Re: [libvirt] [PATCH] rbd: Use rbd_create3 to create RBD format 2 images by default
On 09/12/2013 04:12 PM, Daniel P. Berrange wrote:
On Thu, Sep 12, 2013 at 11:27:10AM +0200, Wido den Hollander wrote:
> This new RBD format supports snapshotting and cloning. By having
> libvirt create images in format 2 end-users of the created images
> can benefit of the new RBD format.
What's the compatibility like here. If one node creates a v2 image,
can a host which only knows v1 still use that v2 image for booting
guests ?
Only very old clients won't be able to open v2 images when they only
support v1.
Ceph is however a fast moving project where almost all users are on the
most recent versions of Ceph due to new features and bug fixes.
Wido
Daniel