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Both BlackBerry Enterprise Server instances in the BlackBerry Enterprise Server pair include, by default, the BlackBerry
Attachment Service, BlackBerry Dispatcher, BlackBerry MDS Connection Service, BlackBerry Messaging Agent,
BlackBerry Policy Service, BlackBerry Router, and BlackBerry Synchronization Service. By default, if you choose to install
the BlackBerry Collaboration Service with both instances, the BlackBerry Collaboration Service is included in the
BlackBerry Enterprise Server pair.
To administer the BlackBerry Enterprise Server pair, you can install the BlackBerry Administration Service with both
BlackBerry Enterprise Server instances and configure high availability for the BlackBerry Administration Service
separately.
In a large-scale environment, you can add any number of BlackBerry Enterprise Server pairs that use the same BlackBerry
Configuration Database.
How the BlackBerry Enterprise Server
calculates health scores
Certain BlackBerry Enterprise Server components calculate a health score that indicates how well the component can
provide specific services. The components send their health scores to the BlackBerry Dispatcher, which combines the
health scores of the components to calculate the overall health score of the BlackBerry Enterprise Server. The BlackBerry
Dispatcher writes the information to the BlackBerry Configuration Database, and it provides the information to a
BlackBerry Enterprise Server that requests it.
Feature and Technical Overview BlackBerry Enterprise Server high availability
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