A Remote File Fast Synchronization Method

Fast synchronization for remote file is widely used in many scenarios such as file system backup and restore, web mirroring, etc. A new method for remote file fast synchronization is proposed. The file state difference set is calculated at client end. The difference synchronization and rename optimization are achieved by replaying the file state difference set at server end. The generation, replay and optimization methods for the file state difference set are given. The experimental results indicate that this method offers signficant improvement over rsync. The network traffic of file content synchornization decreases remarkablely. And the network traffic of rename optimization is KB-level and independent of file length.