Define the values of some of the system parameters in the execution options for the Data Integration Service. An Administrator can update the values from the Administrator tool. The Data Integration Service determines the values of other system parameters at run time. You cannot override system parameter values in a parameter file or a parameter set.

You cannot create system parameters. The Developer tool provides a pre-defined list of system parameters that you can assign to a data object or transformation in a mapping. For example, when you create an Aggregator transformation, the cache directory system parameter is the default value assigned to the cache directory field in Informatica Administrator. If you want to use a different cache directory location, create a user-defined parameter and configure a default parameter value.

The Analyst tool displays the file path of system parameters in the following format:

$$[Parameter Name]/[Path]

. For example,

"$$SourceDir/ff_dept.txt."

The following table describes the system parameters: