Comparative Study of Virtual Machine Migration Techniques and Challenges in Post Copy Live Virtual Machine Migration

Cloud computing is the emerging service provider used to manage computing resources like networks, storage, servers, applications and services which requires optimum effort of management [1]. Virtualization in cloud computing is gaining more importance today due to lack of proper utilization of resources, improper load balancing of processing nodes, lesser isolation of applications, extent of tolerating the faults in virtual machines, to increase the portability of nodes and to rise the efficiency of cost of the physical server. So, migration is one of the most important features of virtual machines technology [2]. Virtual machine migration is the migration of virtual machine from one physical host to another [1]. It is mainly done via two approaches pre copy migration and post copy migration. Pre copy migration first transfers the memory and then transfers the execution while post copy migration first transfers the execution and then transfers the memory [7]. The main motive of this paper is to provide the better understanding of post copy virtual machine migration technique research challenges by comparing existing general & network aware virtual machine migration techniques in cloud computing.