Consistent reintegration of a failed primary instance
US7499954B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 1, 2004 |
| Grant date | Mar 3, 2009 |
| Priority date | — |
| Expiry date | Oct 8, 2025 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F11/1662
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A method and system are provided for providing a consistent reintegration of a failed primary instance as a new secondary instance with implementation of truncation of log records. Upon failure of a primary instance, a secondary instance may be reassigned as the new primary instance. Prior to reintegration, any portion of the database log of the failed primary that is after the log position of the new primary instance may be truncated, followed by a comparison of the log positions of both the new primary instance and the new secondary instance. In limited circumstances, the truncation of the log data generated by the failed primary instance after the point of failure is possible, and supports reintegration of the failed primary as a new secondary instance with limited overhead.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.