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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 www.microsoft.com.
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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