Differential Backup Method Based on Duplicated Data Elimination
Zang Wen-juan · Jisuanji gongcheng · 2010
In order to eliminate the influence of duplicated data on transmission and storage,this paper proposes a differential backup method based on duplicated data elimination.By segmenting the block of file into several fixed size according to some interval and using Hash table to identify unique block,Rsync algorithm can detect duplicated data among different files.Local match is realized by segmenting Hash table.Differences transmission between different versions of files is realized by using local checksum file.Experimental results show that,compared with Rsync algorithm,the method can reduce the amount of data transmitted,decrease the disk capacity,and enhance the block search efficiency.