Using CitectSCADA > Building Redundancy Into Your System > Alarms, Reports and Trend Server Redundancy > Trends server redundancy

Trends server redundancy

It is possible to configure two Trends Servers in a project. That is, a primary Trends Server and a standby Trends Server.

When both Trends Servers are in operation, trends are processed on both servers in parallel, and written to disk (each server needs to write to its own disk or its own private area on the file server).

When a Trends Server starts up, it tries to establish a connection to the other Trends Server. If it can establish a connection, it will transfer the trend data from the last time it was shutdown until the current time (this minimizes the chance that trend data will be lost).

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