Deduplication storage system having garbage collection control method
US10866759B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Dec 11, 2018 |
| Grant date | Dec 15, 2020 |
| Priority date | — |
| Expiry date | Apr 1, 2039 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F12/0253
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A control device receives a first request signal for requesting to write first data in a first logical address area of a logical volume set stores the first data in a physical volume in accordance with the first request signal, erases, after receiving the first request signal, the first data in the first logical address area of the logical volume without erasing the first data in the physical volume, and when executing a first erasure processing for erasing the first data in the physical volume, holds the first data in the physical volume, in a case where history information for indicating that a second erasure processing has been executed prior to the first erasure processing is held, and erases the first data in the physical volume, in a case where the history information is not held.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.