| 摘要 |
Embodiments disclosed herein related to a virtual machine-based on-demand parallel disaster recovery system and a method thereof. By integrating context of processes of virtual machine, the system and method build a process tree related to applications and support the operation of freezing the context and intercept memory image consistent with the virtual machine environment, based on which, a method for on-demand parallel recovery is provided. In the method, while monitoring file system data that processes of virtual machine are to visit by a kernel intercept unit, recovery of related data blocks of the applications is conducted in the background in order to make applications and recovery procedure of the virtual machine run simultaneously. The recovery procedure is divided into two phases, recovering memory image first and then recovering file system or volume data. Through the procedure, applications can be recovered precisely to the running state when they are backup. The method realizes the scheduling of multiple backup tasks and recovery tasks in client and realizes the prefetching of the recovered data. The embodiments described herein consume less time for recovery, enhances the reliability of the protected applications, has a low cost and practical value; and it is transparent to users.
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