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Scenario: What happens after the health
score of a primary BlackBerry Enterprise
Server falls below the failover threshold
The following scenario can occur if the messaging server, BlackBerry Infrastructure, and BlackBerry Configuration
Database are available.
1. The standby BlackBerry Enterprise Server determines that the health score of the primary BlackBerry Enterprise Server
fell below the failover threshold.
2. The standby BlackBerry Enterprise Server checks its own health score and determines that its health score is above the
promotion threshold and higher than the health score of the primary BlackBerry Enterprise Server.
3. The standby BlackBerry Enterprise Server sends a demotion request to the primary BlackBerry Enterprise Server.
4. The primary BlackBerry Enterprise Server self-demotes.
5. If your organization's environment includes the BlackBerry Enterprise Server for Novell GroupWise, the primary
BlackBerry Enterprise Server stops the Novell GroupWise SOAP connector.
6. The standby BlackBerry Enterprise Server opens active connections to the BlackBerry Configuration Database and
messaging server.
7. If your organization's environment includes the BlackBerry Enterprise Server for Novell GroupWise, the standby
BlackBerry Enterprise Server starts the GroupWise SOAP connector.
8. The standby BlackBerry Enterprise Server tries to open an SRP connection to the BlackBerry Infrastructure.
9. The standby BlackBerry Enterprise Server writes its identity as the primary BlackBerry Enterprise Server to the
BlackBerry Configuration Database.
BlackBerry Configuration Database high
availability
The type of BlackBerry Configuration Database high availability that you can configure depends on the type of database
server that is in your organization's environment.
If your organization's environment includes Microsoft SQL Server 2005 SP2 or later, you can configure database mirroring.
Database mirroring requires a principal database, a mirror database, and a witness. Although the BlackBerry Enterprise
Server can contact the mirror database, it opens active connections to the principal database only. If the principal
Feature and Technical Overview BlackBerry Enterprise Server high availability
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