Storage system and data replication method in storage system
US10963485B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 18, 2020 |
| Grant date | Mar 30, 2021 |
| Priority date | — |
| Expiry date | Sep 18, 2040 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F16/184
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
The operational performance and the I/O performance of Snapshots in a storage system are balanced. In a storage system, meta information of data appended to a log structured area is composed of meta information of a first tier and meta information of a second tier which correlate location information of data in a logical volume and location information of data in the log structured area. When creating a snapshot of the logical volume, a data management unit creates, in the same meta information area as a replication source, a replication of the meta information of the first tier stored in a plurality of meta information areas assigned to a plurality of controllers. A data control unit accesses the data of the log structured area from the logical volume, and accesses the data of the log structured area from the snapshot.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.