[Gluster-users] Block storage with Qemu-Tcmu

Prasanna Kalever pkalever at redhat.com
Mon Nov 7 08:57:55 UTC 2016

On Mon, Nov 7, 2016 at 1:53 PM, Lindsay Mathieson
<lindsay.mathieson at gmail.com> wrote:
> On 7 November 2016 at 17:01, Prasanna Kalever <pkalever at redhat.com> wrote:
>> Yet another approach to achieve Gluster Block Storage is with Qemu-Tcmu.
> Thanks Prasanna, interesting reading.
> From a quick scan, there doesn't seem to be any particular advantage
> over qemu using gfapi directly? Is this more aimed at apps that can't
> use gfapi such as vmware or as a replacement for NFS?

As mentioned in the conclusion part in the blog, the advantage here is
easy snapshots.
Qemu-tcmu will come up with '--snapshot' option (work still in
progress) as much like qemu-img.
Supporting this within gluster needs additional maintenance of
qemu-block xlator which is the clone of qcow2 spec implementation,
which could be more work.

Also the qemu gluster protocol driver (access gfapi) is more mature and tested.


> --
> Lindsay

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