Migrating and coexisting

Migrating involves copying the configuration from a previous release of a WebSphere Application Server product into a new release. Coexisting involves 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.

Before you begin

For a compilation of links to documents and resources to help you plan and perform your migration, visit Knowledge Collection: Migration planning for WebSphere Application Server.

About 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 Overview of migration and coexistence for more information on coexistence.

You can also find more information on migrating to Version 6.0.x in the following document: WebSphere Application Server Version 6 Migration Guide.

Procedure

  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 Version 6.0.x product.
  3. Use the Migration wizard to migrate your configuration.

    The Migration wizard is new for Version 6.0; it provides a graphical user interface to the migration tools.

  4. Migrate Web server plug-ins as described in Migrating Web server configurations.
  5. Set up multiple versions of WebSphere Application Server to coexist.

    No runtime 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 Version 4.x and Version 6.0.x together as described in Setting up Version 4.0.x and Version 6.0.x coexistence.
    2. Run Version 5.x and Version 6.0.x together as described in Setting up Version 5.x and Version 6.0.x coexistence.
    3. Run two concurrent Version 6.0.x profiles as described in Setting up Version 6.0.x coexistence.
    4. Create more than one Version 6.0.x profile on the same machine.

Results

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

What to do next

Migration from Version 5.x to Version 6.0.x 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 Overview of migration and coexistence.




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Last updated: Aug 29, 2010 5:25:00 PM CDT
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