Database index journaling for enhanced recovery
US4819156A · kind A · utility
129Cited by
2References
14Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 13, 1986 |
| Grant date | Apr 4, 1989 |
| Priority date | — |
| Expiry date | Jun 13, 2006 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F11/1471
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A quick recovery of logical files which provide alternate views of databases is provided. Unchanged logical file pages are journaled before being changed. Transactions affecting databases covered by the logical files are also journaled. To recover a logical file, the journaled unchanged pages of the logical file that correspond to the changed pages are inserted back into the logical file, and the transactions that were journaled are processed to provide the changes to the logical file and to the database. This brings the logical file and the underlying database up to date, and in synchronization with each other.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.