From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([208.118.235.92]:35997) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1TlAQd-0001gT-4r for qemu-devel@nongnu.org; Tue, 18 Dec 2012 22:34:44 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1TlAQc-0004TM-4z for qemu-devel@nongnu.org; Tue, 18 Dec 2012 22:34:43 -0500 Received: from e23smtp05.au.ibm.com ([202.81.31.147]:41833) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1TlAQb-0004T7-JR for qemu-devel@nongnu.org; Tue, 18 Dec 2012 22:34:42 -0500 Received: from /spool/local by e23smtp05.au.ibm.com with IBM ESMTP SMTP Gateway: Authorized Use Only! Violators will be prosecuted for from ; Wed, 19 Dec 2012 13:31:47 +1000 Received: from d23relay04.au.ibm.com (d23relay04.au.ibm.com [9.190.234.120]) by d23dlp03.au.ibm.com (Postfix) with ESMTP id 93453357804E for ; Wed, 19 Dec 2012 14:34:30 +1100 (EST) Received: from d23av03.au.ibm.com (d23av03.au.ibm.com [9.190.234.97]) by d23relay04.au.ibm.com (8.13.8/8.13.8/NCO v10.0) with ESMTP id qBJ3NPbI66060370 for ; Wed, 19 Dec 2012 14:23:26 +1100 Received: from d23av03.au.ibm.com (loopback [127.0.0.1]) by d23av03.au.ibm.com (8.14.4/8.13.1/NCO v10.0 AVout) with ESMTP id qBJ3YSjF019864 for ; Wed, 19 Dec 2012 14:34:29 +1100 Message-ID: <50D135B4.1030704@linux.vnet.ibm.com> Date: Wed, 19 Dec 2012 11:34:12 +0800 From: Wenchao Xia MIME-Version: 1.0 References: <1355725509-5429-1-git-send-email-xiawenc@linux.vnet.ibm.com> <1355725509-5429-5-git-send-email-xiawenc@linux.vnet.ibm.com> <24E144B8C0207547AD09C467A8259F75578B461B@lisa.maurer-it.com> <50CECBFA.6090000@linux.vnet.ibm.com> <24E144B8C0207547AD09C467A8259F75578B46F4@lisa.maurer-it.com> <50CEDD39.6010803@linux.vnet.ibm.com> <24E144B8C0207547AD09C467A8259F75578B4977@lisa.maurer-it.com> <50D045A4.7030706@linux.vnet.ibm.com> <24E144B8C0207547AD09C467A8259F75578B5D89@lisa.maurer-it.com> In-Reply-To: <24E144B8C0207547AD09C467A8259F75578B5D89@lisa.maurer-it.com> Content-Type: text/plain; charset=GB2312 Content-Transfer-Encoding: 8bit Subject: Re: [Qemu-devel] [PATCH 4/6] snapshot: implemention of common API to take snapshots List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: Dietmar Maurer Cc: "kwolf@redhat.com" , "aliguori@us.ibm.com" , "stefanha@gmail.com" , "qemu-devel@nongnu.org" , "blauwirbel@gmail.com" , "pbonzini@redhat.com" ÓÚ 2012-12-18 18:36, Dietmar Maurer дµÀ: >>>> I am not familar with those tools >>> >>> You do not know LVM? >>> >> Honest speaking I use LVM tools little. I wonder why lvcreate can't be used, >> for block internal snapshot I think this patch have same function as your >> previous patch, what is missing? > > Qemu does not have any information about the underlying storage. So creating > lvm snapshot must be done from the management software. > OK, I think underlying storage is another level of issue, just wondering what this patch miss to stop you use external tool, did you called a LVM/nexenta C API in previous patch? -- Best Regards Wenchao Xia