From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:34944) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1bQHyX-0000Sq-0L for qemu-devel@nongnu.org; Thu, 21 Jul 2016 13:41:33 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1bQHyS-0007sv-SI for qemu-devel@nongnu.org; Thu, 21 Jul 2016 13:41:31 -0400 Received: from mx1.redhat.com ([209.132.183.28]:34495) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1bQHyS-0007s4-MM for qemu-devel@nongnu.org; Thu, 21 Jul 2016 13:41:28 -0400 Date: Thu, 21 Jul 2016 18:41:23 +0100 From: "Dr. David Alan Gilbert" Message-ID: <20160721174122.GM2195@work-vm> References: <1469077560-20620-1-git-send-email-zhang.zhanghailiang@huawei.com> <20160721121914.GG13528@redhat.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20160721121914.GG13528@redhat.com> Subject: Re: [Qemu-devel] [RFC PATCH 0/2] Migration: support working on file:url List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: "Daniel P. Berrange" Cc: zhanghailiang , qemu-devel@nongnu.org, amit.shah@redhat.com, peter.huangpeng@huawei.com, quintela@redhat.com * Daniel P. Berrange (berrange@redhat.com) wrote: > On Thu, Jul 21, 2016 at 01:05:58PM +0800, zhanghailiang wrote: > > It is more simple to use file:url to migrate VM into file. > > Besides, it will be used in memory snapshot. > > NB, you can already migrate into a file > > "exec:/bin/cat > /path/to/file" > > and likewise > > qemu -incoming "exec:/bin/cat /path/to/file" > > This avoids the problem with POSIX I/O on plain files not actually > supporting O_NONBLOCK in any sensible manner, which your file: > suggestion suffers from. Hmm that's a shame; I liked this idea as a nice simplification of the exec: stuff. Dave > Regards, > Daniel > -- > |: http://berrange.com -o- http://www.flickr.com/photos/dberrange/ :| > |: http://libvirt.org -o- http://virt-manager.org :| > |: http://autobuild.org -o- http://search.cpan.org/~danberr/ :| > |: http://entangle-photo.org -o- http://live.gnome.org/gtk-vnc :| -- Dr. David Alan Gilbert / dgilbert@redhat.com / Manchester, UK