Improvement of Live Memory Migration Mechanism for Virtual Machine Based on Pre-copy

Aiming at longer time and memory pages repeated retransmission in the process of memory pre-copy,this paper optimizes the mechanism of memory pre-copy migration and uses Markov prediction model to improve the algorithm that reckon the working set of memory dirty page,designs an new algorithm that calculate working set of memory dirty page by forecasting the probability of dirty pages.This algorithm calculates probability of being modified next round of iteration using dirty pages history of the operation visits,only the memory pages with a lower probability can be translated.Experimental results show that new algorithm shortens the total time of migration and downtime,and effectively support dynamic migration of Virtual Machine(VM).