摘要
Pre-Copy算法策略采用仅仅比较相邻两轮传递页位图和跳过页位图的方式来判断内存页是否需要复制传递。优化之后的Pre-Copy算法策略是根据所有记录的内存页修改次数来判定脏页,当达到某个定义的脏页的阈值时,即进行复制重传。实验结果表明,在高CPU负载、高内存负载和高网络负载的情况下,Pre-Copy算法的优化策略,缩短了虚拟机动态迁移的停机时间和总迁移时间,提高了虚拟机动态迁移的效率。
Pre-Copy algorithm only two rounds of adjacent transfer bitmap and skip pages bitmap way to judge whether memory pages need to be copied. After optimization of the Pre- Copy algorithm based on all the records to judge dirty pages, the number of pages to modify when reach a certain threshold of dirty pages defined, namely to reproduce the retransmission. The experimental results show that the high CPU load, memory load and high network load conditions, the adaptive optimization algorithm of the Pre- Copy, shortens the virtual machine live migration of downtime and total migration time, improve the efficiency of the virtual machine live migration.
出处
《电脑知识与技术》
2015年第11X期149-151,共3页
Computer Knowledge and Technology
关键词
虚拟机
动态迁移
策略
优化
virtualization
live migration
strategy
optimization
