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As most clouds are based on virtualization technology, more and more virtual machine images are created within data centers. Depending on the need of disaster recovery, the storage space used for backup would easily sprawl to a TB or PB level with the growth of images. Unfortunately, different images have a large amount of same data segments. Those duplicated data segments will lead to serious waste of storage resource. Although there is a lot of work focus on deduplication storage and could achieve a good result in removing duplicate copies, they are not very suitable for virtual machine image deduplication in a cloud environment. Because huge resource usage of deduplication operations could lead to serious performance interference to the hosting virtual machines. This paper propose a local deduplication method which can speed up the operation progress of virtual machine image deduplication and …