'Add tasks that need to be executed at a fixed interval.'

def _add_looping_tasks(self):

    self._update_ssc()
    self.loopingcalls.add_task(self._update_ssc, loopingcalls.ONE_HOUR, loopingcalls.ONE_HOUR)
    self.loopingcalls.add_task(self.zapi_client.remove_unused_qos_policy_groups, loopingcalls.ONE_MINUTE, loopingcalls.ONE_MINUTE)
    self.loopingcalls.add_task(self._handle_housekeeping_tasks, loopingcalls.TEN_MINUTES, 0)
    super(NetAppBlockStorageCmodeLibrary, self)._add_looping_tasks()
