Best practice: Planning for BlackBerry MDS Connection Service high availability

To plan for BlackBerry® MDS Connection Service high availability, you can install BlackBerry MDS Connection Service instances with the BlackBerry® Enterprise Server and on separate computers.

If you install one or two BlackBerry Enterprise Server pairs, you must configure at least two BlackBerry MDS Connection Service instances in a pool. If you install more than three BlackBerry Enterprise Server pairs, you must either configure two BlackBerry MDS Connection Service instances in a pool or configure a pool that includes the same number of BlackBerry MDS Connection Service instances as there are BlackBerry Enterprise Server pairs. In all scenarios, if your organization's environment includes push applications, you must configure at least two of the instances as central push servers.

When you plan for BlackBerry MDS Connection Service high availability, you should consider the performance requirements and system requirements of the BlackBerry Enterprise Server and BlackBerry MDS Connection Service and choose one of the following scenarios:

Scenario

Best practice

Install the BlackBerry MDS Connection Service instances with the BlackBerry Enterprise Server pair and configure a BlackBerry MDS Connection Service pool that can automatically fail over.

If you install BlackBerry MDS Connection Service instances with the primary and standby BlackBerry Enterprise Server, you can create a BlackBerry MDS Connection Service pool that includes both instances. You can configure the primary BlackBerry Enterprise Server to assign an active connection to the BlackBerry MDS Connection Service that you installed on the same computer, and to assign a standby connection to the BlackBerry MDS Connection Service that you installed with the standby BlackBerry Enterprise Server. You can configure automatic failover for the BlackBerry MDS Connection Service instances.

If the BlackBerry MDS Connection Service that you installed with the primary BlackBerry Enterprise Server stops responding, the primary BlackBerry Enterprise Server can fail over to the BlackBerry MDS Connection Service instance that you installed with the standby BlackBerry Enterprise Server.

By default, the BlackBerry Enterprise Server includes the BlackBerry MDS Connection Service.

Install the BlackBerry MDS Connection Service instances with the BlackBerry Enterprise Server pair and configure a BlackBerry MDS Connection Service pool that does not fail over automatically.

If you install BlackBerry MDS Connection Service instances with the primary and standby BlackBerry Enterprise Server, you can create a BlackBerry MDS Connection Service pool that includes both instances. You can configure the primary BlackBerry Enterprise Server to assign an active connection to the BlackBerry MDS Connection Service that you installed on the same computer, and to assign a standby connection to the BlackBerry MDS Connection Service that you installed with the standby BlackBerry Enterprise Server. You can choose not to configure automatic failover for the BlackBerry MDS Connection Service instances but you can configure the threshold parameter for the BlackBerry MDS Connection Service to be above the failover threshold.

If the BlackBerry MDS Connection Service that you installed with the primary BlackBerry Enterprise Server stops responding, the primary BlackBerry Enterprise Server and the BlackBerry MDS Connection Service fail over to the standby BlackBerry Enterprise Server and BlackBerry MDS Connection Service.

Install multiple BlackBerry MDS Connection Service instances with the BlackBerry Enterprise Server or on different computers and configure a BlackBerry MDS Connection Service pool that can automatically failover.

If you install multiple BlackBerry MDS Connection Service instances, you can configure a BlackBerry MDS Connection Service pool. Each BlackBerry MDS Connection Service instance can support multiple primary BlackBerry Enterprise Server instances. You can configure automatic failover for the BlackBerry MDS Connection Service instances and select which BlackBerry MDS Connection Service has the active connection to each primary BlackBerry Enterprise Server.

If the BlackBerry MDS Connection Service with the active connection stops responding, the BlackBerry Enterprise Server can fail over to a different BlackBerry MDS Connection Service instance.


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