System Parameters

System parameters are constant values that define the directories where the Data Integration Service stores cache files, reject files, source files, target files, log files, and temporary files.

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."

System Parameter	Type	Description
CacheDir	String	Default directory for index and data cache files.
LogDir	String	Default directory for Mapping task log files.
RejectDir	String	Default directory for reject files.
SourceDir	String	Default directory for source files.
TargetDir	String	Default directory for target files.
TempDir	String	Default directory for temporary files.
ApplicationName	String	Name of the application
ExecutionEnvironment	String	Hadoop or Native environment.
MappingName	String	Name of the mapping that is running.
MappingRunStartTime	Date/time	The start time of the mapping that is running.
ServiceName	String	The Data Integration Service name.
UserName	String	Name of the user that is running the mapping.