Deduplicated data block ownership determination
US10996853B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 30, 2019 |
| Grant date | May 4, 2021 |
| Priority date | — |
| Expiry date | Nov 5, 2039 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F16/215
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
Techniques for determining unique ownership of data blocks includes selecting a first data block referenced by a first logical address of a first logical device, wherein first metadata for the first data block includes a reference count and a result used in determining sole unique ownership of the first data block; determining C1, an expected value of the result of the first metadata when the first logical device is a sole unique owner of the first data block; and performing first processing that determines whether the first logical device is the sole unique owner of the first data block. The first processing includes: determining whether C1 equals a current value of the result of the first metadata; and determining that the first logical device is the sole unique owner of the first data block if C1 equals the current value of the result of the first metadata.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.