Patent ID: 11947429
Assignee: HUAWEI TECHNOLOGIES CO., LTD.
Field: Computer technology (Electrical engineering)
Classification: CPC G | IPC G

Claim 0:
1. A data disaster recovery method, wherein the method is applied to a disaster recovery system, the disaster recovery system comprises a production site and a disaster recovery site, and the method comprises:
selecting, by the disaster recovery site, a first backup copy when taking over a service of the production site;
receiving service data;
obtaining changed block tracking (CBT) information based on the received service data by generating N snapshots and obtaining difference information between each of the N snapshots and a previous snapshot of each of the N snapshots, wherein N is greater than or equal to 2 and the CBT information comprises the difference information, wherein the CBT information comprises incremental information generated after the disaster recovery site receives the first backup copy; and
sending, by the disaster recovery site, a first message to the production site, wherein the first message comprises the CBT information; wherein
a storage server in the disaster recovery site and a storage server in the production site are heterogeneous devices.