Patent ID: 11954332
Assignee: HUAWEI TECHNOLOGIES CO., LTD.
Field: Computer technology (Electrical engineering)
Classification: CPC G | IPC G

Claim 0:
1. A data processing method, the method comprising:
adding, by a controller, an execution time to an IO request, wherein the execution time is used to instruct a storage device to complete the IO request before the execution time expires; and
sending, by the controller, the IO request to the storage device;
executing, by the storage device, the IO request based on the execution time of the IO request;
determining, by the controller, a type of the IO request;
wherein there are three types of the IO requests: a first type is an IO request generated externally by the server including the following types of an IO request generated by responding to an operation of a user by a host and an IO request corresponding to a value-added service of the server including snapshooting, cloning, replication being active-active and backup; a second type is an IO request correspond to a key service in the server including reading and writing of metadata; and a third type is an IO request corresponding to an array background task including cache brushing, hard disk reconstruction, and garbage collection; and
determining, by the controller, the execution time of the IO request based on the type of the IO request, wherein the storage device comprises a plurality of storage areas, each storage area comprises at least one storage block, the IO request is a write request, and the determining a storage block accessed by the IO request comprises:
selecting, by the storage device, a storage area in which no erase operation is performed from the plurality of storage areas; and
determining, by the storage device and based on the selected storage area, the storage block accessed by the IO request, and
wherein each storage block comprises a plurality of sub-blocks, each sub-block is a minimum unit on which the erase operation is performed, each storage area supports a read+write mode and a read+erase mode, and when the storage area is used to write data, the storage area is set to the read+write mode; when the storage area is used to perform the erase operation, the storage area is set to the read+erase mode; and the selecting a storage area in which no erase operation is performed from the plurality of storage areas comprises:
selecting a storage area in the read+write mode from the plurality of storage areas;
determining whether a quantity of idle sub-blocks in the selected storage area is less than a threshold; and
when the quantity of idle sub-blocks in the selected storage area is not less than the threshold, using the selected storage area in the read+write mode as the storage area in which no erase operation is performed.