Topologies

 

This chapter discusses some basic topologies and a variety of factors that come into play when considering the appropriate choice, such as:
Performance and throughput
Scalability, availability, maintainability
Security, session state

We describe some sample topologies that address these factors, presenting the fundamental advantages and disadvantages of each.

The following topics are discussed in this chapter:
J2EE tiers model
Topology selection criteria
Strategies for scalability
Single machine topology
Separating the Web server
Separating the database server
Vertical scaling
Horizontal scaling with clusters
One WebSphere administrative cell versus many
Multiple clusters on one node versus one cluster per node
The sample topology
Topologies and high availability
Closing thoughts on topologies
Topology selection summary

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IBM is a trademark of the IBM Corporation in the United States, other countries, or both.