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When disaster strikes and the primary database is no longer available the standby database must be activated to become the new primary database to continue operation. 
This is also called failover to the standby database.
The steps to activate the standby database are:

  1. Stop the scheduling of Dbvisit Standby.
  2. Change the network configuration (or DNS) so that users will connect to the standby database (or server) instead of the primary database (or server).
  3. Activate and open the standby database for normal operation as per instructions below. As soon as the standby database is activated and becomes the new active primary database, the link to the original primary database is lost and it is no longer possible to apply new logs to the original primary standby database.

To activate and open the standby database for continued operation in the event of a disaster the following procedure must be used:

...

1. Manually run Dbvisit Standby to ensure all log files have been applied.

Home > Run > Run Interactive > Standby Server tab > select Database from drop-down menu > select Default from Run Action drop-down menu > Run

2. Activate the standby database. A prompt will be displayed to ask for confirmation:

...