Roadmap: Migrating and coexisting application servers

Migrating involves collecting the configuration information from a previous release of a WebSphere® Application Server and merging it into a configuration for a new release. Coexisting involves running a new release of a WebSphere Application Server and an earlier release simultaneously on the same machine.

Before you begin

Supported configurations Supported configurations:

This article is about profile configuration migration. To migrate your applications to the latest version, use the WebSphere Application Server Migration Toolkit. For more information, see the Migration Toolkit on WASdev.

sptcfg

Read Overview of migration, coexistence, and interoperability and Migration considerations. For resources to help you plan and perform your migration, visit Knowledge Collection: Migration planning for WebSphere Application Server.

The migration tools basically save the existing WebSphere configurations and user applications in a backup directory and then process the contents of this backup directory to migrate the configurations and your applications from previous WebSphere Application Server releases to the latest release.

If you have a previous version of WebSphere Application Server, you must decide whether to migrate the configuration and applications of the previous version to the new version.

Migration does not uninstall the previous version.
  • For stand-alone application server migrations and for deployment-manager migrations in which you do not choose to disable the previous deployment manager during migration, the earlier release is still functional.
  • For federated-node migrations and for deployment-manager migrations in which you do choose to disable the previous deployment manager during migration, the earlier release is disabled after migration completes successfully. You can re-enable the earlier version using the migrationDisablementReversal.jacl script.

If you run two different versions of the application server at the same time, the two versions are coexisting. For example, if Version 7.0 and 8.5 application servers are running on the same machine, they are coexisting.

For help in troubleshooting problems when migrating, read Troubleshooting migration.

About this task

For information on migrating to Version 9.0, read Migrating product configurations. For more information on coexistence among releases, read Running coexisting application servers.

Procedure

  1. 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 9.0 product.

    After you install WebSphere Application Server Version 9.0, you might want to build a complete WebSphere Application Server, Network Deployment cell configuration and verify that it works correctly before you attempt to migrate an existing cell or node. This process ensures that your system has all of the necessary prerequisites and supports the new level of WebSphere Application Server.

  3. Migrate your WebSphere Application Server Version 7.0 or later product configuration to Version 9.0.
  4. Migrate web server plug-ins as described in Migrating web server configurations.
  5. Optional: Set up multiple versions of WebSphere Application Server to coexist.

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Timestamp icon Last updated: March 6, 2017 0:04
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