Tiered storage system, computer using tiered storage device, and method of correcting count of accesses to file
US9933948B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Sep 14, 2016 |
| Grant date | Apr 3, 2018 |
| Priority date | — |
| Expiry date | Sep 14, 2036 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F3/0685
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
According to one embodiment, a tiered storage system includes a tiered storage device and a computer. The computer uses the tiered storage device, and includes a file system and a correction support unit. If an access request from an application is a write request to request overwriting of data, the file system executes a copy-on-write operation. The correction support unit causes the storage controller to carry over an access count manacled by the storage controller and associated with the logical block address of a copy source in the copy-on-write operation, to an access count associated with the logical block address of a copy destination in the copy-on-write operation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.