International Journal of Computer Science and Network
Cloud computing is offering utility-oriented IT services to users worldwide. Based on a pay-as-you-go model, it enables hosting of pervasive applications from consumer, scientific, and business domains. In recent years, energy efficiency has emerged as one of the most important design requirements for modern computing systems, such as data centers and clouds, as they continue to consume enormous amounts of electrical power, contributing to high operational costs and carbon footprints to the environment. The virtualization technology has advanced the area by introduction of a very effective power saving technique.