System and method for determining changes in two snapshots and for transmitting changes to a destination snapshot
US7818299B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 2, 2009 |
| Grant date | Oct 19, 2010 |
| Priority date | — |
| Expiry date | Sep 2, 2029 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S707/99954
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A method for backing up a computer file system is disclosed. A first snapshot of the file system is generated at a first time, the first snapshot having first pointers to data blocks of the file system at the first time. A network adapter receives storage operations to write new data to the file system. A second snapshot of the file system is generated at a second time, the second snapshot having second pointers to data blocks of the file system at the second time, the data blocks at the second time including the new data. The first pointers to the second pointers are compared. In response to the second pointers differing from the first pointers, data of the file system which have been changed between the first snapshot and the second snapshot are copied to a backup copy of the file system.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.