I/O device having check recovery function
US5878202A · kind A · utility
5Cited by
4References
6Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Sep 30, 1996 |
| Grant date | Mar 2, 1999 |
| Priority date | — |
| Expiry date | Sep 30, 2016 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F11/1435
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
When a data write request is received from an application program, the received data write request is issued to a disk (primary) without waiting next check point, and the data write request is issued to a disk (shadow) after obtaining next check point. When restarting a process from obtained preceding check point, data in the disk (primary) is recovered by data in the disk (shadow). As a result, a delay of I/O request by a check point is decreased, thereby remarkably improving system performance in a normal operation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.