Installing CA Gen on UNIX and Linux › Naming Considerations

Naming Considerations

For releases before AllFusion Gen 7, administrators used UNIX commands to install and remove the CSE and the IT on UNIX systems. Software components that are installed with USD have no knowledge of other components installed using UNIX commands. USD installs and uninstalls without knowledge or concern for releases that precede AllFusion Gen 7.

USD can install multiple instances of one or more releases of CA Gen, allowing you to install and test the new release without interrupting the use of the earlier release. If you need multiple configurations of a single release, you can install two instances of the same release.

You can leave earlier release in place when installing CA Gen Release 8.5 unless you install to the same directory. In this case, remove the earlier release before installing another release. USD informs the user and abandons the installation if you attempt an update to the same directory.

The CA Gen USD installation supports multiple instances of Gen by using a unique name and location for each instance. It effectively creates separate products whose name is the concatenation of CA Gen and the unique instance name that is separated by a period. Include the unique instance name on the command line every time you execute the setup and USD utility programs. The syntax is:

./setup -I instance_name

instance_name is any unique text string. The -I argument changes the product name that is registered with the CA installation subsystem to CAGen.<instance_name>.

Components that are installed using USD must conform to certain practices:

• Instance names must be unique across releases. Within a release, the IT and the CSE can use the same named instance, even when installed at different times. The single unnamed instance is the same as any named instance except omit the -I argument.
• Since all instance names and locations must be unique, to reuse the name or the location, uninstall the previous instance before setup can create the new instance. The setup program enforces this restriction to prevent updates to earlier releases.

  Note: When you uninstall an instance, setup includes a checkbox to save the configuration files, including unmodified configuration files. Setup checks the box by default. If you uncheck the box, uninstall removes all files including the configuration files.

  Starting with AllFusion Gen 7.5, during a subsequent install, the installation automatically renames configuration file in the target install location to prevent overwriting these files. A modification to a configuration file requires the same modification to the newly installed version of that file.

For information about the configuration files the IT uses, see the UNIX and Linux Implementation Toolset Guide.

• CA Gen does not support upgrade in place. You cannot install CA Gen Release 8.5 as an upgrade to AllFusion Gen 7.5 or AllFusion Gen 7.6.
• After installing a named or unnamed instance, remove the instance before you can change its location.

Note: To simplify future upgrades, set up a consistent naming convention for your IT and CSE instances.