Cache consistency optimization
US9892041B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 30, 2014 |
| Grant date | Feb 13, 2018 |
| Priority date | — |
| Expiry date | Sep 19, 2035 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F2212/621
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
Various methods and systems for optimizing cache consistency are disclosed. For example, one method involves writing data to a file during a write transaction. The file is stored in a persistent storage device and cached in a non-volatile storage device. The method determines if an in-memory flag associated with the persistent storage device set. If the in-memory flag is not set, the method increases a generation count associated with the persistent storage device before a write transaction is performed on the file. The method then sets the in-memory flag before performing the write transaction on the file. In other examples, the method involves using a persistent flag associated with the non-volatile storage device to maintain cache consistency during a data freeze related to the taking of a snapshot by synchronizing generation counts associated with the persistent storage device and the non-volatile storage device.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.