Review on Energy Aware Virtual Machines Consolidation in Data Centers of Cloud

the numbers of datacenters are increasing with the use of cloud services. Datacenters are actually hazardous to the environment because of high energy usage and increase in carbon emission. Energy efficiency in datacenters is major issue in cloud computing, it will lead to improve physical infrastructure of modern datacenters through energy management and resource utilization. It is quint essential to reduce energy in delivery of computing resources and utilization of resources to serve application workload. Dynamic virtual machine consolidation is effective way to reduce energy consumption and better utilization of resources. The VM consolidation ensures that computing resources are efficiently utilized to serve applications workload so as to minimize energy consumption while maintaining the required QoS. VM consolidation determines in four sub problem like host overload/ under load detection, VM selection, VM placement to reduce overall energy consumption.