Method and apparatus for reduction of I/O operations in persistent storage system
US5748885A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jul 15, 1996 |
| Grant date | May 5, 1998 |
| Priority date | — |
| Expiry date | Jul 15, 2016 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F11/1076
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A method and apparatus for reducing the number of I/O operations in a persistent storage system. A block of data to be written to a location on a persistent storage device is exclusive OR'd (XOR'd) with the block of data currently stored at the location on the device. The result of the XOR operation is examined for differences between the block of data currently stored in the location and the block of data to be written to the location. If the result of the XOR operation indicates that there is no difference between the block of data currently in the location and the block of data to be written to the location, additional I/O operations are avoided.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.