Coexistence support

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

[AIX HP-UX Linux Solaris Windows] Coexistence, as it applies to WebSphere Application Server products, is the ability of multiple installations of WebSphere Application Server to run 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.

[AIX HP-UX Linux Solaris Windows] Version 6.0.x WebSphere Application Server products can coexist with the following supported versions:
  • IBM WebSphere Application Server Advanced Server Single Edition and Advanced Edition Version 4.0.2 and later
  • IBM WebSphere Business Integration Server Foundation Edition Version 4.1 and later
  • IBM WebSphere Application Server Version 5.0 and later
  • IBM WebSphere Application Server Network Deployment Version 5.0 and later
  • IBM WebSphere Application Server Enterprise Version 5.0 and later
  • IBM WebSphere Application Server Version 5.1.0 and later
  • IBM WebSphere Application Server Network Deployment Version 5.1.0 and later

[AIX HP-UX Linux Solaris Windows] All combinations of Version 4.0.x products, Version 5.x products, and Version 6.0.x products can coexist so long as there are no port conflicts.

[AIX HP-UX Linux Solaris Windows] Version 4.0.x and Version 5.x can coexist with the Version 6.0.x WebSphere Application Server clients:
Table 1. Multiversion WebSphere Application Server clients coexistence scenarios
Installed product WebSphere Application Server Version 6.0.x clients
IBM WebSphere Application Server Advanced Single Server Edition Version 4.0.2 and later Supported
IBM WebSphere Application Server Advanced Edition Version 4.0.2 and later Supported
IBM WebSphere Business Integration Server Foundation Edition Version 4.1 and later Supported
IBM WebSphere Application Server Version 5.0 Supported
IBM WebSphere Application Server Network Deployment Version 5.0 Supported
IBM WebSphere Business Integration Server Foundation Version 5.0 Supported
IBM WebSphere Application Server Version 5.0.1 Supported
IBM WebSphere Application Server Network Deployment Version 5.0.1 Supported
IBM WebSphere Business Integration Server Foundation Version 5.0.1 Supported
IBM WebSphere Application Server Version 5.0.2 Supported
IBM WebSphere Application Server Network Deployment Version 5.0.2 Supported
IBM WebSphere Business Integration Server Foundation Version 5.0.2 Supported
IBM WebSphere Application Server Version 5.1 Supported
IBM WebSphere Application Server Network Deployment Version 5.1 Supported
[AIX HP-UX Linux Solaris Windows] Version 4.0.x and Version 5.x products can coexist with Version 6.0.x products:
Table 2. Multiversion coexistence scenarios
Installed product Version 5.x Version 6.0.x
Application Server Network Deployment Enterprise / WBISF Application Server Network Deployment Express
Advanced Single Server Edition Version 4.0.2 and later Supported Supported Supported Supported Supported Supported
Advanced Edition Version 4.0.2 and later Supported Supported Supported Supported Supported Supported
Enterprise Edition Version 4.1 and later Supported Supported Supported Supported Supported Supported
WebSphere Application Server clients Version 4.0.x Supported Supported Supported Supported Supported Supported
WebSphere Application Server Version 5.0 Supported Supported Supported Supported Supported Supported
Network Deployment Version 5.0 Supported Supported Supported Supported Supported Supported
Enterprise Version 5.0 Supported Supported Supported Supported Supported Supported
WebSphere Application Server clients Version 5.0 Supported Supported Supported Supported Supported Supported
WebSphere Application Server Version 5.0.1 Supported Supported Supported Supported Supported Supported
Network Deployment Version 5.0.1 Supported Supported Supported Supported Supported Supported
Enterprise Version 5.0.1 Supported Supported Supported Supported Supported Supported
WebSphere Application Server clients Version 5.0.1 Supported Supported Supported Supported Supported Supported
WebSphere Application Server Version 5.0.2 Supported Supported Supported Supported Supported Supported
Network Deployment Version 5.0.2 Supported Supported Supported Supported Supported Supported
Enterprise Version 5.0.2 Supported Supported Supported Supported Supported Supported
WebSphere Application Server clients Version 5.0.2 Supported Supported Supported Supported Supported Supported
WebSphere Application Server Version 5.1 Supported Supported Supported Supported Supported Supported
Network Deployment Version 5.1 Supported Supported Supported Supported Supported Supported
Integration Server Version 5.1 Supported Supported Supported Supported Supported Supported
WebSphere Application Server clients Version 5.1 Supported Supported Supported Supported Supported Supported
[AIX HP-UX Linux Solaris Windows] 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 6.0.x instances on one machine include the following combinations:
  • Multiple application server instances from multiple installations of the WebSphere Application Server product
  • Multiple Application Server profiles from a single installation of the WebSphere Application Server product

[z/OS] Coexistence, as it applies to WebSphere Application Server for z/OS products, is the ability of multiple customizations (nodes) of WebSphere Application Server to run on the same z/OS image or sysplex at the same time. You can install WebSphere Application Server for z/OS once and customize it many times; that is, you can create many nodes from one installation. This installation can be shared by all LPARs (logical partitions) in the same sysplex.

[z/OS] When setting up your system for coexistence, you need to be aware of the following points:
General coexistence:
  • Multiple WebSphere Application Server for z/OS cells can coexist in the same sysplex.
  • Multiple WebSphere Application Server for z/OS nodes can coexist on the same LPAR.
  • WebSphere Application Server for z/OS Version 5.0.x, Version 5.1, and Version 6.0.x nodes can all coexist in the same cell.
  • No two cells can have the same cell short name.
  • Separate cells need separate HFS mount points and JCL procedures.
  • If your Version 5.x load modules reside in LPA/LNKLST, you will need to place the Version 6.0.x modules in STEPLIB in order to coexist.
  • You need to determine port conflicts that might occur when earlier versions coexist with Version 6.0.x.
Version 5.0.x and Version 5.1 coexistence:
  • WebSphere Application Server for z/OS Version 5.0.x and Version 5.1 nodes can coexist in the same cell if and only if they are on different LPARs.
  • WebSphere Application Server for z/OS Version 5.0.x and Version 5.1 nodes can coexist on the same LPAR if and only if they are in different cells.
Version 5.0.x and Version 6.0.x coexistence:
  • WebSphere Application Server for z/OS Version 5.0.x and Version 6.0.x nodes can coexist in the same cell if and only if they are on different LPARs.
    Note: A service level of at least W502025 is required for Version 5.0.x nodes to coexist with Version 6.0.x in the same cell
  • WebSphere Application Server for z/OS Version 5.0.x and Version 6.0.x nodes can coexist on the same LPAR if and only if they are in different cells.
Version 5.1 and Version 6.0.x coexistence:
  • WebSphere Application Server for z/OS Version 5.1 and Version 6.0.x nodes can coexist on the same LPAR in the same cell or in different cells.
    Note: A service level of at least W510207 is required for Version 5.1 nodes to coexist with Version 6.0.x in the same cell.



Related tasks
[AIX HP-UX Linux Solaris Windows] Setting up Version 4.0.x and Version 6.0.x coexistence
[AIX HP-UX Linux Solaris Windows] Setting up Version 5.x and Version 6.0.x coexistence
[AIX HP-UX Linux Solaris Windows] Setting up Version 6.0.x coexistence
Reference topic    

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