A Review on Dynamic Consolidation of Virtual Machines for Effective Energy Management and Resource Utilization in Data Centres of Cloud Computing

Virtual Machine Consolidation (VMC) is one of the key instruments of structuring a dynamic energy effective management framework for cloud resources. It is established on the fact that migration of Virtual Machines (VMs) onto a lesser number of Physical Machines (PMs) can increase the use of servers and correspondingly decrease the energy utilization of the data centres. In any case, packing a bunch of VMs into an individual server may degrade the rate of Quality of Service (QoS), since VMs share the underlying resources of server. To rectify this issues VMC algorithms are developed for dynamic selection of VM for migration taking into account the QoS along with the objectives of optimization. VMC is one of the NP-Hard issues and henceforth a broad range of meta-heuristic and heuristic algorithms for VMC has been recommended whose main objective is to accomplish optimality. Since VMC is a prominent subject of research, plenty of scientists are currently working on it. This paper reviews some of their techniques that propose to manage energy effectively.