ceph rbd image checksums

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On 08/24/2014 08:27 PM, Andrei Mikhailovsky wrote:
> Hello guys,
>
> I am planning to do rbd images off-site backup with rbd export-diff and I was wondering if ceph has checksumming functionality so that I can compare source and destination files for consistency? If so, how do I retrieve the checksum values from the ceph cluster?
>

That would be rather difficult. There is no checksum, but to have a 
valid checksum you would need to verify the whole RBD image.

That means reading the whole image and calculating the checksum based on 
that.

> Thanks
>
> Andrei
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> ceph-users at lists.ceph.com
> http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
>


-- 
Wido den Hollander
42on B.V.
Ceph trainer and consultant

Phone: +31 (0)20 700 9902
Skype: contact42on


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