Producing a mirrored copy using incremental-divergence
US6728898B2 · kind B2 · utility
32Cited by
17References
56Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 6, 2002 |
| Grant date | Apr 27, 2004 |
| Priority date | — |
| Expiry date | Mar 6, 2022 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F11/2074
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
Producing a mirror copy using incremental-divergence is performed in a computer system in which write requests are each associated with a reference label. A mirror set may be restored to a state in which the data storage devices contain identical data by copying from the data storage device having “good” data only portions of data which have not been stored on the data storage device having divergent data. Incremental-divergence copying may be accomplished by keeping track of the changes made after a point in which the data storage devices are known to contain identical data.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.