Migration in virtual resource management

Large-scale data centers, the workload in each node changes dynamically over time, causing the imbalance of workload, so the workload in some machines may exceeds the threshold, which not only can´t guarantee the quality of service requirements (QoS), may also waste resources. This paper designs a resource manager based on migration cost, resource utilization and the number of machines, which develops relevant migration policy for virtual machine migration. The manager is divided into two stages. The initial phase will decide the virtual machines (VM) which should be migrated. The goal is to meet QoS, maximize resource utilization and minimize migration overhead. The second phase develops migration program to resolve the issue of where to move to. The target is to improve resource utilization and reduce the number of machines. Simulation results verify the superiority and rationality of this resource manager.