Method and apparatus for automatic snapshot
US8370591B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 13, 2009 |
| Grant date | Feb 5, 2013 |
| Priority date | — |
| Expiry date | Nov 28, 2030 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F11/1461
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A method for automatic snapshot includes obtaining the amount of data written into a source Logical Unit Number (LUN) and performing increment accumulation; and taking a snapshot when a value of the increment accumulation exceeds the upper limit value. An apparatus for automatic snapshot is disclosed. In one embodiment of the invention, snapshots are taken according to the size of a data variable, only two characterizing parameters, an upper limit value and an increment value need to be added, and the determination logic is clear and concise. Thus, system efficiency or resource overload is not affected, the pertinence is strengthened, the resource usage is increased, and the adaptability is strengthened. Furthermore, stored data may be automatically protected with snapshot, and data safety and reliability are greatly improved.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.