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.