Re: [Qemu-devel] [PATCHv2] block: add native support for NFS

["Daniel P. Berrange" <berrange@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" <berrange@redhat.com>:
> >>
> >>>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://<host>/<export>/<filename>
> >>>
> >>>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 :|