Changing a project encryption key changes the key for shares that inherit the key from the project. You can change the encryption key associated share at any time, even while it is in use by client systems. To change the key for a project, use the following procedure:
hostname:shares> select default
hostname:shares default> get keyname
keyname = MyFirstKey
hostname:shares default> set keyname=MySecondKey
keyname = MySecondKey (uncommitted)
hostname: shares default> commit.
shares default> get keyname
keyname = MySecondKey