Failover – OPC Unified Architecture – Part 4: Services

OPC Unified Architecture – Part 4: Services

v1.05.07

1Scope
2Normative references
3Terms, definitions, abbreviated terms and conventions
4Overview
- 4.1Service Set model
- 4.2Request/response Service procedures
5Service Sets
6Service behaviours
7Common parameter type definitions
Annex ABNF definitions (Informative)
Annex BContentFilter and Query examples (Informative)

3.1.7 Failover

act of switching the source or target of information.

Note 1

Note 1 to entry: In OPC UA redundant systems, a Failover is the act of a Client switching away from a failed or degraded Server to another Server in the redundant set (Server failover). In some cases a Client may have no knowledge of a Failover action occurring (transparent redundancy). A Client failover is the act of an alternate Client replacing an existing failed or degraded Client connection to a Server.