Xen虚拟机现有迁移机制中,源主机和目的主机需要连接共享存储服务,共享存储是动态迁移的必要条件。针对这一局限性提出了一种包括外存迁移在内的动态增量迁移方法,可以在动态迁移过程中,把虚拟机磁盘文件从源主机迁移至目的主机,从而降低了动态迁移的成本,扩大了动态迁移的应用范围。并通过实验进行了性能分析。

The existing migration mechanism calls for a shared storage service between the source host and the destination host,which is a necessary condition for dynamic migration.This paper proposes a dynamic incremental migration including external memory based on Xen virtual Machine,by analyzing the principles and limitations of the existing migration mechanisms.This approach makes the migration between physical hosts do not rely on shared storage any more,and widens the scope of migration technology.Performance analysis and experiment results show that the approach is feasible.