A Survey on Dynamic Energy Management at Virtualization Level in Cloud Data Centers

Data centers have become indispensable infrastructure for data storage and facilitating the development of diversified network services and applications offered by the cloud. Rapid development of these applications and services imposes various resource demands that results in increased energy consumption. This necessitates the development of efficient energy management techniques in data center not only for operational cost but also to reduce the amount of heat released from storage devices. Virtualization is a powerful tool for energy management that achieves efficient utilization of data center resources. Though, energy management at data centers can be static or dynamic, virtualization level energy management techniques contributes more energy conservation than hardware level. This paper surveys various issues related to dynamic energy management at virtualization level in cloud data centers.