Coexistence support

Coexistence is a state in which multiple installations and multiple nodes from different versions of WebSphere Application Server run independently in the same environment at the same time.

As it applies to WebSphere Application Server products, coexistence primarily refers to the ability of multiple installations of WebSphere Application Server to run independently on the same machine at the same time. Multiple installations include multiple versions and multiple instances of one version. Coexistence also implies various combinations of Web server interaction.

WebSphere Application Server Version 6.1 products can coexist with the following supported versions:
  • IBM WebSphere Application Server Version 5.0.x
  • IBM WebSphere Application Server Network Deployment Version 5.0.x
  • IBM WebSphere Application Server Version 5.1.x
  • IBM WebSphere Application Server Network Deployment Version 5.1.x
  • IBM WebSphere Application Server Version 6.0.x
  • IBM WebSphere Application Server Network Deployment Version 6.0.x

All combinations of Version 5.x products, Version 6.0.x products, and Version 6.1 products can coexist so long as there are no port conflicts.

WebSphere Application Server Version 5.x and Version 6.0.x clients can coexist with Version 6.1 clients.

Table 1. WebSphere Application Server clients Version 5.x, Version 6.0, and Version 6.1 multiversion coexistence scenarios
Installed product WebSphere Application Server Version 6.1 clients
WebSphere Application Server Version 5.0 Supported
WebSphere Application Server Network Deployment Version 5.0 Supported
WebSphere Application Server Version 5.0.1 Supported
WebSphere Application Server Network Deployment Version 5.0.1 Supported
WebSphere Application Server Version 5.0.2 Supported
WebSphere Application Server Network Deployment Version 5.0.2 Supported
WebSphere Application Server Version 5.1 Supported
WebSphere Application Server Network Deployment Version 5.1 Supported
WebSphere Application Server Version 6.0 Supported
WebSphere Application Server Network Deployment Version 6.0 Supported
WebSphere Application Server Version 6.0.1 Supported
WebSphere Application Server Network Deployment Version 6.0.1 Supported
WebSphere Application Server Version 6.0.2 Supported
WebSphere Application Server Network Deployment Version 6.0.2 Supported

WebSphere Application Server Version 5.x and Version 6.0.x products can coexist with Version 6.1 products.

Table 2. WebSphere Application Server Version 5.x, Version 6.0, and Version 6.1 multiversion coexistence scenarios
Installed product WebSphere Application Server Version 5.x WebSphere Application Server Version 6.0 WebSphere Application Server Version 6.1
Application Server Network Deployment Application Server Network Deployment Express Application Server Network Deployment Express
WebSphere Application Server Version 5.0 Supported Supported Supported Supported Supported Supported Supported Supported
WebSphere Application Server Network Deployment Version 5.0 Supported Supported Supported Supported Supported Supported Supported Supported
WebSphere Application Server clients Version 5.0 Supported Supported Supported Supported Supported Supported Supported Supported
WebSphere Application Server Version 5.0.1 Supported Supported Supported Supported Supported Supported Supported Supported
WebSphere Application Server Network Deployment Version 5.0.1 Supported Supported Supported Supported Supported Supported Supported Supported
WebSphere Application Server clients Version 5.0.1 Supported Supported Supported Supported Supported Supported Supported Supported
WebSphere Application Server Version 5.0.2 Supported Supported Supported Supported Supported Supported Supported Supported
WebSphere Application Server Network Deployment Version 5.0.2 Supported Supported Supported Supported Supported Supported Supported Supported
WebSphere Application Server clients Version 5.0.2 Supported Supported Supported Supported Supported Supported Supported Supported
WebSphere Application Server Version 5.1 Supported Supported Supported Supported Supported Supported Supported Supported
WebSphere Application Server Network Deployment Version 5.1 Supported Supported Supported Supported Supported Supported Supported Supported
WebSphere Application Server clients Version 5.1 Supported Supported Supported Supported Supported Supported Supported Supported
WebSphere Application Server Version 6.0 Supported Supported Supported Supported Supported Supported Supported Supported
WebSphere Application Server Network Deployment Version 6.0 Supported Supported Supported Supported Supported Supported Supported Supported
WebSphere Application Server clients Version 6.0 Supported Supported Supported Supported Supported Supported Supported Supported
WebSphere Application Server Version 6.0.1 Supported Supported Supported Supported Supported Supported Supported Supported
WebSphere Application Server Network Deployment Version 6.0.1 Supported Supported Supported Supported Supported Supported Supported Supported
WebSphere Application Server clients Version 6.0.1 Supported Supported Supported Supported Supported Supported Supported Supported
WebSphere Application Server Version 6.0.2 Supported Supported Supported Supported Supported Supported Supported Supported
WebSphere Application Server Network Deployment Version 6.0.2 Supported Supported Supported Supported Supported Supported Supported Supported
WebSphere Application Server clients Version 6.0.2 Supported Supported Supported Supported Supported Supported Supported Supported
WebSphere Application Server Version 6.1 Supported Supported Supported Supported Supported Supported Supported Supported
WebSphere Application Server Network Deployment Version 6.1 Supported Supported Supported Supported Supported Supported Supported Supported
WebSphere Application Server clients Version 6.1 Supported Supported Supported Supported Supported Supported Supported Supported
In addition to multiversion coexistence, WebSphere Application Server also lets you install multiple times on one machine (multiple installation instances) or install once and have multiple profiles. Multiple Version 6.1 installation instances on one machine include the following combinations:
  • Multiple application server profiles from multiple installations of the WebSphere Application Server product
  • Multiple application server profiles from a single installation of the WebSphere Application Server product



Related information
Coexisting
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