Ceph » CephFS

$ ./bin/ceph fs subvolume create
Invalid command: missing required parameter vol_name(<string>)
fs subvolume create <vol_name> <sub_name> {<int>} {<group_name>} {<pool_layout>} {<mode>}

An 'int' is displayed wherever CephInt is given.

$ ./bin/ceph fs subvolume rm
Invalid command: missing required parameter vol_name(<string>)
fs subvolume rm <vol_name> <sub_name> {<group_name>} {--force}

Here the prefix '--' is displayed for force. But not displayed for any other options.