Before you start
This topic describes general considerations for migrating a high availability domain. Refer to the product specific migration topics for detailed migration instructions.
High availability is the requirement for a system to be running all, or a very high proportion of, the time. Providing a high availability environment involves having multiple brokers so that some brokers can be used for backup purposes. The entire production domain might be duplicated so that the backup system can be switched on in the event of a problem.
Migration presents a problem in providing a high availability environment because there is a window of time between the stopping of the previous version of the product and the installation and starting of WebSphere Business Integration Event Broker Version 6.0. A solution is to install and configure WebSphere Business Integration Event Broker Version 6.0 while the previous version of the product is running in parallel, and then switch to using WebSphere Business Integration Event Broker Version 6.0. You can install WebSphere Business Integration Event Broker Version 6.0 on either the same systems that are running the previous version of the product, or on a different set of systems.
The following sections of this topic provide a general framework for how you might want to migrate your high availability domain. You might need to adjust these instructions to suit your specific circumstances. Refer to the product specific migration topics for detailed migration instructions.
The purpose of migrating the test domain before migrating the production domain is to identify any problems that might arise during migration. For example, if problems arise you might need to restore some migrated resources to the level that you backed up before you started the migration, and any post-migration changes to these resources would be lost. Testing the migration allows you to fix problems like this and develop a strategy for dealing with further problems.
To migrate the test domain, complete the following tasks. Refer to the product specific migration topics for detailed migration instructions.
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