You can install a Version 6.0.x product to coexist with another
installation instance of Version 5.x.
About this task
Each installation of the base product is a standalone application
server (server1) with its own set of unique configuration files.
Each
installation of the Network Deployment product can be a standalone deployment
manager (dmgr) with its own set of unique configuration files for its cell,
a managed node, or a standalone application server.
Be
aware of multiple instance limitations, between:
- The base WebSphere Application Server product and the Network Deployment
product.
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.
Reasons to use multiple installation instances include:
- You can achieve complete isolation between each WebSphere Application
Server instance. You can uninstall one instance independently of the others.
- You can
federate each installation instance of the base WebSphere Application Server
product to a deployment manager cell.
- You can install the base WebSphere Application Server more than once on
the same machine.
- You can
install Network Deployment more than once on the same machine.
- You can install
Version 5.x Network Deployment and the Version 6.0.x product on the same machine.
Reasons to not use multiple installation instances include:
- The machine might have a hard-disk space constraint.
- You can use the operating system registry to locate the last installed
instance of a WebSphere Application Server product only.
When you install
any product a second time, the last installation is the one that is displayed
in the registry.
- Uninstalling the last instance removes any record of the product 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.
Use the following procedure to install multiple installation instances.