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.

[AIX HP-UX Linux Solaris Windows] [iSeries] 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.

[z/OS] As it applies to WebSphere Application Server for z/OS products, coexistence primarily refers to 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 points in the following table
Table 1. WebSphere Application Server for z/OS Version 5.x, Version 6.0.x, and Version 6.1 multiversion coexistence scenarios
Coexistence Type Comments
General 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.x, Version 6.0.x, and Version 6.1 nodes can all coexist in the same cell.

No two cells can have the same cell short name.

Separate cells need separate configuration file system mount points and JCL procedures.

If your Version 5.x or 6.0.x load modules reside in LPA/LNKLST, you will need to place the Version 6.1 modules in STEPLIB in order to coexist. Only one release of WebSphere Application Server for z/OS can reside in LPA/LNKLST.

You need to determine port conflicts that might occur when earlier versions coexist with Version 6.1.

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.

Nodes can coexist on the same LPAR if and only if they are in different cells.

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.

Nodes can coexist on the same LPAR if and only if they are in different cells.

WebSphere Application Server for z/OS Version 5.0.x and Version 6.1 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 6.1 in the same cell.

Nodes can coexist on the same LPAR if and only if they are in different cells.

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.
WebSphere Application Server for z/OS Version 5.1 and Version 6.1 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 6.1 in the same cell.
WebSphere Application Server for z/OS Version 6.0.x and Version 6.1 Nodes can coexist on the same LPAR in the same cell or in different cells.
[AIX HP-UX Linux Solaris Windows] [iSeries] 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
  • [AIX HP-UX Linux Solaris Windows] IBM WebSphere Application Server Enterprise 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

[AIX HP-UX Linux Solaris Windows] [iSeries] 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.

[AIX HP-UX Linux Solaris Windows] [iSeries] WebSphere Application Server Version 5.x and Version 6.0.x clients can coexist with Version 6.1 clients.

[AIX HP-UX Linux Solaris Windows]
Table 2. WebSphere Application Server Version 5.x, Version 6.0.x, and Version 6.1 clients 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 Business Integration Server Foundation Version 5.0 Supported
WebSphere Application Server Version 5.0.1 Supported
WebSphere Application Server Network Deployment Version 5.0.1 Supported
WebSphere Business Integration Server Foundation Version 5.0.1 Supported
WebSphere Application Server Version 5.0.2 Supported
WebSphere Application Server Network Deployment Version 5.0.2 Supported
WebSphere Business Integration Server Foundation 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
[iSeries]
Table 3. 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

[AIX HP-UX Linux Solaris Windows] [iSeries] WebSphere Application Server Version 5.x and Version 6.0.x products can coexist with Version 6.1 products.

[AIX HP-UX Linux Solaris Windows]
Table 4. 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.x WebSphere Application Server Version 6.1
Application Server Network Deployment Enterprise / WBISF Application Server Network Deployment Express Application Server Network Deployment Express
WebSphere Application Server Version 5.0 Supported Supported Supported Supported Supported Supported Supported Supported Supported
WebSphere Application Server Network Deployment Version 5.0 Supported Supported Supported Supported Supported Supported Supported Supported Supported
WebSphere Application Server Enterprise Version 5.0 Supported Supported Supported Supported Supported Supported Supported Supported Supported
WebSphere Application Server clients Version 5.0 Supported Supported Supported Supported Supported Supported Supported Supported Supported
WebSphere Application Server Version 5.0.1 Supported 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 Supported
WebSphere Application Server Enterprise Version 5.0.1 Supported Supported Supported Supported Supported Supported Supported Supported Supported
WebSphere Application Server clients Version 5.0.1 Supported Supported Supported Supported Supported Supported Supported Supported Supported
WebSphere Application Server Version 5.0.2 Supported 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 Supported
WebSphere Application Server Enterprise Version 5.0.2 Supported Supported Supported Supported Supported Supported Supported Supported Supported
WebSphere Application Server clients Version 5.0.2 Supported Supported Supported Supported Supported Supported Supported Supported Supported
WebSphere Application Server Version 5.1 Supported Supported Supported Supported Supported Supported Supported Supported Supported
WebSphere Application Server Network Deployment Version 5.1 Supported Supported Supported Supported Supported Supported Supported Supported Supported
WebSphere Application Server Integration Server Version 5.1 Supported Supported Supported Supported Supported Supported Supported Supported Supported
WebSphere Application Server clients Version 5.1 Supported Supported Supported Supported Supported Supported Supported Supported Supported
WebSphere Application Server Version 6.0.1 Supported 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 Supported
WebSphere Application Server clients Version 6.0.1 Supported Supported Supported Supported Supported Supported Supported Supported Supported
WebSphere Application Server Version 6.0.2 Supported 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 Supported
WebSphere Application Server clients Version 6.0.2 Supported Supported Supported Supported Supported Supported Supported Supported Supported
WebSphere Application Server Version 6.1 Supported Supported Supported Supported Supported Supported Supported Supported Supported
WebSphere Application Server Network Deployment Version 6.1 Supported Supported Supported Supported Supported Supported Supported Supported Supported
WebSphere Application Server clients Version 6.1 Supported Supported Supported Supported Supported Supported Supported Supported Supported
[iSeries]
Table 5. 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
[AIX HP-UX Linux Solaris Windows] [iSeries] 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.

  • [AIX HP-UX Linux Solaris Windows] [iSeries] 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.
  • [z/OS] WebSphere Application Server Version 5.0.x cannot coexist with Version 6.0.x or Version 6.1 in the same cell on the same system image (LPAR).

    If you have multiple WebSphere Application Server Version 5.0.x nodes, including the deployment manager, on the same LPAR, all nodes must be migrated to WebSphere Application Server Version 6.1 at the same time. All nodes must be migrated sequentially before starting any WebSphere Application Server Version 6.1 node in the LPAR.

  • [z/OS] 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 6.0.1.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 6.0.1.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 tasks
[AIX HP-UX Linux Solaris Windows] Setting up Version 5.x or 6.0.x and Version 6.1 coexistence
[AIX HP-UX Linux Solaris Windows] Setting up Version 6.1 coexistence
Related information
Coexisting
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