Snapshot reconstruction from an existing snapshot and one or more modification logs
US6981114B1 · kind B1 · utility
226Cited by
13References
25Claims
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Assignee
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Key dates
| Filing date | Oct 16, 2002 |
| Grant date | Dec 27, 2005 |
| Priority date | — |
| Expiry date | Jul 31, 2023 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F2201/84
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A deleted snapshot of a data volume may be reconstructed from an existing snapshot and one or more modification logs. For example, modifications to the data volume that occur subsequent to creation of a first snapshot may be logged in a modification log. If the first snapshot is deleted, the first snapshot may be reconstructed by modifying a second snapshot, created after the first snapshot, according to the modification log in order to undo any modifications made to the data volume prior to creation of the second snapshot and after creation of the first snapshot.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.