Temperature Balancing among Servers with Workload Distribution

Power and energy consumption of datacenters has become a serious concern in recent years, because of their contribution to cost, design and reliability constraints, and environmental concerns.According to a report from EPA, the total energy consumption from datacenters in the United States was over 100 billion kWh in 2011, and cooling part has taken the second place, which is 29% in the power usage of a typical data center.In order to decrease the power consumption of a datacenter, it is preferable to balance the temperatures of each server as close as possible.For its sake, in this paper we need to balance the temperatures of the servers in a datacenter to make sure that the power consumed by the cooling system can stay in a relatively low level.In this case, we do not turn on the cooling system until the temperatures for all the servers are higher than the threshold.