This task describes how to install a product to coexist with another installation instance of Version 5.0.x.
Before you begin
After installing the WebSphere Application Server product, you can install it again on the same machine.You can also install the product multiple times on the same machine to support different installation instances of the base WebSphere Application Server product or the Network Deployment product.
Why and when to perform this task
Select the new installation option from the installation wizard panel, to install a new instance instead of adding features to the last installation, and to install into a separate installation directory. Select the coexistence option to provide nonconflicting ports.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 is a stand-alone deployment manager (dmgr) with its own set of unique configuration files for its cell.
Be aware of multiple instance limitations, between:
If you attempt to install V5.0.2 or V5.1 when V5.0.0 or V5.0.1 with the embedded messaging feature is already on the machine, you cannot select the embedded messaging feature. An incompatibility exists between the service level versions of embedded messaging. The level of embedded messaging for V5.0.0 and V5.0.1 differs from the level supported on V5.0.2 and V5.1. Upgrade the V5.0.0 or V5.0.1 node to V5.0.2 before installing another instance of V5.0.2 or V5.1.
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 9090 as the administrative console port and port 9043 as the administrative console secure port by default. It is not recommended that you run both the deployment manager and the 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.
You can install another instance of either product, by selecting to do so at the prompt, and by changing the installation directory.
The most recent installation is the only one in the operating system registry.
If you install more than two total instances of either product (more than one of each, or two of either and none of the other), the third and subsequent installations require that you change all port numbers on the coexistence panel to avoid potential conflicts.
To uninstall a product instance, always use the operating system remove program function, such as the Add/Remove program on Windows platforms. To uninstall an unregistered instance, use the Uninstall.exe or uninstall command in the _uninstall directory of the install_root that matches the instance you intend to remove.
Reasons to use multiple installation instances include:
Reasons to not use multiple installation instances include:
When you install any product a second time, the last installation is the one that appears 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 multiple Version 5 configuration instances topic describes installing the base WebSphere Application Server product or the Network Deployment product once and creating multiple configuration instances.
Use the following procedure to install multiple installation instances.
Steps for this task
What to do next
Return to Migrating and coexisting to continue.