Hi all, I find an interesting thing which confused me for a long time. Until the latest version, live migration can only be used with remote storage such as NFS. I wonder why live migration with local VM image fails to be added to Xen in these years since live migration is supported for a very long time? Are there any technical or industrial concerns about it? If live migration can''t be used with local image, it will be limited used in many clouds. Thanks, Arthur -- Arthur Chunqi Li Department of Computer Science School of EECS Peking University Beijing, China _______________________________________________ Xen-devel mailing list Xen-devel@lists.xen.org http://lists.xen.org/xen-devel
On Tue, Mar 05, 2013 at 12:16:10PM +0800, ????????? <Arthur Chunqi Li> wrote:> Hi all, > I find an interesting thing which confused me for a long time. Until the > latest version, live migration can only be used with remote storage such > as NFS. I wonder why live migration with local VM image fails to be added > to Xen in these years since live migration is supported for a very long > time? Are there any technical or industrial concerns about it? If live > migration can''t be used with local image, it will be limited used in many > clouds.XCP 1.6 does support live migration between hosts using local storage. So it''s more of a toolstack/integration issue rather than a hypervisor issue. -- Pasi
On Tue, Mar 5, 2013 at 4:16 AM, 李春奇 <Arthur Chunqi Li> <yzt356@gmail.com> wrote:> Hi all, > I find an interesting thing which confused me for a long time. Until the > latest version, live migration can only be used with remote storage such as > NFS. I wonder why live migration with local VM image fails to be added to > Xen in these years since live migration is supported for a very long time? > Are there any technical or industrial concerns about it? If live migration > can't be used with local image, it will be limited used in many clouds.I think the big reason is that the core xen.org project focuses primarily on cpu virtualization, and tends to leave the disk management things to be handled in other layers (e.g., filesystem, LVM, &c). XenServer / XCP take a more product-view / holistic approach, which is why they have implemented support for both integrated storage management and storage migration. That said, storage migration is on our radar -- we are waiting for some infrastructure support in the device set-up scripts, but after that, will probably implement storage migration for 4.4. -George _______________________________________________ Xen-devel mailing list Xen-devel@lists.xen.org http://lists.xen.org/xen-devel