IBM BS029ML - WebSphere Portal Server Self Help Manual page 39

community data between different Portal clusters, and the cluster members that participate in
each, ensures consistency at the user interaction level (new to Portal Server V6.0.x). That is,
any user customization made against one Portal cluster member, by a user, is now available
to the same user, as and when that user accesses any of the other cluster members
participating in the same or different Portal cluster. Each Portal cluster, in turn, maintains a
separate release repository, which provides a mechanism for maintaining all Portal resource
definitions, rules, and rights specific to that cluster.
Again, this is an acknowledged product improvement from the limitations associated with
WebSphere Portal Server V5.1.x and earlier. Failing to implement such an architecture would
otherwise necessitate deploying a single clustered instance of WebSphere Portal Server and
adopting either the IBM documented 24x7 Portal maintenance procedure or the use of a
secondary maintenance environment.
Figure 2-3 illustrates the system topology needed for a Portal Server V6.0.x dual cluster
architecture.
Firewall
HTTP Cluster A
Line of Production A
Firewall
Portal Cluster A
Line of Production A
WAS Cell A
Figure 2-3 Dual cluster architecture illustrating two lines of production
Key features of this architecture are:
Two independent HTTP Server clusters (HTTP Cluster A and HTTP Cluster B), consisting
of at least two physical nodes per cluster (so that each cluster is highly available in its own
right).
Two independent WebSphere Portal Server clusters (Portal Cluster A and Portal Cluster
B), one per WebSphere Cell.
Load Balancer
HTTP Server HTTP Server
node: ebizWS01 node: ebizWS02
WebSphere_Portal_3 WebSphere_Portal_7
WebSphere_Portal_2 WebSphere_Portal_6
WebSphere_Portal_1 WebSphere_Portal_5
WebSphere_Portal_4
WebSphere_Portal
node: PORTAL01 node: PORTAL02
node: PORTDB01
Load Balancer
HTTP Server HTTP Server
node: ebizWS01 node: ebizWS02
WebSphere_Portal_3 WebSphere_Portal_7
WebSphere_Portal_2 WebSphere_Portal_6
WebSphere_Portal_1 WebSphere_Portal_5
WebSphere_Portal_4
WebSphere_Portal
node: PORTAL03 node: PORTAL04
node: PORTDB02
Chapter 2. Architecture and planning
HTTP Cluster B
Line of Production B
Portal Cluster B
Line of Production B
WAS Cell B
WAS Cell A
Deployment Manager
Shared DMGR
WAS Cell B
Deployment Manager
node: WSND01
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