Hi,

i am running a Ceph cluster that contains the following RBD image: 

root@ceph0:~# rbd info -p cephstorage debian_6_0_9_template_system
rbd image 'debian_6_0_9_template_system':
        size 30720 MB in 7680 objects
        order 22 (4096 kB objects)
        block_name_prefix: rbd_data.1907c2ae8944a
        format: 2
        features: layering, striping
        stripe unit: 4096 kB
        stripe count: 1

If I make a flattened clone of the image (create a snapshot - protect the 
snapshot - clone - flatten the clone) the output of rbd image is:

root@ceph0:~# rbd info -p cephstorage debian_6_0_9_system
rbd image 'debian_6_0_9_system':
        size 30720 MB in 7680 objects
        order 22 (4096 kB objects)
        block_name_prefix: rbd_data.199bc2eb141f2
        format: 2
        features: layering

Why is the striping feature missing in the clone? Is there a way to enable it 
on the cloned image? Does it even matter?

Best
Gerhard



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