计算机工程与应用
計算機工程與應用
계산궤공정여응용
COMPUTER ENGINEERING AND APPLICATIONS
2013年
19期
254-259
,共6页
实时迁移%后拷贝%预拷贝%服务活跃度%脏页率%停止条件
實時遷移%後拷貝%預拷貝%服務活躍度%髒頁率%停止條件
실시천이%후고패%예고패%복무활약도%장혈솔%정지조건
live migration%Post-copy%Pre-copy%service live level%dirty page rate%stop condition
虚拟机实时迁移是在保证虚拟机服务正常运行的同时,在不同的物理主机之间迁移,为保证迁移效率和服务正常运行,需降低总迁移时间和停机时间。后拷贝和预拷贝是常用的两种实时迁移方案,后拷贝能降低总迁移时间,预拷贝能降低停机时间。基于服务活跃度的预拷贝优化方案是根据服务活跃度选择合适的停止条件,使得虚拟机在合适的临界点进入停机阶段,这不仅减少了页的迭代次数,也使停机阶段传输更少的页,从而达到同时降低总迁移时间和停机时间的目的。
虛擬機實時遷移是在保證虛擬機服務正常運行的同時,在不同的物理主機之間遷移,為保證遷移效率和服務正常運行,需降低總遷移時間和停機時間。後拷貝和預拷貝是常用的兩種實時遷移方案,後拷貝能降低總遷移時間,預拷貝能降低停機時間。基于服務活躍度的預拷貝優化方案是根據服務活躍度選擇閤適的停止條件,使得虛擬機在閤適的臨界點進入停機階段,這不僅減少瞭頁的迭代次數,也使停機階段傳輸更少的頁,從而達到同時降低總遷移時間和停機時間的目的。
허의궤실시천이시재보증허의궤복무정상운행적동시,재불동적물리주궤지간천이,위보증천이효솔화복무정상운행,수강저총천이시간화정궤시간。후고패화예고패시상용적량충실시천이방안,후고패능강저총천이시간,예고패능강저정궤시간。기우복무활약도적예고패우화방안시근거복무활약도선택합괄적정지조건,사득허의궤재합괄적림계점진입정궤계단,저불부감소료혈적질대차수,야사정궤계단전수경소적혈,종이체도동시강저총천이시간화정궤시간적목적。
The live migration of virtual machine is the migration between the different physical hosts, at the same time, ensuring the normal operations of the virtual machine service. In order to ensure the migration efficiency and the normal operation, it needs to reduce the total migration time and downtime. Post-copy and Pre-copy are both frequently used to live migration, Post-copy can reduce the total migration time, Pre-copy can reduce the downtime. This paper presents an optimization Pre-copy scheme based on service live level. According to the relationship between service and dirty page rate, selecting the appropriate stop condition, it makes the live migration enter the stop and copy phase in an appropriate critical point. This not only reduces the number of iterations of the page, but also transmits fewer pages in the stop and copy phase, so as to achieve the purpose of reducing the total migration time and downtime at the same time.