Method and apparatus for maintaining coherence among copies of a database shared by multiple computers
US6718347B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Jan 5, 1999 |
| Grant date | Apr 6, 2004 |
| Priority date | — |
| Expiry date | Jan 5, 2019 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S707/99953
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A method for use in a computer system including first and second computers and first and second storage systems, wherein the first storage system is coupled to the first computer to store data transferred from the first computer to the first storage system and the second storage system is coupled to the second computer to store data transferred from the second computer to the second storage system. The method is for updating data stored on at least one of the first and second storage systems, and includes updating a first logical volume of data stored on the first storage system with a first set of data transferred from the first computer to the first storage system; receiving, at the first storage system, a second set of data transmitted from the second storage system to the first storage system via at least one communication path that does not pass through the first computer; and updating the first logical volume of data with the second set of data transmitted from the second storage system.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.