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

Hive Engine Architecture

Hive Engine Architecture

The Data Integration Service can use the Hive engine to run Model repository mappings or profiles on a Hadoop cluster.
To run a mapping or profile on the Hive engine, the Data Integration Service creates HiveQL queries based on the transformation or profiling logic. The Data Integration Service submits the HiveQL queries to the Hive driver. The Hive driver converts the HiveQL queries to MapReduce or Tez jobs, and then sends the jobs to the Hadoop cluster.
Effective in version 10.2.1, the MapReduce mode of the Hive run-time engine is deprecated, and Informatica will drop support for it in a future release. The Tez mode remains supported.
The Tez engine can process jobs on Hortonworks HDP, Azure HDInsight, and Amazon Elastic MapReduce. To use Cloudera CDH including Apache Hadoop, the jobs can process only on the MapReduce engine.
When you run a mapping on the Spark engine that launches Hive tasks, the mapping runs either on the MapReduce or on the Tez engines. For example, Hortonworks HDP cluster launches Hive tasks on MapReduce or Tez engines. A Cloudera CDH cluster launches Hive tasks on MapReduce engine.
The following image shows the architecture of how a Hadoop cluster processes MapReduce or Tez jobs sent from the Hive driver:
The following events occur when the Hive driver sends jobs to the Hadoop cluster:
  1. The Hive driver sends the MapReduce or Tez jobs to the Resource Manager in the Hadoop cluster.
  2. The Resource Manager sends the jobs request to the Node Manager that retrieves a list of data nodes that can process the MapReduce or Tez jobs.
  3. The Node Manager assigns MapReduce or Tez jobs to the data nodes.
  4. The Hive driver also connects to the Hive metadata database through the Hive metastore to determine where to create temporary tables. The Hive driver uses temporary tables to process the data. The Hive driver removes temporary tables after completing the task.


Updated October 23, 2019