Blackberry ENTERPRISE SOLUTION SECURITY - SECURITY FOR DEVICES WITH BLUETOOTH WIRELESS TECHNOLOGY - TECHNICAL Bedienungsanleitung PDF herunterladen (Seite 64)

Scenario: What happens after the health score of a primary BlackBerry

Enterprise Server falls below the failover threshold

The following scenario assumes that the messaging server, BlackBerry® Infrastructure, and BlackBerry Configuration Database

are available.

1. The standby BlackBerry® Enterprise Server determines that the health score of the primary BlackBerry Enterprise Server

fell below the failover threshold.

2. The standby BlackBerry Enterprise Server checks its health score and determines that its health score is above the promotion

threshold and higher than the health score of the primary BlackBerry Enterprise Server.

3. The standby BlackBerry Enterprise Server sends a demotion request to the pimary BlackBerry Enterprise Server.

4. The primary BlackBerry Enterprise Server demotes itself.

5. The standby BlackBerry Enterprise Server opens active connections to the BlackBerry Configuration Database and

messaging server.

6. The standby BlackBerry Enterprise Server tries to open an SRP connection to the BlackBerry Infrastructure.

7. The standby BlackBerry Enterprise Server writes its identity as the primary BlackBerry Enterprise Server to the BlackBerry

Configuration Database.

BlackBerry Configuration Database high availability

The type of BlackBerry® Configuration Database high availability that you can configure depends on the type of database server

that is in your organization's environment.

If your organization's environment includes Microsoft® SQL Server® 2005 SP2 or later, you can configure database mirroring.

Database mirroring requires a principal database, mirror database, and, optionally, a witness. Although the BlackBerry® Enterprise

Server can contact the mirror database, it opens active connections to the principal database only. If the principal 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.

Feature and Technical Overview

Scenario: What happens after the health score of a primary BlackBerry Enterprise Server falls below the failover threshold

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Blackberry ENTERPRISE SOLUTION SECURITY - SECURITY FOR DEVICES WITH BLUETOOTH WIRELESS TECHNOLOGY - TECHNICAL Bedienungsanleitung Seite 64