WebSphere Application Server Network Deployment, Version 6.0.x     Operating Systems: AIX, HP-UX, Linux, Solaris, Windows

Setting up a high availability environment

Why and when to perform this task

Planning ahead for high availability support is important to avoid the risk of a failure without failover coverage. The application server infrastructure that is managed by a high availability manager includes cells and clusters. These components relate closely to core groups, high availability groups, and the policy that controls the high availability infrastructure.

The high availability manager is designed to function in all of the supported WebSphere Application Server topologies. However, a high availability-managed environment must comply to the following rules:

The following diagram illustrates what a cell might look like in a high availability environment:

What to do next

Important: After you set up your WebSphere Application Server environment to comply with all of the high availability-managed environment rules, use the default core group to control this environment. DO NOT add additional core groups unless your environment absolutely requires them. Also, do not change the default configurations unless you are doing so to solve a specific problem or situation. When you do make configuration changes, such as changing the policy for a high availability group or moving core group members between core groups in a multi-core group environment, make sure you fully understand the effect such changes will have on your entire environment.



Sub-topics
High availability manager
High availability network components
Transport protocol for a high availability manager
Creating a new core group
Changing a core group's configuration
Setting up IP addresses for high availability manger communications
Changing the configuration of a high availability group
Creating a policy for a high availability group
Changing the policy of a high availability group
Adding members to a core group
Routing high availability group work to a different server
Configuring the core group bridge between core groups that are in different cells
Troubleshooting high availability environment problems
Task topic    

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Last updated: Mar 17, 2005 4:28:29 AM CST
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