Application of Data Deduplication Technology for Data Backup System in Disk

Data backup is the last defense line to guarantee the high availability of data.Errors are easy to occur in the tape backup,as a result,it is difficult to complete the data recovery because of the damage in tape medium.The technique of disk backup is the one by utilizing disk array as underlying data storage,and making the disk array as a tape library by using a virtual software.Aiming at deleting redundant backup data,making sure the same data message saved only one time,decreasing the demand for storage,and holding more data with less space,the technique of data deduplication in disk could realize the significant improvement,obviously reduce the time of data backup and recovery,thus to meet the requirement of high-performance backup,and guarantee the restorability of backup data.On the basis of comparison between tape backup and disk backup,this paper introduces the data deduplication technique and its application in data backup system.