File system for providing access to a snapshot dataset where disk address in the inode is equal to a ditto address for indicating that the disk address is invalid disk address
US7216135B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 15, 2002 |
| Grant date | May 8, 2007 |
| Priority date | — |
| Expiry date | Apr 14, 2025 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S707/99956
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A system, method and computer readable medium for providing dynamic links to file system snapshots is disclosed. A link corresponding to a file system inode is generated. Upon activation of the link, the snapshot identifier of the most recent snapshot is retrieved and the most recent snapshot is identified. If the most recent snapshot includes an inode corresponding to the file system inode and the file system inode includes a disk address, then the data block referenced by the disk address is retrieved. If the most recent snapshot includes an inode corresponding to the file system inode and the file system inode includes a ditto disk address (or the inode corresponding to the file system inode is not included), then the inode corresponding to the file system inode indicated in the link is retrieved and the data block corresponding to the file system inode is retrieved.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.