Transactional virtual disk with differential snapshots
US8805788B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 4, 2009 |
| Grant date | Aug 12, 2014 |
| Priority date | — |
| Expiry date | May 9, 2030 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F2201/815
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
Some embodiments provide a system that provides a virtual disk in a computer system. During operation, the system stores data for the virtual disk in a virtual disk file on the computer system. Next, the system loads a differential location data structure corresponding to a snapshot of the virtual disk into memory on the computer system and processes input/output (I/O) operations to the virtual disk using the differential location data structure and the virtual disk file. Finally, the system periodically generates a new snapshot of the virtual disk by transactionally committing changes made to the differential location data structure by the I/O operations to the virtual disk file.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.