Failover

Failover is the newest addition to the AVEVA Adapter framework’s capabilities; adapter and data source failover are supported.

With client failover, you can configure two adapters as part of a redundant group, so that the secondary adapter may take the place of the primary adapter in the event of a connection loss to the failover endpoint or data source.

Failover logic

There are two client failover modes that the Structured Data File adapter can be configured to use:

• Cold

  In cold failover mode, you configure the secondary adapter but none of the configured components for the secondary adapter instance start. After a failover event occurs, the secondary adapter becomes the primary and begins to collect and egress data.

• Warm

  In warm failover mode, configured components for the secondary adapter instance start and connect to the data source but do not collect or egress data from the data source. After a failover event occurs, the secondary becomes the primary and begin to collect and egress data.

For more information about failover modes, failover scoring and configuring client-level failover, see Client failover.