Method and apparatus for file system snapshot persistence
US7440966B2 · kind B2 · utility
129Cited by
16References
23Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 12, 2004 |
| Grant date | Oct 21, 2008 |
| Priority date | — |
| Expiry date | Oct 21, 2025 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S707/99945
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A method, apparatus, and computer instructions for managing data in a file system in a data processing system. A request to modify a data block in the file system is detected during file system recovery time. In response to detecting the request, metadata is written to describe the data block into a snapshot image. The data is copied for the data block in the file system to the snapshot image. The data block is modified in the file system after the data is copied into the snapshot image. The snapshot image may be used to return the file system to a state prior to modifying the data block in the file system.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.