A comparative study into energy efficient techniques for Cloud computing

Digital revolution led to shift from the industrial age to ICT age. Cloud computing is one of the important innovation of the digital revolution. It is a new paradigm for hosting and delivering services using standard protocols of the Internet. It also provides the capability to utilize scalable, distributed computing environments within the confines of Internet with minimal management effort while keeping a single coherent system view. Last few decades are witness of fast growth in demand of high computing power. The trend in demand of computing power caused the establishment of large-scale data centers that are situated at geographically apart locations. The consumption of electrical energy by these large scale data center causes high operating cost and releases large amount of CO₂. We present comparative study among various optimized resource utilization techniques to mitigate the problems such as resource underutilization, high energy consumption, and large CO₂ emissions.