Implementing read/write, multi-versioned file system on top of backup data
US8489830B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 30, 2007 |
| Grant date | Jul 16, 2013 |
| Priority date | — |
| Expiry date | Mar 27, 2029 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F11/1464
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
Various embodiments of a computer system and methods are disclosed. In one embodiment, a computer system includes hosts coupled to a backup medium. The backup medium stores data segments and objects, each object referencing one or more segments. A second host conveys a write request to a first host identifying a data entity comprising segments referenced by a first object. The first host restores a copy of the data entity and creates a second object referencing the segments that were referenced by the first object in response to receiving the write request. The first host adds segment references to the second object in response to receiving a change that adds data to the copy or deletes a portion of a segment from the copy. The first host removes a segment reference from the second object if a change deletes all of a segment from the copy.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.