Switching roles between a production storage device and a snapshot device
US7636823B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 27, 2006 |
| Grant date | Dec 22, 2009 |
| Priority date | — |
| Expiry date | Nov 30, 2027 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F11/1466
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A snapshot manager switches the roles of a production storage device and a corresponding snapshot device by modifying read and write requests to the devices. Thus, translation mapping information concerning the acting snapshot device does not change, so a remote computing device can perform a backup from the acting snapshot without having to restart every time content is written to the production device. After the backup operation, the snapshot manager can update the underlying data source from the acting production device to capture writes to production that occurred during the backup. The snapshot manager then reverts the roles of the storage device and the snapshot to normal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.