High availability topologies

Use several different topologies to ensure high availability. The topology you choose depends on your specific needs and resources. These sample topologies incorporate various techniques to enhance availability:

• Vertical scaling sample topology
  This topology has cluster members of WebSphere Application Server resources on a single server node.

• Horizontal scaling sample topology
  This topology has cluster members of WebSphere Application Server resources distributed across two or more iSeries servers.

• Horizontal scaling with high availability Apache Web server sample topology
  This topology involves setting up multiple applications where multiple physical machines host each application.

• Horizontal scaling with Network Dispatcher sample topology
  This topology has cluster members of WebSphere Application Server resources distributed across two or more iSeries servers and uses IBM Network Dispatcher to distribute HTTP requests among those resources.

• Multiple WebSphere Application Server cells sample topology
  This topology involves multiple WebSphere Application Server cells where a different physical machine serves as a host for each cell.

• Sample combined topology
  This topology combines elements of the other topologies.