Performance enhancement in live migration for cloud computing environments

Live migration of virtual machines is an important component of the emerging cloud computing environments. Migrating operating system instances across distinct physical hosts is a useful tool for administrators of data centres and clusters. Hence, a key issue in live migration is the total migration time and the downtime. To improve the performance of live migration, an optimized iterative pre-copy algorithm is used to reduce the dirty rate of VM. WSClock page replacement algorithm has been proposed along with traditional pre-copy approach that includes pre-processing phase for reducing the amount of transferred memory page and total migration time.