Green Cloud Computing

Cloud computing is emerging as a critical information communication technology to heavily impact our daily life in the future. As computing becomes increasingly pervasive, the energy consumption attributable to computing is climbing that marked the foundation of Green Computing. Green Cloud is an Internet Data Canter architecture which aims to reduce data canter power consumption, and at the same time guarantee the performance from users' perspective, leveraging live virtual machine migration technology. Saving energy or reduction of carbon footprints is one of the aspects of Green Computing. Green Cloud Architecture enables comprehensive online monitoring, live virtual machine migration and VM placement optimization. A Green Cloud System responds to peak utilization periods and adjusts availability of resources based on them expanding or shrinking the cloud as needed. The aim of this paper is a literature study of the challenges and various issues in field of Green Computing and discusses the future scope of Green Clouds. I.INTRODUCTION Green Clouds combines and scatter excess cloud capacity.The cloud platform of Green Clouds reacts to the speedy increasing, prerequisite for adjustable quantity on one hand, and large number of wasted in reserve on other.Green Clouds emerges as a solution to save power by utilizing server consolidation and virtualization technologies.Fine tuning resource utilization can reduce power consumption.Cloud computing platform is the next generation IT infrastructure that enables enterprises to consolidate computing resources, reduce management complexity and speed the response to business dynamics.Improving the resource utilization and reduce power consumption are key challenges to the success of operating a cloud computing environment.To address such challenges, we design the Green Cloud architecture.The Green Cloud Architecture is a flexible architecture with offline configuration and server implemented clones.The Green Cloud Architecture includes the Green Broker that analyses user requirements.It calculates cost and carbon footprint of services and carbon aware scheduling, The Green Offer Directory lists services with their discounted prices and green hours and The Carbon Emission Directory contains data on Power Usage Effectiveness, cooling efficiency, carbon footprint, network cost.It helps user to select cloud services with minimum carbon footprint.The Green Cloud Architecture enables comprehensive online monitoring, live virtual machine migration, and VM placement optimization.The Green Cloud Architecture infers a concern over the structure and the social responsibility of energy consumption so aiming to insure infrastructure sustainability without breaking contracts.Therefore, the Green Cloud architecture reduces unnecessary power consumption in a cloud computing environment.Green Cloud architecture, help consolidate workload and achieve significant energy saving for cloud computing environment, at the same time, guarantees the real-time performance for many performancesensitive applications.Organizations are realizing that the sources and amount of their energy consumption significantly contributes to greenhouse gas (GHG) emissions.In response to this awareness, organizations are currently using the following equation: Reduced Energy Consumption = Reduced Green House Gas Emissions = Reduced Operational Costs for the data center and business [1].A typical data center consumes energy in four basic areas: (i) Critical Computational Systems that is servers, network and storage.(ii) Cooling Systems.(iii) Power conversion such as Power Distribution Units and (iv) Hoteling.