Data recovery system and method of distributed transaction processing system
US5140689A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | May 23, 1991 |
| Grant date | Aug 18, 1992 |
| Priority date | — |
| Expiry date | May 23, 2011 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F2201/87
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
In a distributed transaction processing system of a two-phase commit scheme, a client sequentially requests all the servers to perform PHASE I processing. When all the servers complete the PHASE I processing, the client stores data indicating the completion of the processing. When an operation is restarted after a system down of a given server, the server inquires of the client whether all the servers have completed the PHASE I processing. If all the servers have completed the PHASE I processing, the server executes PHASE II processing. If not all the servers have completed the PHASE I processing, the server in which failures occur, causing abnormal system termination performs rollback processing, and the client requests other servers which have completed the PHASE I processing to perform rollback processing.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.