提出并实现了一种在异地容灾系统中的快速灾难恢复方法。通过快速数据恢复和数据更新两步完成数据恢复,其中快速数据恢复采用差异拷贝恢复技术实现;数据更新采用对基于磁盘块的增量备份进行写重放来实现。该方法的实现使得灾难恢复的速度快、网络负载小、系统服务的丢失少。
A method on quick disaster recover in disaster-tolerant system is presented and realized. The technologies of quick data recover and data update are adopted. The way of quick data recover uses the method of differential copy while disk-based incremental backup technique is used to realize data update. In all, this quick disaster recover method can quicken the speed of disaster recover, decrease network payload and reduce the loss of system service.