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3: Migration overview

3: Migration overview

Migration focuses on leveraging the existing environment and applications, changing them to be compatible with the current product version, instead of starting from the beginning.

Migration for IBM WebSphere Application Server Version 4.0 includes the following activities:

Activity Where to find instructions
1. Migrate or upgrade product prerequisites to supported versions

As the product version changes, its prerequisites or corequisites also change. It is probably necessary to update your database, Web server, JDK version, and other software.


Article 3.1
2. Upgrade to IBM WebSphere Application Server Version 4.0

In most cases, migration programs are available to ease the transition. However, some manual preparation may be necessary.

Programmatic support for migration from Version 2.0x is not provided. To migrate your installation from Version 2.0x, follow the documentation, starting at article 3.2.1.


Article 3.2. See also Installing the product
3. Migrate administrative configurations

If your company has been using a previous product version, the system administrator has probably fine-tuned various application and server settings for the environment. It is important to have a strategy for migrating these settings with maximum efficiency and minimal loss.


Start with Article 3.2.2.
4. Update application code to supported specification and API levels

Note: Support for several APIs has been removed in Version 4.0.

Section 4 of the InfoCenter focuses on developing new applications, though it also outlines new APIs whose functions you might add to existing applications in a piecemeal fashion.


Article 3.3
5. Redeploy applications on Version 4.0 Article 6.3.2

Before you begin, be sure to read Transitioning to Version 4.0. That article outlines the reorganization of the Version 4.0 product relative to Version 3.x.

Go to previous article: Installing WebSphere Application Server Go to next article: Transitioning to Version 4.0

 

 
Go to previous article: Installing WebSphere Application Server Go to next article: Transitioning to Version 4.0