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
Restrictions on using mixed-release cells:
  • You can upgrade a portion of the nodes in a cell to WebSphere Application Server Version 6.1 while leaving others at the older release level. This means that, for a period of time, you might be administering servers that are at the current release and servers that are running the newer release in the same cell.

    Note that in this mixed-release environment, there might be some restrictions on what you can do with servers at the older release level. There might also be restrictions on creating clusters and cluster members.

  • A WebSphere Application Server Version 6.1 deployment cell can contain mixed releases of Version 5.x or 6.0.x nodes, but there is no mixed-node management support for Version 6.0.0.x and Version 6.0.1.x.
    The Version 6.1 migration tools still migrate these nodes during deployment-manager migration, but they issue a warning message that the nodes cannot be managed by the Version 6.1 deployment manager. You can then do one of the following based on your needs:
    • Upgrade all Version 6.0.0.x and Version 6.0.1.x nodes to at least Version 6.0.2. This will allow them to be administered by a Version 6.1 deployment manager.
    • Immediately migrate these nodes to Version 6.1.
  • You cannot add a Version 5.x node to an existing cell managed by a Version 6.x deployment manager.

    You can only include Version 5.x nodes in a Version 6.x mixed-release cell through migration. First, migrate the deployment manager from Version 5.x to Version 6.x; and then, either keep the nodes at Version 5.x or migrate them to Version 6.x.




Related information
Coexisting
Concept topic Concept topic    

Terms and conditions for information centers | Feedback

Last updatedLast updated: Aug 30, 2013 10:47:11 PM CDT
http://www14.software.ibm.com/webapp/wsbroker/redirect?version=pix&product=was-nd-iseries&topic=cmig_coexist
File name: cmig_coexist.html