I wrote some scripts based on this page. 

https://ceph.com/dev-notes/incremental-snapshots-with-rbd/ [1] 

We export the whole image to an external array, then export daily diffs.
The array is then rotated weekly. 

Even with "--rbd-concurrent-management-ops 20" it is a very slow
export/import process. We are discussing changing the process after
having to restore some data recently. We are going to export to a second
Ceph cluster as a standby cluster. Then export to an external array for
off-site storage. 

Hope that helps, 

Chris 

On 2015-09-22 6:38 am, J-P Methot wrote: 

> Hi,
> 
> We've been considering periodically backing up rbds from ceph to a
> different storage backend, just in case. I've thought of a few ways this
> could be possible, but I am curious if anybody on this list is currently
> doing that.
> 
> Are you currently backing up data that is contained in ceph? What do you
> think is the best way to do it?
 

Links:
------
[1] https://ceph.com/dev-notes/incremental-snapshots-with-rbd/
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