Abstract:

The authors introduced cloud computing into data backup area, designed and implemented a hadoop distributed file system(HDFS)
 based data backup system, which  meets users’ needs of data backup/restore by applying existed cheap computers to setting up a data b
ackup cluster. By means of  the strategies of deviding users into groups, of packaging and uploading small files and of restoring first, the system’s performance is enhanced. HDFS based data backup system designed in this paper has the strengths in security, expansibility, economy, and reliability.

Key words: cloud computing, cloud storage, backup system