What is a Redundancy interface?
This section describes the Redundancy interface for server duplication.
The Redundancy interface is a proprietary TCP/IP-based communications protocol used for the redundancy functionality of FA-Server.
Both the main and sub FA-Server constantly check each other's survival status via a redundant communication line, and if the waiting sub receives no response from the main, it assumes that the other has stopped and automatically promotes itself to main and resumes processing.
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For details about the duplication function, see "Operation with server duplication". |
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The Redundancy interface provides System tag. For details on System tag, see "System tag" in Appendix. |