Asynchronous data redundancy technique
US7380081B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 6, 2003 |
| Grant date | May 27, 2008 |
| Priority date | — |
| Expiry date | Jan 16, 2025 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F2201/855
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A primary copy of data is held at a primary storage facility, while data that is redundant of the primary copy is held at a secondary storage facility. To inhibit propagation of errors from the primary copy to the redundant data, write transactions to the redundant data are queued at the second storage facility, until a specified time elapses or until a specified event occurs (or until combination hereof occurs). Write transactions may be collected in groups at the primary facility prior to forwarding to the secondary facility and may also be batched at the secondary facility prior to being applied to the redundant data. Overwrites may be allowed within a group at the primary facility to conserve communication bandwidth between the primary and secondary storage facilities. Overwrites may be allowed within a batch at the secondary facility to conserve space occupied by the transactions at the secondary facility.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.