On Thu, Oct 22, 2015 at 10:59 PM, Allen Liao <aliao.svsgames@xxxxxxxxx> wrote:
> Does ceph guarantee image consistency if an rbd image is unmapped on one
> machine then immediately mapped on another machine? If so, does the same
> apply to issuing a snapshot command on machine B as soon as the unmap
> command finishes on machine A?
>
> In other words, does the unmap operation flush all changes to the ceph
> cluster synchronously?
Yes, rbd unmap won't return from the kernel until all cached buffers
are flushed.
Thanks,
Ilya
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