You can install a Version 6.0.x product to coexist with another installation instance of Version 5.x.
Before you begin
After installing the WebSphere Application Server product, you can install it again on the same machine.Why and when to perform this task
Each installation of the base product is a stand-alone application server (server1) with its own set of unique configuration files.
Each installation of the Network Deployment product can be a stand-alone deployment manager (dmgr) with its own set of unique configuration files for its cell, a managed node, or a stand-alone application server.
The deployment manager and the application server have two port conflicts in the default configuration settings for both products. Each product is configured to use port 9060 in Version 6.0.x (9090 in Version 5.x) as the administrative console port and port 9043 as the administrative console secure port by default. You should not run both the deployment manager and the WebSphere Application Server on the same production machine unless you have a machine with the capacity to handle the cumulative requirements of both products. However, if you do so, select the coexistence option during installation to change these port settings. There are no other port conflicts if you install a total of two instances, one base WebSphere Application Server product and one Network Deployment product.
If you install more than two instances, the third and subsequent installations require that you change all port numbers on the coexistence panel, to avoid potential conflicts.
When you install any product a second time, the last installation is the one that is displayed in the registry.
Suppose you have installed three instances of the base WebSphere Application Server product. You use the remove program function of the operating system to uninstall the registered third copy of the base product. A registry record no longer exists that indicates the existence of the other two installation instances. Other applications cannot use a query of the operating system registry to detect the presence of either base WebSphere Application Server product instance.
The Creating profiles through the graphical user interface article describes installing the WebSphere Application Server base or Network Deployment product once and creating multiple profiles.
Use the following procedure to install multiple installation instances.
Steps for this task
What to do next
Return to Migrating and coexisting to continue.Related tasks
Creating profiles through the graphical user interface
Related reference
Port number settings in WebSphere Application Server versions