多级增量与动态分块数据备份技术

lassic algorithm of incremental backup investigates the incremental source of file, picks out the different segments between the current file and the backup file, and only backups different segments. In this paper, based on this, we put forward the multistage incremental backup strategy and dynamic block partition. Multistage increment includes block increment on file level and file increment on global level. Dynamic block partition decides the length of the block according to the file feature dynamically in the implementation of the block increment on file level. Experimental analysis found that our techniques reduced redundant backup of same files in the backup global, at the same time, compressed data block fingerprint index, and improved the efficiency of file backup.