System and method for synchronizing copies of data in a computer system
US7581025B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 31, 2006 |
| Grant date | Aug 25, 2009 |
| Priority date | — |
| Expiry date | Jun 16, 2027 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F16/275
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
An improved synchronization system and method for copies of data in a computer system. The computer system comprises a cluster, wherein each computer in the cluster may store a local copy of a data set along with a validity flag for the local copy. The computer system further comprises a coupling system which is connected to each of the computers in the cluster through a coupling system interface program, wherein the coupling system is configured to coordinate the data sharing and workload of the cluster. The computer system also comprises an external data storage shared by the computers in the cluster. One of the computers may read a first copy of the data set from a primary data set on the external data storage. The computer may then store the first copy locally and set a first validity flag to indicate that the first copy is valid. Another computer, server, or application program may make a second copy of the primary data set and set a second validity flag to valid. If the first copy is modified, then the second validity flag is set to invalid. The second copy may then be replaced with the modified copy, and the second validity flag may be set to valid again. A coupling system i…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.