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Disk Migration Technology of Virtual Machine Based on Redirect-on-Write Mechanism
Author(s): 
Pages: 101-105
Year: Issue:  23
Journal: Video Engineering

Keyword:  virtual machinedisk migrationredirect-on-writedata compression;
Abstract: 针对虚拟机磁盘迁移耗时长、数据迁移量大的难题,提出了基于写时重定向的虚拟机磁盘迁移技术,并与预迁移机制及数据压缩算法相结合完成虚拟机的全系统迁移.在磁盘预迁移阶段,通过将磁盘写请求重定向来实现磁盘原始数据和新写入的数据的隔离,对更新数据压缩后再传输到目标节点,以达到减少同步冗余数据量的目的.实验证明,该方法能够很好地完成虚拟机的全系统迁移,尤其在低负载情况下执行得更好.其中,更新数据的迁移量减少60%以上,迁移时间缩短17%.
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