System for taking backup in a data base
US5548750A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 8, 1993 |
| Grant date | Aug 20, 1996 |
| Priority date | — |
| Expiry date | Dec 8, 2013 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S707/99955
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
For backing up in a distributed real time data base on primary memory in operation, all data in the data base are structured as belonging to one of several logic data bases. The logic data can, but need not, extend over several processors. A backup function of a certain logic data base is activated by sending a message to a central backup handler, which has information regarding processors, over which the current backup system extends, and synchronizes the backup function over processor borders. The synchronization includes that local data base handlers are informed that backup will be started and that a new transaction log is being created, in which all transactions that have not attained a commit state and which shall therefore not be included in the backup are logged. The backup will only contain changes of transactions in the old transaction log.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.