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Installing Multiple Instances of Siebel Business Applications

This topic is part of General Considerations in Planning Your Siebel Deployment.

This topic describes issues in installing multiple instances of similar or dissimilar versions of Siebel Business Applications on the same machine.

Installing Multiple Instances of Similar Versions of Siebel Business Applications

By default, the Siebel installers automatically install Siebel software in unique directory names that will not conflict with other Siebel software components that you install on the same machine. To install another instance of the same version of a product on a single machine (where applicable), specify a custom installation path.

However, installing multiple instances of some products may cause problems. For example:

• You cannot install multiple instances of the same version of Siebel Gateway Name Server on the same machine. The reason for this is that installing and configuring the Siebel Gateway Name Server creates a service which cannot coexist in multiple instances for different installations.
• Restrictions apply for installing multiple instances of SWSE. For details, see Requirements for SWSE Installation and Configuration.
• Restrictions apply for installing multiple instances of Siebel Tools, where Siebel Business Rules Developer is also installed. For details, see Requirements for Siebel Tools Installation.

For related considerations, see also About Installing Siebel Releases and Planning Topologies.

NOTE:  In this context, same version refers to all releases sharing the same first two digits—such as 8.0, 8.0.0.1, 8.0.0.2, 8.0.1 (if available), and so on. Each product instance of the same version would be installed to the same default installation path, unless you specify a custom path. A three-digit release can be installed as a maintenance release if the prior release of the same series is already installed. For example, if available, 8.0.1 could be installed as a maintenance release if 8.0 or 8.0.0.x is already installed.

Components of the same Siebel Enterprise Server that you install on the same machine must be installed into the same root directory. These components include Siebel Gateway Name Server, Siebel Server, Database Configuration Utilities, and EAI Connector. See also File and Directory Naming Conventions.

NOTE:  You cannot install additional Siebel Enterprise Server components into a root directory after applying a patch. You can install additional languages into a root directory after applying a patch, but you must reapply the patch afterwards.

Installing Multiple Instances of Dissimilar Versions of Siebel Business Applications

Multiple versions of Siebel components can be installed on the same machine. Sometimes you may need to do this as part of some upgrade scenarios. For more information about upgrading, see Siebel Database Upgrade Guide.

Use naming conventions for your installation directories that reflect the component and the version number being installed (the default installation directories already do this).

• If you install multiple versions of the Siebel Gateway Name Server on the same machine, you must install them in different directories and assign unique port numbers.

  For installation instructions, see Installing Siebel Enterprise Server and Related Components.

• If you install multiple versions of the Siebel Server on the same machine, you must install them in different directories (default installation directories are already different between versions).

  For installation instructions, see Installing Siebel Enterprise Server and Related Components.

• Restrictions apply for installing multiple instances of SWSE. For details, see Requirements for SWSE Installation and Configuration.