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Working with Portal Server Building Modules
96 Portal Server 6 2005Q1 • Deployment Planning Guide
Transparent Failover
Transparent failover uses the same replication model as the NSPOF scenario but
provides additional high availability features, which make the failover to a backup
server transparent to end users.
Figure 5-5 on page 96 shows a transparent failover scenario. Two building modules
are shown, consisting of four CPUs by eight GB RAM. Load balancing is
responsible for detecting Portal Server failures and redirecting users’ requests to a
backup Portal Server in the building module. Building Module 1 stores sessions in
the sessions repository. If a crash occurs, the application server retrieves sessions
created by Building Module 1 from the sessions repository.
Figure 5-5 Transparent Failover Example Scenario
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