Hi Fran,

Fortunately, qemu-img(1) is able to directly utilise RBD (supporting
sparse block devices)!

Please refer to http://docs.ceph.com/docs/hammer/rbd/qemu-rbd/ for examples.

Cheers,
Kees

On 13-07-16 09:18, Fran Barrera wrote:
> Can you explain how you do this procedure? I have the same problem
> with the large images and snapshots.
>
> This is what I do:
>
> # qemu-img convert -f qcow2 -O raw image.qcow2 image.img
> # openstack image create image.img
>
> But the image.img is too large.

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