Coexistence support

Coexistence support

Coexistence is a state in which multiple installations and multiple nodes from different versions of WAS 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 WAS 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. WAS Version 6.1 products can coexist with the following supported versions:

IBM WAS V5.0.x

IBM WAS ND V5.0.x

IBM WAS Enterprise V5.0.x

IBM WAS V5.1.x

IBM WAS ND V5.1.x

IBM WAS V6.0.x

IBM WAS ND V6.0.x

All combinations of V5.x products, V6.0.x products, and V6.1 products can coexist so long as there are no port conflicts.
WebSphere Application Server V5.x and V6.0.x clients can coexist with V6.1 clients.
Table 1. WebSphere Application Server V5.x, V6.0.x, and V6.1 clients multiversion coexistence scenarios

Installed product WebSphere Application Server V6.1 clients
WAS Version 5.0 Supported
WAS Network Deployment V5.0 Supported
WebSphere Business Integration Server Foundation V5.0 Supported
WAS Version 5.0.1 Supported
WAS Network Deployment V5.0.1 Supported
WebSphere Business Integration Server Foundation V5.0.1 Supported
WAS Version 5.0.2 Supported
WAS Network Deployment V5.0.2 Supported
WebSphere Business Integration Server Foundation V5.0.2 Supported
WAS Version 5.1 Supported
WAS Network Deployment V5.1 Supported
WAS Version 6.0 Supported
WAS Network Deployment V6.0 Supported
WAS Version 6.0.1 Supported
WAS Network Deployment V6.0.1 Supported
WAS Version 6.0.2 Supported
WAS Network Deployment V6.0.2 Supported

WAS Version 5.x and V6.0.x products can coexist with V6.1 products.
Table 2. WebSphere Application Server V5.x, V6.0, and V6.1 multiversion coexistence scenarios

Installed product WebSphere Application Server V5.x WebSphere Application Server V6.0.x WebSphere Application Server V6.1
Application Server Network Deployment Enterprise / WBISF Application Server Network Deployment Express Application Server Network Deployment Express
WAS Version 5.0 Supported Supported Supported Supported Supported Supported Supported Supported Supported
WAS Network Deployment V5.0 Supported Supported Supported Supported Supported Supported Supported Supported Supported
WAS Enterprise V5.0 Supported Supported Supported Supported Supported Supported Supported Supported Supported
WAS clients V5.0 Supported Supported Supported Supported Supported Supported Supported Supported Supported
WAS Version 5.0.1 Supported Supported Supported Supported Supported Supported Supported Supported Supported
WAS Network Deployment V5.0.1 Supported Supported Supported Supported Supported Supported Supported Supported Supported
WAS Enterprise V5.0.1 Supported Supported Supported Supported Supported Supported Supported Supported Supported
WAS clients V5.0.1 Supported Supported Supported Supported Supported Supported Supported Supported Supported
WAS Version 5.0.2 Supported Supported Supported Supported Supported Supported Supported Supported Supported
WAS Network Deployment V5.0.2 Supported Supported Supported Supported Supported Supported Supported Supported Supported
WAS Enterprise V5.0.2 Supported Supported Supported Supported Supported Supported Supported Supported Supported
WAS clients V5.0.2 Supported Supported Supported Supported Supported Supported Supported Supported Supported
WAS Version 5.1 Supported Supported Supported Supported Supported Supported Supported Supported Supported
WAS Network Deployment V5.1 Supported Supported Supported Supported Supported Supported Supported Supported Supported
WAS Integration Server V5.1 Supported Supported Supported Supported Supported Supported Supported Supported Supported
WAS clients V5.1 Supported Supported Supported Supported Supported Supported Supported Supported Supported
WAS Version 6.0.1 Supported Supported Supported Supported Supported Supported Supported Supported Supported
WAS Network Deployment V6.0.1 Supported Supported Supported Supported Supported Supported Supported Supported Supported
WAS clients V6.0.1 Supported Supported Supported Supported Supported Supported Supported Supported Supported
WAS Version 6.0.2 Supported Supported Supported Supported Supported Supported Supported Supported Supported
WAS Network Deployment V6.0.2 Supported Supported Supported Supported Supported Supported Supported Supported Supported
WAS clients V6.0.2 Supported Supported Supported Supported Supported Supported Supported Supported Supported
WAS Version 6.1 Supported Supported Supported Supported Supported Supported Supported Supported Supported
WAS Network Deployment V6.1 Supported Supported Supported Supported Supported Supported Supported Supported Supported
WAS clients V6.1 Supported Supported Supported Supported Supported Supported Supported Supported Supported

In addition to multiversion coexistence, WAS also lets you install multiple times on one machine (multiple installation instances) or install once and have multiple profiles. Multiple V6.1 installation instances on one machine include the following combinations:

Multiple appserver profiles from multiple installations of the WAS product

Multiple appserver profiles from a single installation of the WAS product

Restrictions on using mixed-release cells:

You can upgrade a portion of the nodes in a cell to WebSphere Application Server V6.1 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 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. For details, see Creating appservers. There might also be restrictions on creating clusters and cluster members. For details, see Creating clusters.

