“…When determining whether a host is underloaded, while considering its ℎ , it should also take its ℎ as a reference factor, because for the host with low ℎ and ℎ , its load is not only low at present, but also not likely to increase in a short time, so it should be shut down to save energy consumption. Based on this consideration, a host sorting index ℎ is given as (24), for host ℎ ,…”