The Recover Active Server process lets you forcibly make the Master or Replica server the active server without completing the data synchronization process. This action is necessary in cases where you do not want to synchronize data. For example, if switchover occurred but no data was changed on the Replica server. In this case, you can even have newer data on the Master server making it undesirable to synchronize data from the Replica to the Master server.
To use this option, make sure that the scenario is stopped, and select Recover Active Server from the Tools menu. Select either Make Master Active or Make Replica Active depending on which server you want to make active. If you make the Master active, the process stops and unregisters the virtual machine (that the appliance created). If you make the Replica active, the appliance registers and starts the virtual machine.
Note: When the platform is Amazon EC2, the appliance would stop the VM without unregistering. Register or unregister the VM separately.
Important! While this option is the right choice in many situations, use it with caution. When used improperly data loss can occur. Usually, RHA does not allow switching from one host to another until all data is synchronized. When using Recover Active Server, RHA is forcing users to one server or the other with no regard as to which server has the correct data set. Thus, as an administrator, manually make sure that the server you are making active has the most up-to-date data set.
If the Recover Active Server method does not solve the problem, you can manually recover a server. For more information, refer to the section, Recovering Servers.
The following scenarios are some examples where you can use the recover active server process.
After switchover or failover, the Master server becomes the standby server, and the Replica (virtual machine the appliance created) the active server. Now if you do not want to make the Replica as the active server, then you can use this feature and can make the master active.
The Recover Active Server dialog opens.
You can run the forward scenario again.
You created a scenario and just synchronized the Master and Replica. In this case, the master is active and the replica is inactive. In some cases, you want to make the replica active, for example, if you want to check whether the replica (virtual machine) is available and working as expected.
The Recover Active Server dialog opens.
The appliance registers and starts the virtual machine.
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