BlackBerry Home Theater Server for microsoft exchange User Manual

database stops responding, the BlackBerry Enterprise Server opens an active connection to the mirror database 

automatically. Database mirroring provides fault tolerance for the BlackBerry Enterprise Solution.
If your organization's environment includes a version of Microsoft SQL Server that is earlier than version 2005 SP2, you can 

configure transactional replication of the BlackBerry Configuration Database and create a replicated BlackBerry 

Configuration Database. If the BlackBerry Configuration Database stops responding, you must fail over the BlackBerry 

Enterprise Server to the replicated BlackBerry Configuration Database manually.
For more information about database mirroring, visit 

BlackBerry Configuration Database mirroring

The following diagram shows how you can configure the BlackBerry Configuration Database with principal and mirror 

instances and a witness for high availability. The BlackBerry Enterprise Server connects to the principal BlackBerry 

Configuration Database directly, and can fail over to the mirror BlackBerry Configuration Database if the principal 

BlackBerry Configuration Database stops responding.
 

 
The primary BlackBerry Enterprise Server connects to the principal BlackBerry Configuration Database and accesses data 

from it. The name of the mirror BlackBerry Configuration Database is stored in the Windows registry of the computers that 

hosts the primary and standby BlackBerry Enterprise Server instances. The BlackBerry Enterprise Server instances do not 

connect to the mirror BlackBerry Configuration Database until after the principal BlackBerry Configuration Database stops 

responding.

Feature and Technical Overview

BlackBerry Enterprise Server high availability

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