Live Virtual Machine Migration based on Improved Pre-copy Approach
会议名称：《IEEE BEIJING SECTION(跨国电气电子工程师学会北京分会)》
会议日期：2010年
学科分类：08[工学] 081201[工学-计算机系统结构] 0812[工学-计算机科学与技术（可授工学、理学学位）]
基 金：supported by the National High Technology Research and Development Program of China 2006AA01Z121
关 键 词：virtual machine live migration improved pre-copy approach
摘 要：Live migration of virtual machine has attracted significant attention in recent *** facilitates system online maintenance,load balancing,fault tolerance and power *** pre-copy approach can balance the downtime and total migration time of contradictions,it will cap the number of copying iterations to the maximum number of iterations since the writable working set is not guaranteed to converge across successive iterations,especially when the VM is executing a largely read-intensive *** this paper,we improve the pre-copy approach on Xen *** add a bitmap page in our improved pre-copy approach,which marks those frequently updated *** the judge in the iteration process, we put those frequently updated pages into the page bitmap,and those pages can only be transmitted in the last round of the iteration *** can ensure that those frequently updated pages are transmitted just once in the iteration process. Experiment demonstrates that compared with pre-copy,our improved pre-copy approach can reduce 34%of total transferred data and 32.5%of total migration time total transferred data on *** importantly,our approach can complete the iteration process no more than 5 times.