After a system failure or during server maintenance, you might have to perform the following HotStandby (HSB) tasks:
1 Switch the server state. This includes setting the primary server to PRIMARY ALONE state, which continues accumulating transactions in the transaction log so that they can be sent to the secondary server later, or shutting down HSB.
2 Synchronize the servers to be sure the primary and secondary databases are identical.
3 Connect the primary server to the secondary server if the communication link is broken for some reason.
If you are using the High Availability Controller (HAC) and High Availability Manager (HAM) complete the following steps instead:
1 Press the Switch button in the HAM. If the server needs to be shut down, press the Shutdown button in the HAM.
2 Set the HAC instances to the ADMINISTRATIVE mode by pressing the Administrative buttons in the HAM.
3 Set the HAC instances to AUTOMATIC mode by pressing the Automatic buttons in the HAM.
Important If the HAC is used, but you want to perform administrative steps manually rather than use the HAM, set HAC instances to ADMINISTRATIVE mode before you start the administration task.