Recovery in a distributed stateful publish-subscribe system
US7886180B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 14, 2004 |
| Grant date | Feb 8, 2011 |
| Priority date | — |
| Expiry date | Apr 1, 2028 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L67/142
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
Method, apparatus and computer program product for fault recovery in a distributed stateful publish-subscribe system. The system includes the capability of recovering from failures that may occur when a stateful publish-subscribe service is implemented on an overlay network. Such failures may include, for example, temporary crashes of broker machines, and network errors causing messages to possibly be lost, duplicated or delivered out of order. The system requires stable storage logging only when a published event enters the system, and requires that logged messages be retrieved from stable storage only in the event all brokers between a failed link or broker and the publishing sites have failed. The publish-subscribe system of the present invention does not require that broker-to-broker connections use reliable FIFO protocols, such as TCP/IP, but may advantageously use faster, less reliable protocols.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.