Method and system for dynamically and asynchronously expanding a file in a on-line database system without suppression of job execution
US5604900A · kind A · utility
Assignees
Inventors
Key dates
| Filing date | Jun 6, 1995 |
| Grant date | Feb 18, 1997 |
| Priority date | — |
| Expiry date | Jun 6, 2015 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S707/99956
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A dynamic file expansion method and system for on-line database systems is provided. When an empty space of a file becomes insufficient, the file is dynamically expanded asynchronously with a record input/output process relative to an already existing space, by using another process while continuing the record input/output process. Jobs are not therefore intercepted and adversely affected by insufficient empty space of the file. In the structure of the method and system, a file expansion timing detecting section monitors the remaining empty space of a file with the help of a record input/output processing section. When the remaining empty space becomes equal to or less than a predetermined space registered in a file expansion information registering section, a dynamic file expansion is requested to an asynchronous file expanding section. The asynchronous file expanding section generates new space management information using a process different from the process executed by the record input/output processing section, to execute a space expanding process and an expanded space initializing process.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.