节点文献

虚拟机实时迁移中自适应阈值机制的研究

Research on Adaptive Threshold Mechanism in Live Migration of Virtual Machine

  • 推荐 CAJ下载
  • PDF下载
  • 不支持迅雷等下载工具,请取消加速工具后下载。

【作者】 崔勇林予松李润知王宗敏

【Author】 CUI Yong;LIN Yu-song;LI Run-zhi;WANG Zong-min;Institute of Information Engineering,Zhengzhou University;Henan Provincial Key Lab on Information Networking,Zhengzhou University;

【机构】 郑州大学信息工程学院郑州大学信息网络省重点开放实验室

【摘要】 虚拟化的数据中心主要采用预拷贝(Pre-copy)算法进行虚拟机实时迁移.当虚拟机中运行负载较高或者网络传输带宽较低时,预拷贝算法固定的停机阈值严重影响实时迁移的性能.针对这个问题,提出一种自适应停机阈值机制,根据之前各拷贝轮中脏页率构成的时间序列,首先利用动态指数平滑法来预测后轮的脏页率,在预测脏页率超过网络传输带宽的情况下,再采用Mann-Kendall检验模型对脏页率变化趋势进行判断,根据判断结果确定停机切换的时机.实验结果证明,采用基于自适应阈值机制的预拷贝算法能在高负载低延迟场景下有效提高实时迁移性能.

【Abstract】 Pre-copy is the dominant approach to carry out live migration of virtual machine. In the case of high workload in virtual machine and low network bandwidth,the fixed threshold setup for stop-copy in standard Pre-copy seriously degrades the performance of live migration. To address this problem,this paper proposes an adaptive threshold mechanism,which firstly predicts the dirty page rate of the next iteration by dynamic exponential smoothing when at the end of current iteration,then judges the changing trend of dirty page rate exploited with Mann-Kendall test model once the dirty page rate exceeds the network bandwidth,and finally figures out the time for stopcopy phrase according to the judgment result. Experiment results show that this optimized mechanism can effectively improve the performance of live migration under the condition of high workload and low network bandwidth.

【基金】 教育部博士点专项科研基金项目(20114101110007)资助;河南省科研重点项目(13A520562)资助;河南省创新人才项目(2011HASTIT003)资助
  • 【文献出处】 小型微型计算机系统 ,Journal of Chinese Computer Systems , 编辑部邮箱 ,2015年03期
  • 【分类号】TP302
  • 【被引频次】5
  • 【下载频次】133
节点文献中: 

本文链接的文献网络图示:

本文的引文网络