[Version 5.0.2 and later]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.

Before you begin

IBM Support offers tutorials on various WebSphere Application Server installation topics. See WebSphere education on demand: Installation best practices tutorials for more information. One topic describes migration. Another topic describes installing a coexisting WebSphere Application Server product.

Determine if an existing version of WebSphere Application Server is installed on the machine where you plan to install your Version 5.x product.

Why and when to perform this task

If you have a previous version, you must plan whether to migrate the configuration and applications of the previous version to the new version. Migration does not uninstall the previous version. The earlier release is still functional. If you run the earlier release at the same time as the WebSphere Application Server for z/OS V5 installation, the two versions are coexisting. The migration articles describe migration from WebSphere Application Server for z/OS V3.5SE, WebSphere Application Server for z/OS V4.0.1, and WebSphere Application Server for z/OS 5.0 levels and coexisting with these prior levels. Unless otherwise noted, information pertaining to V3.5SE migration is valid for customers moving from the V4.0.1 Alternate Configuration Option. See Migration and coexistence overview for more information.

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

WebSphere Application Server for z/OS V5.1 does not provide support for migrating a WebSphere Application Server for z/OS V5.0.x configuration that contains integral JMS provider (IJP) definitions. JMS applications must be manually installed and reconfigured post-migration to use the WebSphere Application Server for z/OS V5.1 JMS provider.

Migration from V5.0 to V5.1 should be minimal; new migration utilities have been provided to facilitate migration of configurations as well as applications. Migration from V4.0.1 to V5 does not require extensive tuning. Migration from V3.5SE to V5 does require that you examine the migrating applications. After planning for migration and coexistence, continue the installation.

Steps for this task

Select the appropriate migration task:

What to do next

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


Related concepts
Migration and coexistence overview
Migrating
Related tasks
Installing WebSphere Application Server products
Related reference
Coexistence support
Port number settings in WebSphere Application Server versions
Installation: Resources for learning
Specification level summary of WebSphere Application Server
Prerequisites needed for WebSphere Application Server for z/OS
Coexistence port definitions
XML parser for Java code



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Last updated: Jun 21, 2007 9:56:50 PM CDT    WebSphere Application Server for z/OS, Version 5.0.2
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