def get_statistic(self):
stat = Operator.get_statistic(self)
dht_range = self.get_dht_range()
stat['status'] = self.status
stat['range_start'] = '%040x'% dht_range.get_start()
stat['range_end'] = '%040x'% dht_range.get_end()
stat['range_size'] = dht_range.get_range_size()
stat['replicas_size'] = dht_range.get_replicas_size()
stat['free_size'] = dht_range.get_free_size()
return stat
