A Rapid Recovery Method for Block-Level CDP Systems

In this paper, we propose a new rapid recovery method for continuous data protection (CDP) system to solve the problem in traditional CDP system that it takes large amount of time to recover to any point in time. The proposed method could be called by the technique of back-link based recovery on demand. After discussing the data structure of new method and introducing the concept of back-link based on the pointers in the data structure, we have developed and constructed the new rapid recovery algorithms. The test has been implemented by using typical workload trace data. Experimental result shows that, when the recovery point is near the current time point, the rapid recovery method can present the temporary disk image with little loss of response time.