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.
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.
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 Version 6.0.x installation, the two versions are coexisting. The migration articles describe migration from WebSphere Application Server for z/OS Version 5.x to WebSphere Application Server for z/OS Version 6.0.x.
You can also find more information on migrating to Version 6.0.x in the following document: Migrating from WebSphere for z/OS Version 5.x to Version 6 - An Example Migration.
You can coexist with or migrate from a previous version of WebSphere Application Server for z/OS.
For information on migrating to Version 6.0.x, see Migrating product configurations. For more information on coexistence among releases, see Coexistence support.
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