From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:56861) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1VtED6-00071j-IN for qemu-devel@nongnu.org; Wed, 18 Dec 2013 05:18:40 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1VtED1-0007f3-5p for qemu-devel@nongnu.org; Wed, 18 Dec 2013 05:18:36 -0500 Received: from mx1.redhat.com ([209.132.183.28]:65101) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1VtED0-0007ez-Sw for qemu-devel@nongnu.org; Wed, 18 Dec 2013 05:18:31 -0500 Date: Wed, 18 Dec 2013 10:18:18 +0000 From: "Daniel P. Berrange" Message-ID: <20131218101818.GE16168@redhat.com> References: <1387271725-17060-1-git-send-email-pl@kamp.de> <20131217173202.GJ14832@redhat.com> <363AFFBF-8F24-4AC3-840F-481A523402B4@kamp.de> <52B17223.2070708@redhat.com> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline In-Reply-To: <52B17223.2070708@redhat.com> Subject: Re: [Qemu-devel] [PATCHv2] block: add native support for NFS Reply-To: "Daniel P. Berrange" List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: Orit Wasserman Cc: "kwolf@redhat.com" , "famz@redhat.com" , Peter Lieven , "qemu-devel@nongnu.org" , "stefanha@redhat.com" , "pbonzini@redhat.com" On Wed, Dec 18, 2013 at 12:00:03PM +0200, Orit Wasserman wrote: > On 12/18/2013 01:03 AM, Peter Lieven wrote: > > > > > >>Am 17.12.2013 um 18:32 schrieb "Daniel P. Berrange" : > >> > >>>On Tue, Dec 17, 2013 at 10:15:25AM +0100, Peter Lieven wrote: > >>>This patch adds native support for accessing images on NFS shares without > >>>the requirement to actually mount the entire NFS share on the host. > >>> > >>>NFS Images can simply be specified by an url of the form: > >>>nfs://// > >>> > >>>For example: > >>>qemu-img create -f qcow2 nfs://10.0.0.1/qemu-images/test.qcow2 > >> > >>Does it support other config tunables, eg specifying which > >>NFS version to use 2/3/4 ? If so will they be available as > >>URI parameters in the obvious manner ? > > > >currently only v3 is supported by libnfs. what other tunables would you like to see? > > > > For live migration we need the sync option (async ignores O_SYNC and O_DIRECT sadly), > will it be supported? or will it be the default? Since this is bypassing the client kernel FS I/O layer question around support of things like O_SYNC/O_DIRECT are not applicable. 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 :|