdXyA8QQ== Date: Tue, 20 Oct 2020 01:31:13 +0000 Message-ID: <516589845d6f42d0b00784d16b59b5dc@intel.com> Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: dlp-product: dlpe-windows dlp-reaction: no-action dlp-version: 11.5.1.3 x-originating-ip: [10.239.127.36] Content-Type: multipart/alternative; boundary="_000_516589845d6f42d0b00784d16b59b5dcintelcom_" MIME-Version: 1.0 Received-SPF: pass client-ip=134.134.136.65; envelope-from=wei.w.wang@intel.com; helo=mga03.intel.com X-detected-operating-system: by eggs.gnu.org: First seen = 2020/10/19 21:31:16 X-ACL-Warn: Detected OS = FreeBSD 9.x or newer [fuzzy] X-Spam_score_int: -41 X-Spam_score: -4.2 X-Spam_bar: ---- X-Spam_report: (-4.2 / 5.0 requ) BAYES_00=-1.9, HTML_MESSAGE=0.001, RCVD_IN_DNSWL_MED=-2.3, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: "qemu-devel@nongnu.org" , "qemu-block@nongnu.org" Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" --_000_516589845d6f42d0b00784d16b59b5dcintelcom_ Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable Hi, Does anyone know the reason why raw-format.c doesn't have compression suppo= rt (but qcow has the supported added)? For example, raw image backup with compression, "qemu-img convert -c -O raw= origin.img dist.img", doesn't work. Thanks, Wei --_000_516589845d6f42d0b00784d16b59b5dcintelcom_ Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable

Hi,<= o:p>

 

Does= anyone know the reason why raw-format.c doesn’t have compression sup= port (but qcow has the supported added)?

For = example, raw image backup with compression, “qemu-img convert -c = ;-O raw origin.img  dist.img”, doesn’t work.

 

Than= ks,

Wei<= o:p>

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