- ``ceph osd reweightn`` will specify the `reweight` values for
multiple OSDs in a single command. This is equivalent to a series of
``ceph osd reweight`` commands.
- - ``ceph crush class {create,rm,ls}`` manage the new CRUSH *device
+ - ``ceph crush class {create,rm,ls,rename}`` manage the new CRUSH *device
class* feature. ``ceph crush set-device-class <osd> <class>``
will set the clas for a particular device.
- ``ceph mon feature ls`` will list monitor features recorded in the