Patent ID: 11907078
Assignee: HUAWEI TECHNOLOGIES CO., LTD.
Field: Computer technology (Electrical engineering)
Classification: CPC G | IPC G

Claim 11:
12. A file server comprising:
a network interface for accessing a network;
a memory storing executable instructions; and
a processor configured to execute the executable instructions to:
receive, from a backup server, a snapshot request;
send, to the backup server, a snapshot creation success response comprising a snapshot identifier of a second snapshot;
receive, from the backup server, a change information obtaining request requesting for change information of data in the file server;
determine the change information of the data in the file server;
return a record of a data change between the second snapshot and a first snapshot to the backup server, wherein the first snapshot is created before the second snapshot, the data change record is used to record information about a data block corresponding to the data change between the second snapshot and the first snapshot, and the data change record includes identification information of the data block corresponding to the data change;
receive a data obtaining request sent by the backup server, wherein the data obtaining request includes identification information of a to-be-obtained data block; and
return, to the backup server, data in the to-be-obtained data block.