基于动态调整阈值的虚拟机迁移算法

摘要

Aiming at the optimization of servers' energy consumption in data center and the reasonable migration time of Virtual Machine (VM),a VM migration algorithm based on Dynamic Adjusting Threshold (DAT) was proposed.Firstly,the migration threshold was dynamically adjusted by analyzing the historical load data acquired from Physical Machine (PM),then the time for migrating VMs was decided by the delay trigger mechanism and the PM load trend prediction.The VM migration algorithm based on DAT was tested on datacenter platform in the laboratory.Experimental results indicate that compared with the static threshold method,the number of the shut down PMs of the proposed algorithm is larger,and the energy consumption of the data center is lower.The VM migration algorithm based on DAT can dynamically migrate VMs according to the variation of PM load,thus improving the utilization of resources and the efficiency of VM migration,reducing the energy consumption of the data center.%针对当前数据中心服务器能耗优化和虚拟机迁移时机合理性问题,提出一种基于动态调整阈值(DAT)的虚拟机迁移算法.该算法首先通过统计分析物理机历史负载数据动态地调整虚拟机迁移的阈值门限,然后通过延时触发和预测物理机的负载趋势确定虚拟机迁移时机.最后将该算法应用到实验室搭建的数据中心平台上进行实验验证,结果表明基于DAT的虚拟机迁移算法比静态阈值法关闭的物理机数量更多,云数据中心能耗更低.基于DAT的虚拟机迁移算法能根据物理机的负载变化动态迁移虚拟机,达到提高物理机资源利用率、降低数据中心能耗、提高虚拟机迁移效率的目的.