A WAS V6.1 deployment cell can contain mixed releases of V5.x or 6.0.x nodes, but there is no mixed-node management support for V6.0.0.x and V6.0.1.x. The V6.1 migration tools still migrate these nodes during deployment-manager migration, but they issue a warning message that the nodes cannot be managed by the V6.1 deployment manager. You can then do one of the following based on your needs:

Upgrade all V6.0.0.x and V6.0.1.x nodes to at least Version 6.0.2. This will allow them to be administered by a V6.1 deployment manager.

Immediately migrate these nodes to V6.1.

Related tasks

Setting up V5.x or 6.0.x and V6.1 coexistence
Setting up V6.1 coexistence
Creating profiles through the graphical user interface

Related information

Coexisting

Installed product	WebSphere Application Server V6.1 clients
WAS Version 5.0	Supported
WAS Network Deployment V5.0	Supported
WebSphere Business Integration Server Foundation V5.0	Supported
WAS Version 5.0.1	Supported
WAS Network Deployment V5.0.1	Supported
WebSphere Business Integration Server Foundation V5.0.1	Supported
WAS Version 5.0.2	Supported
WAS Network Deployment V5.0.2	Supported
WebSphere Business Integration Server Foundation V5.0.2	Supported
WAS Version 5.1	Supported
WAS Network Deployment V5.1	Supported
WAS Version 6.0	Supported
WAS Network Deployment V6.0	Supported
WAS Version 6.0.1	Supported
WAS Network Deployment V6.0.1	Supported
WAS Version 6.0.2	Supported
WAS Network Deployment V6.0.2	Supported

Installed product	WebSphere Application Server V5.x	WebSphere Application Server V6.0.x	WebSphere Application Server V6.1
Application Server	Network Deployment	Enterprise / WBISF	Application Server	Network Deployment	Express	Application Server	Network Deployment	Express
WAS Version 5.0	Supported	Supported	Supported	Supported	Supported	Supported	Supported	Supported	Supported
WAS Network Deployment V5.0	Supported	Supported	Supported	Supported	Supported	Supported	Supported	Supported	Supported
WAS Enterprise V5.0	Supported	Supported	Supported	Supported	Supported	Supported	Supported	Supported	Supported
WAS clients V5.0	Supported	Supported	Supported	Supported	Supported	Supported	Supported	Supported	Supported
WAS Version 5.0.1	Supported	Supported	Supported	Supported	Supported	Supported	Supported	Supported	Supported
WAS Network Deployment V5.0.1	Supported	Supported	Supported	Supported	Supported	Supported	Supported	Supported	Supported
WAS Enterprise V5.0.1	Supported	Supported	Supported	Supported	Supported	Supported	Supported	Supported	Supported
WAS clients V5.0.1	Supported	Supported	Supported	Supported	Supported	Supported	Supported	Supported	Supported
WAS Version 5.0.2	Supported	Supported	Supported	Supported	Supported	Supported	Supported	Supported	Supported
WAS Network Deployment V5.0.2	Supported	Supported	Supported	Supported	Supported	Supported	Supported	Supported	Supported
WAS Enterprise V5.0.2	Supported	Supported	Supported	Supported	Supported	Supported	Supported	Supported	Supported
WAS clients V5.0.2	Supported	Supported	Supported	Supported	Supported	Supported	Supported	Supported	Supported
WAS Version 5.1	Supported	Supported	Supported	Supported	Supported	Supported	Supported	Supported	Supported
WAS Network Deployment V5.1	Supported	Supported	Supported	Supported	Supported	Supported	Supported	Supported	Supported
WAS Integration Server V5.1	Supported	Supported	Supported	Supported	Supported	Supported	Supported	Supported	Supported
WAS clients V5.1	Supported	Supported	Supported	Supported	Supported	Supported	Supported	Supported	Supported
WAS Version 6.0.1	Supported	Supported	Supported	Supported	Supported	Supported	Supported	Supported	Supported
WAS Network Deployment V6.0.1	Supported	Supported	Supported	Supported	Supported	Supported	Supported	Supported	Supported
WAS clients V6.0.1	Supported	Supported	Supported	Supported	Supported	Supported	Supported	Supported	Supported
WAS Version 6.0.2	Supported	Supported	Supported	Supported	Supported	Supported	Supported	Supported	Supported
WAS Network Deployment V6.0.2	Supported	Supported	Supported	Supported	Supported	Supported	Supported	Supported	Supported
WAS clients V6.0.2	Supported	Supported	Supported	Supported	Supported	Supported	Supported	Supported	Supported
WAS Version 6.1	Supported	Supported	Supported	Supported	Supported	Supported	Supported	Supported	Supported
WAS Network Deployment V6.1	Supported	Supported	Supported	Supported	Supported	Supported	Supported	Supported	Supported
WAS clients V6.1	Supported	Supported	Supported	Supported	Supported	Supported	Supported	Supported	Supported