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

Claim 3:
4. A disaster recovery site, wherein the disaster recovery site comprises:
a memory storing instructions; and
a processor coupled to the memory to execute the instructions to:
select a first backup copy when taking over a service of a production site;
receive service data;
obtain 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
send a first message to the production site, wherein the first message comprises the CBT information; and wherein a storage server in the disaster recovery site and a storage server in the production site are heterogeneous devices.