Method and system for data recovery in a continuous data protection system
US7325159B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 4, 2004 |
| Grant date | Jan 29, 2008 |
| Priority date | — |
| Expiry date | Feb 18, 2025 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F2201/855
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
In a continuous data protection system having a primary volume and a secondary volume, a method for data recovery begins by selecting a snapshot of the primary volume to be recovered and a location on which the snapshot is to be loaded. A point in time (PIT) map is created for the selected snapshot, and the selected snapshot is loaded at the selected location. A data block from the PIT map is resolved to determine which block on the secondary volume is presented as being part of the snapshot. The snapshot is accessed via a host computer as if the snapshot was the primary volume at an earlier point in time, corresponding to the time of the selected snapshot.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.