From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:49863) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1cIxNv-0003l7-JU for qemu-devel@nongnu.org; Mon, 19 Dec 2016 07:49:44 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1cIxNr-0007Pp-Kb for qemu-devel@nongnu.org; Mon, 19 Dec 2016 07:49:43 -0500 Received: from mail-it0-f48.google.com ([209.85.214.48]:35425) by eggs.gnu.org with esmtps (TLS1.0:RSA_AES_128_CBC_SHA1:16) (Exim 4.71) (envelope-from ) id 1cIxNr-0007PS-Fn for qemu-devel@nongnu.org; Mon, 19 Dec 2016 07:49:39 -0500 Received: by mail-it0-f48.google.com with SMTP id c20so58858732itb.0 for ; Mon, 19 Dec 2016 04:49:39 -0800 (PST) MIME-Version: 1.0 In-Reply-To: References: From: Maor Lipchuk Date: Mon, 19 Dec 2016 14:49:38 +0200 Message-ID: Content-Type: text/plain; charset=UTF-8 Subject: Re: [Qemu-devel] Is qemu-img amend an atomic operation? List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: qemu-devel@nongnu.org Cc: Nir Soffer , Kevin Wolf On Mon, Dec 19, 2016 at 2:47 PM, Maor Lipchuk wrote: > Hi All, > > Does amend considered as an atomic operation or should we mark a volume as > ILLEGAL once the amend operation fails? > > also, if I call amend, but downgrade the QCOW volume compatibility level > from 1.1 to 0.10, is that atomic as well (or not, based on the answer on > the previous question)? > > Regards, > Maor > Adding also Nir and Kevin to the thread.