基于内存混合复制方式的虚拟机在线迁移机制

摘要

The live migration technology of virtual machine, fully leveraging virtualization' s flexibility and encapsulation abilities, is very helpful for dynamic workload balancing and flexible application deployment in the large-scale virtual machine environments. However, the existing live migration mechanisms have to be in the face of some problem, such as convergence of iteration, redundance of copying, and guest OS transparence. This paper discusses the application of combining memory pushing copy with on-demand copy approaches, and proposes a live migration mechanism based on hybrid memory copy approach, named HybMEC, in order to accelerate VM state migration. Base on KVM virtual machine monitor, we have implemented the HybMEC prototype system. The evaluation results under various VM workloads show that HybMEC is able to efficiently support VM live migration with lower resource consumption and latency, and to a-chieve significant improvements over existing mechanisms by the total migration time and the volume of data synchronized over the network.%虚拟机VM(Virtual Machine)在线迁移技术(Live Migration)充分利用虚拟化技术的灵活性和封装性,有利于实现大规模虚拟化环境中负载的动态调整以及应用的灵活部署.已有的在线迁移机制存在内存迭代收敛、迁 移数据冗余以及客户操作系统不透明等问题.文中结合内存推送复制以及按需复制两种方式,提出了基于内存混合复制方式的VM在线迁移机制HybMEC,以实现对VM运行状态的快速迁移.基于KVM虚拟机监控器,实现了HybMEC原型系统.多种不同类型应用负载下的实验结果表明,HybMEC能够高效地支持虚拟化环境中低开销、低延时的VM在线迁移,并在总迁移时间、内存同步数据量以及VM停机时间等方面具有显著的性能提升.