Energy consumption is becoming a matter of concern in cloud computing. Energy consumption by cloud data centers is increasing day by day which leads to the need of green cloud computing solutions. The servers used in cloud data centers are main cause of high energy requirements. Servers in the data centers consume much energy even when they are in idle state. So the basic idea is to switch the servers to sleep mode when they are not used to save energy. This review paper discusses several methods that lead maximum utilization of servers and cause more number of servers to sleep mode.
Cloud data centers, Green computing, Migration, Virtualization, Sleep mode, Energy consumption
