Chapter 1. Introduction
19
Figure 1-4 Load balancing cluster
– High Availability Cluster
•
Increases application or data availability
•
Two or more nodes (primary and backup)
•
Active/Passive and Active/Active configurations
•
“Fail-over” of resources to backup node (nodes) when primary node
fails
Figure 1-5 illustrates a high availability cluster.
Figure 1-5 High availability cluster
W ebSphere
Application Server
Instance 1
W ebSphere
Application Server
Instance 2
W ebSphere
Application Server
Instance 3
Load
Balancer
Server
Load
Balancer
Primary
Server
Server
Load
Balancer
Backup
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