Parallel database mirroring
US8775381B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | May 14, 2011 |
| Grant date | Jul 8, 2014 |
| Priority date | — |
| Expiry date | Jul 19, 2031 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F16/2358
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
In a database cluster comprising a plurality of mirrored database segments, a mirror database pair comprising a primary database and a mirror database are maintained substantially consistent by writing changes resulting from transactions to page data in parallel to the primary database and to the mirror database. Changes are sent to the mirror database over a network using network communications. Transaction logs are also written to the primary and mirrored databases in parallel, the transaction logs being sent to the mirror database using network communications. Bulk load changes resulting from transactions are written in parallel over the network to the primary database and the mirror database without writing the changes to a transaction log. In the event of a failure, resynchronization of the mirror database can be performed quickly while avoiding a lengthy ongoing redo process on the mirror database.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.