On Wed, May 22, 2013 at 12:11 PM, Paolo Bonzini <pbonz...@redhat.com> wrote:

> > Essentially, if you're RWMJ (not me), and you're keeping a full
> > mirror, it's clear that the mirror write stream goes to an nbd server,
> > but is it possible to attach a reader to that same nbd server and read
> > things back (read-only)?
>
> Yes, it can be done with both qemu-nbd and the QEMU nbd server commands.


Then this means, if there was an active mirror (or snapshot being created),
it would
be easy to attach an nbd client as a reader to it even as it is being
synchronized
(perhaps dangerous?).

-- 
Wolf

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