Database backup method based on linear-chain Delta compression
基于线性链式Delta压缩的数据库备份方法*

This paper proposed a version transformation algorithm of Delta files in order to reduce the time cost of restoring data in linear Delta chain. On the basis of the algorithm,presented a database backup and restore method based on linear-chain Delta compression. Comparing to the commonly used backup method based on version jumping Delta chain, this method had the advantages of less storage cost and less network transmission cost. The experimental results indicate that the method can reduce the storage cost at the ratio of about 80% with respect to version jumping Delta chain, and the time cost of the method is only about 40% of the traditional restore method.