Data migration for composite non-volatile storage device
US9710397B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 6, 2012 |
| Grant date | Jul 18, 2017 |
| Priority date | — |
| Expiry date | Sep 6, 2032 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F2212/217
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
Approaches to managing a composite, non-volatile data storage device are described. In one embodiment, a method for managing a composite storage device made up of fast non-volatile storage, such as a solid state device, and slower non-volatile storage, such as a traditional magnetic hard drive, can include maintaining a first data structure, which stores instances of recent access to each unit in a set of units in the fast non-volatile storage device, such as the SSD device and also maintaining a second data structure that indicates whether or not units in the slower storage device, such as the HDD, have been accessed at least a predetermined number of times. In one embodiment, the second data structure can be a queue of Bloom filters.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.