Methods, apparatus and computer programs for data replication comprising a batch of descriptions of data changes
US7716181B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jun 15, 2005 |
| Grant date | May 11, 2010 |
| Priority date | — |
| Expiry date | Dec 21, 2027 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F11/2066
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
Methods, apparatus and computer programs are provided for data replication, such as for replicating a database or updating a cache. Source database change transactions are captured and batched together for efficient data transfer. On receipt at a target replica system, the batch of transactions within a message is separated and separate apply transactions corresponding to the source transactions are performed in parallel. A ‘transaction processed’ table is updated to reflect apply processing for each apply transaction. This table provides a confirmation of the status of each transaction that can be used during recovery processing to prevent re-apply of an apply transaction. The table can also be used to determine when it is safe to delete an incoming message from persistent storage on the target system, and to facilitate one-phase commit processing.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.