Database mirroring for both BlackBerry Enterprise Service 10 databases

If you want to set up database mirroring, you must configure database mirroring for both the BlackBerry Configuration Database (associated with the BlackBerry Device Service) and for the Management Database (associated with the Universal Device Service). Configuring mirroring for both databases keeps data management consistent in the event of a failover, and prevents unnecessary errors. When you install BlackBerry Enterprise Service 10, you install the BlackBerry Configuration Database and the Management Database on the same computer, in the same instance of Microsoft SQL Server. These are your principal databases, located on the principal server.

You must create the mirror databases on the same computer (the mirror server), in the same instance of Microsoft SQL Server. You then configure the BlackBerry Enterprise Service 10 components to connect to the mirror server so that they can fail over to the mirror databases if necessary.

You configure one witness server to monitor the principal server and initiate automatic failover if one of the principal databases stops responding.