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Architecture: High availability for 
BlackBerry UEM

The following diagram shows a high availability domain with two 
BlackBerry UEM
 instances. You can install any number of 
BlackBerry UEM
 instances. This topic explains how specific components are involved in a high availability configuration. For more information about the 
BlackBerry UEM
 architecture and components, see the Architecture content.
 
 
Components
Description
BlackBerry UEM
 database
Each 
BlackBerry UEM
 instance connects to the 
BlackBerry UEM
 database to access user and device data.
Management console and 
BlackBerry UEM Core
You can use any management console to manage the domain’s user accounts and devices. The 
BlackBerry UEM Core
 associated with that console carries out the management tasks.
You can configure a round-robin DNS pool that connects to each console. If there is a problem with a console, the pool connects to a working console. 
Each instance manages enterprise connectivity for the 
BlackBerry 10
 devices that are assigned to it by the 
BlackBerry Affinity Manager
. Any healthy instance can process device management tasks for all device types.
BlackBerry MDS Connection Service
 and 
BlackBerry Dispatcher
These components allow 
BlackBerry 10
 devices to connect to and use work resources.
BlackBerry Affinity Manager
The 
BlackBerry Affinity Manager
 is responsible for:
  • Assigning 
    BlackBerry 10
     devices to 
    BlackBerry UEM
     instances
  • Maintaining a connection with the 
    BlackBerry Infrastructure
  • Checking the health of the 
    BlackBerry MDS Connection Service
     and 
    BlackBerry Dispatcher
     in each instance to monitor enterprise connectivity
Only one 
BlackBerry Affinity Manager
 is active (the others are on standby). If the active instance finds a problem with enterprise connectivity, it reassigns 
BlackBerry 10
 users to the healthy 
BlackBerry UEM
 instances.
Each standby 
BlackBerry Affinity Manager
 monitors the active 
BlackBerry Affinity Manager
. If there is a problem with the active 
BlackBerry Affinity Manager
, a failover occurs and one of the standby instances becomes active.