Multiple installations
On UNIX, Linux®, and Windows, it is possible to have more than one copy of IBM® MQ on a system.
- Keep the simplicity of maintaining and managing a single installation of IBM MQ on a machine.
- Take advantage of the flexibility that is offered by enabling multiple IBM MQ installations.
Decisions to make before installing
- Will you have a copy of IBM WebSphere MQ 7.0.1 on the system?
- When IBM WebSphere MQ 7.0.1 at fix pack 6, or later, is installed on the system, there are a number of restrictions to consider:
- On UNIX and Linux systems, IBM WebSphere MQ 7.0.1 must be installed in the default location.
- IBM WebSphere MQ 7.0.1 must be the first installation on a system. You cannot install IBM WebSphere MQ 7.0.1 after installing Version 7.1, or later. If you uninstall version Version 7.0.1, it cannot be reinstalled while a later version of IBM MQ is installed.
- IBM WebSphere MQ 7.0.1 is automatically the primary installation. You cannot select another installation as the primary installation while IBM WebSphere MQ 7.0.1 is installed.
- Where will you install each copy of IBM MQ ?
- You can choose the installation location for your installations at Version 7.1, or later. For more information, see Choosing an installation location.
- Do you need a primary installation?
- A primary installation is an installation to which system-wide locations refer.
For more information, see Choosing a primary installation.
- How will your applications connect?
- You need to consider how your applications locate the appropriate IBM MQ libraries. For more information, see Connecting applications in a multiple installation environment, and Connecting .NET applications in a multiple installation environment.
- Do your existing exits need changing?
- If IBM MQ is not installed in the default location, your exits need to be updated. For more information, see Writing exits and installable services on UNIX, Linux and Windows .
- Which queue manager will be associated with which installation?
- Each queue manager is associated with a particular installation. The installation that a queue manager is associated with limits that queue manager so that it can be administered only by commands from that installation. For more information, see Associating a queue manager with an installation.
- How will you set up your environment to work with each installation?
- With multiple installations on a system, you need to consider how you will work with particular installations, and how you will issue commands from that installation. You can either specify the full path to the command, or you can use the setmqenv or crtmqenv command to set environment variables. Setting the environment variables allows you to omit the path to the commands for that installation. For more information, see setmqenv, and crtmqenv.
If you have existing installations of IBM MQ and you want to use the multiple installation capability to migrate from one version of IBM MQ to another version, see Multi-installation queue manager coexistence on UNIX, Linux, and Windows , unless you are using HP Integrity NonStop Server. In the case of HP Integrity NonStop Server, see Planning your installation on HP Integrity NonStop Server instead.
The IBM message service client for .NET support pack and multiple installations
For multiple version support, on IBM WebSphere MQ 7.1 or later, the Java and .NET Messaging and Web Services feature must be installed with the IBM MQ product. For more information about installing the .NET feature, see Installing IBM MQ classes for .NET.