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Pre-copy algorithm based on probability prediction could predict the probability of memory pages becoming dirty and avoid the repeated transfer a large number of dirty pages. However, when the dirty pages increase dramatically, prediction of probability will fail. To solve this problem, an Adaptive Bandwidth Algorithm is introduced in the pre-copy algorithm based on probability prediction. When dirty pages rate suddenly increases, that algorithm could improve the transmission bandwidth to shorten transmission time. Experiment al results show that the rate of dirty pages increase suddenly or is great, that strategy can improve the transmission bandwidth, shorten the total time of iterative transfer and downtime, so as to improve migration performance.

Improvement of Live Migration mechanism for Virtual Machine based on Pre-copy