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