Data replication in a distributed system
US7636868B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 27, 2006 |
| Grant date | Dec 22, 2009 |
| Priority date | — |
| Expiry date | Dec 22, 2027 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L67/1095
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A global state management service manages replication in a distributed system. A distributed system can have several replica groups. The global state management service manages state associated with each replica group. Data replication is implemented without implementing an instance of a state machine on each device in a replica group. A replica group comprises a primary device and at least one secondary device. Each device in a replica group contains a replica of data of interest. The global state management service manages the allocation of primary and secondary devices. In the absence of a failure in either a primary device or a secondary device, read and write operations are performed without consulting the global state management service. When a failure is detected, the global state management service manages failover.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.