Data Organization and Quick Indexing Technologies in Disk-based Network Backup
The ultimate purpose of data backup is the ability of retoring data as soon as possible when disaster happens.Shortening the time taken by restore is the essence of enhancing the performance and value of the whole backup system.Taking the thought of ultimate purpose of data backup,we organize and search backup data effectively by using a method of tape simulated and stratified organization of backup data and the stratified index mechanism on the basis of this kind of organization.By using the both two technologies,the performance of backup could be improved gradually when the size of backup data increase and finally comes to a stable state.The performance of restore is improved significantly while there is a little loss of performance of backup as the price,but when the size of backup data is increasing,this kind of performance loss of backup will descend,while the restore performance will keep stable,so the performance and the value of the whole backup system is improved.