Re: rbd map error with new rbd format

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On Mon, Oct 22, 2012 at 2:04 AM,  <Eric_YH_Chen@xxxxxxxxxx> wrote:
>
>> At this point format 2 is understood by the kernel, and the
>> infrastructure for opening parent images and the I/O path
>> for clones is in progress. We estimate about 4-8 weeks for this,
>> but you should check back then.
>> Kernel 3.6 was already released, so this would probably go into 3.8 or
>> 3.9.
>
> Hi Josh:
>
> Please let me clarify some point.
> If we want to map an RBD image to a kernel object, it may not ready until kernel 3.8 or 3.9.
Right.

> But if we want to running qemu with RBD, it is ready in kernel 3.6, since QEMU can access it via librbd directly.
It doesn't even need to be kernel 3.6 — it just needs to be a
sufficiently new version of librbd. Hurray userspace! :)
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