Data storage space recovery
US9817578B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 5, 2015 |
| Grant date | Nov 14, 2017 |
| Priority date | — |
| Expiry date | Jul 23, 2035 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F2212/7205
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
Storage space is reclaimed by cleaning and compacting data objects where data objects are stored by immutable storage. A storage area of which space needs to be reclaimed is identified. Active and stale data objects stored in a storage area are identified, and only active data objects are transferred to a shadow storage area from the storage area when recovering storage space. I/O operations can be fulfilled from the storage area and the shadow storage area. Compaction requests and I/O requests are throttled according to QOS parameters. Recovery of storage space does not cause a failure to meet performance requirements for any storage volume.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.