Backup method on a hierarchical backup system
US6965976B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 4, 2003 |
| Grant date | Nov 15, 2005 |
| Priority date | — |
| Expiry date | Dec 24, 2023 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F11/1456
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
If a failure occurs in a certain layer of a conventional hierarchical backup system, the lower layers are also affected by the failure. If, for instance, a failure occurs in the second layer, a backup process cannot be performed in the third layer so that an improper backup results in the fourth layer.When a failure occurs in a certain layer of a hierarchical backup system of the present invention, the influence of the failure is minimized by causing a lower layer to substitute for the layer where the failure exists, by making backups skipping the layer where the failure exists, or by reducing the backup intervals for the lower layers.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.