Multi-way checkpoints in a data storage system
US9767120B2 · kind B2 · utility
0Cited by
29References
31Claims
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Assignee
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Key dates
| Filing date | Jun 30, 2008 |
| Grant date | Sep 19, 2017 |
| Priority date | — |
| Expiry date | Nov 7, 2031 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F11/1448
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
Embodiments of the present invention allow multiple checkpoints to be taken so that multiple versions of the filesystem, including a working version and at least two checkpoint versions, can be maintained over time. Specifically, at least three “superblock” root structures are used to manage multiple instantiations of the filesystem. The superblocks are preferably stored in fixed locations within the storage system for easy access, although they may alternatively be stored in other ways. The number of superblocks may be fixed or variable.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.