Using roll-forward and roll-backward logs to restore a data volume
US7620785B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 30, 2004 |
| Grant date | Nov 17, 2009 |
| Priority date | — |
| Expiry date | Oct 25, 2025 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F11/1474
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A roll-back memory can be used to incrementally restore one or more data volumes in reverse chronological order to the data state they occupied at some prior point in time without using a backup copy. After the one or more data volumes have been restored in reverse chronological order, a roll-forward memory can be used to incrementally restore the one or more data volumes in forward chronological order to the data state they occupied at some other point in time without using a backup copy. Incrementally restoring the one or more data volumes in reverse chronological order may follow an incremental restoration of the one or more data volumes in forward chronological order and vice versa until the one or more data volumes are in the data state they occupied just prior to, for example, a data corruption event.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.