Table of Contents

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  1. Preface
  2. Introduction to Informatica Big Data Management
  3. Mappings in the Hadoop Environment
  4. Mapping Sources in the Hadoop Environment
  5. Mapping Targets in the Hadoop Environment
  6. Mapping Transformations in the Hadoop Environment
  7. Processing Hierarchical Data on the Spark Engine
  8. Configuring Transformations to Process Hierarchical Data
  9. Processing Unstructured and Semi-structured Data with an Intelligent Structure Model
  10. Stateful Computing on the Spark Engine
  11. Monitoring Mappings in the Hadoop Environment
  12. Mappings in the Native Environment
  13. Profiles
  14. Native Environment Optimization
  15. Cluster Workflows
  16. Connections
  17. Data Type Reference
  18. Function Reference
  19. Parameter Reference

Parameters Overview

Parameters Overview

A mapping parameter represents a constant value that you can change between mapping runs. Use parameters to change the values of connections, file directories, expression components, port lists, port links, and task properties. You can use system parameters or user-defined parameters.
System parameters are built-in parameters for a Data Integration Service. System parameters define the directories where the Data Integration Service stores log files, cache files, reject files, source files, target files, and temporary files. An administrator defines the system parameter default values for a Data Integration Service in the Administrator tool.
User-defined parameters are parameters that you define in transformations, mappings, or workflows.
Create user-defined parameters to rerun a mapping with different connection, flat file, cache file, temporary file, expression, ports, or reference table values.
You can override parameter values using a parameter set or a parameter file. A parameter set is a repository object that contains mapping parameter values. A parameter file is an XML file that contains parameter values. When you run the mapping with a parameter set or a parameter file, the Data Integration Service uses the parameter values defined in the parameter set or parameter file instead of the default parameter values you configured in the transformation, mapping, or workflow.
You can use the following parameters to represent additional properties in the Hadoop environment:
Parameters for sources and targets
You can use parameters to represent additional properties for the following big data sources and targets:
  • Complex file
  • Flat file
  • HBase
  • HDFS
  • Hive
Parameters for the Hadoop connection and run-time environment
You can set the Hive version, run-time environment, and Hadoop connection with a parameter.
For more information about mapping parameters, see the
Informatica Developer Mapping Guide
.


Updated October 23, 2019