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

Migrating and coexisting

This topic describes migrating, which is copying the configuration from a previous release of a WebSphere Application Server product into a new release. This topic also describes coexisting, which is running a new release of a WebSphere Application Server product on the same machine at the same time as you run an earlier release, or running two installations of the same release of a WebSphere Application Server product on the same machine at the same time.

Why and when to perform this task

If you have a previous version, you must decide whether to copy the configuration and applications of the previous version to the new version. Migration does not uninstall the previous version. To run an earlier release and the new release at the same time is coexistence. To support coexistence, you need to provide non-default port assignments during profile creation. See Migration and coexistence overview for more information on coexistence.

You can also find more information on migrating to V6 in the following Redbook: WebSphere Application Server V6 Migration Guide.

Use the following procedure to migrate applications and configurations:

Steps for this task

  1. Prepare to migrate or update product prerequisites and corequisites to supported versions.

    Refer to the IBM WebSphere Application Server supported hardware, software, and APIs site for current requirements.

  2. Install the V6 product.
  3. Use the Migration wizard to migrate your configuration.

    The Migration wizard is new for Version 6; it provides a graphical user interface to the migration tools.

  4. Set up multiple versions of WebSphere Application Server to coexist. No run-time conflicts can exist for multiple instances and versions of WebSphere Application Server to run at the same time on the same machine. Potential conflicts can occur with your port assignments. See Port number settings in WebSphere Application Server versions for more information.
    1. Run V4 and V6 together, as described in Setting up Version 4.0.x and Version 6 coexistence.
    2. Run V5 and V6 together, as described in Setting up Version 5 and Version 6 coexistence.
    3. Run two concurrent V6 profiles, as described in Setting up Version 6 coexistence.
    4. Create more than one V6 profile on the same machine, as described in Using the Profile creation wizard.

Result

You can coexist with, or migrate the applications and configuration from a previous version of WebSphere Application Server.

What to do next

Migration from V5 to V6 does not require extensive tuning. See Migrating product configurations for a description of fine tuning a migration. Part of the procedure for using the migration tools includes a description of what to tune after using the tools.

For more information on coexistence among releases, see Migration and coexistence overview.




Sub-topics
Migration and coexistence overview
Configuration mapping during migration
Migrating APIs and specifications
Migrating WebSphere programming model extensions (PMEs)
Migrating a previously non-root configuration to root

Related tasks
Migrating Web server configurations
Using the Profile creation wizard
Task overview: Installing

Related reference
Port number settings in WebSphere Application Server versions

Task topic    

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Last updated: Jun 8, 2005 12:45:23 PM EDT
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