Jazz9 commented on issue #2650: Ceph RBD Feature flag update
URL: https://github.com/apache/cloudstack/issues/2650#issuecomment-390063811
   Per per dev mailing list discussion with Wido. This following code controls 
the feature set.
   private int rbdFeatures = (1 << 0); /* Feature 1<<0 means layering in RBD 
format 2 */
   rbd.clone(template.getName(), rbdTemplateSnapName, io, disk.getName(), 
   rbdFeatures, rbdOrder);
   I would suggest that we create a global setting that controls the feature 
   1. Default -1 to not specify any flags to rbd.clone. This should choose the 
defaults for the current version of Ceph.
   2. Specify a number the enable that feature code. ( 
https://ceph.com/geen-categorie/ceph-enable-the-object-map-feature/ )

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