Patent ID: 11880566
Assignee: HITACHI, LTD.
Field: Computer technology (Electrical engineering)
Classification: CPC G | IPC G

Claim 7:
8. A control method of a storage system including a plurality of storage control units, an accelerator, and a storage drive having a storage medium for storing data, wherein
each of the plurality of storage control units includes a processor and a memory,
metadata for accessing the data stored in the storage drive is held in a memory of a first storage control unit among the plurality of storage control units and a memory of a second storage control unit among the plurality of storage control units, and
the control method comprising the steps of:
when a write request for updating the stored data is received, a processor of the first storage control unit
performing, by a processor of the first storage control unit, a data amount reduction processing of the data to be updated,
updating, by a processor of the first storage control unit, by the data amount reduction processing, metadata related to the data to be updated, and
transmitting, by a processor of the first storage control unit, the updated metadata and a processing request for the updated metadata to the accelerator, and

storing, by the accelerator, the updated metadata in the memory of the first storage control unit and the memory of the second storage control unit based on the processing request for the updated metadata.