摘要
研究了虚拟机的实时迁移。对局域网内存迁移的预拷贝算法、后拷贝算法以及由这两种算法构成的混合拷贝算法的特性进行分析,在改进混合拷贝算法的基础上提出了基于等差划分的虚拟机实时迁移技术,该技术把第一轮传输的内存页划分成近似等差数列形式的多段,以减少第二轮传输的内存页。不同工作负载条件下的试验表明,与混合内存拷贝方式相比,基于等差划分的虚拟机实时迁移技术平均减少了25%的同步内存位图时间,29%的后拷贝方式发送的内存页以及2.2%的总迁移时间,在一定程度上提高了混合内存拷贝方式的虚拟机实时迁移性能。
The live migration of virtual machines was studied. The performances of the pre-copy algorithm, the post-copy algorithm and the hybrid-copy algorithm for memory migration in local area networks were analyzed, and then, on the basis of the improvement of the hybrid-copy algorithm, a technique for the live migration of virtual machines based on the division of arithmetic progression was presented. The technique divides the memory pages transmitted in the first round into many segments similar to the form of arithmetic progression, so the memory pages transmitted in the second round can be decreased. The experiments performed under different workloads showed that compared with the hybrid-copyalgorithm, the proposed technique reduced the time of synchronous memory bitmap by 25%, and decreased the pages of post-copy by 29% and the total migration time by 2.2% on average, improving and de- creased the performance of virtual machines＇ live migrationto some extent.
出处
《高技术通讯》
CAS
CSCD
北大核心
2016年第3期215-225,共11页
Chinese High Technology Letters
基金
国家自然科学基金(61003261)
国家科技支撑计划(2012BAH46B02)资助项目
关键词
实时迁移
虚拟机
预拷贝
后拷贝
混合拷贝
等差划分
live migration
virtual machine
pre-copy
post-copy
hybrid-copy
division of arithmetic progression
