Table of Contents

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  1. Preface
  2. Analyst Service
  3. Catalog Service
  4. Content Management Service
  5. Data Integration Service
  6. Data Integration Service Architecture
  7. Data Integration Service Management
  8. Data Integration Service Grid
  9. Data Integration Service Applications
  10. Data Preparation Service
  11. Enterprise Data Lake Service
  12. Informatica Cluster Service
  13. Mass Ingestion Service
  14. Metadata Access Service
  15. Metadata Manager Service
  16. Model Repository Service
  17. PowerCenter Integration Service
  18. PowerCenter Integration Service Architecture
  19. High Availability for the PowerCenter Integration Service
  20. PowerCenter Repository Service
  21. PowerCenter Repository Management
  22. PowerExchange Listener Service
  23. PowerExchange Logger Service
  24. SAP BW Service
  25. Search Service
  26. System Services
  27. Test Data Manager Service
  28. Test Data Warehouse Service
  29. Web Services Hub
  30. Application Service Upgrade
  31. Appendix A: Application Service Databases
  32. Appendix B: Connecting to Databases from Windows
  33. Appendix C: Connecting to Databases
  34. Appendix D: Updating the DynamicSections Parameter of a DB2 Database

Reading Source Data

Reading Source Data

Mappings contain one or more target load order groups. A target load order group is the collection of source qualifiers, transformations, and targets linked together in a mapping. Each target load order group contains one or more source pipelines. A source pipeline consists of a source qualifier and all of the transformations and target instances that receive data from that source qualifier.
By default, the DTM reads sources in a target load order group concurrently, and it processes target load order groups sequentially. You can configure the order that the DTM processes target load order groups.
The following figure shows a mapping that contains two target load order groups and three source pipelines:
Target Load Order Group 1 contains Pipeline A and Pipeline B. Pipeline A, and Pipeline B contain different sources, Source A and Source B, respectively, and Source Qualifier transformations. The pipelines share some transformations, Target 1, and Target 2. Target Load Order Group 2 contains Pipeline C. Pipeline C contains Source C, different transformations, and Target 3.
In the mapping, the DTM processes the target load order groups sequentially. It first processes Target Load Order Group 1 by reading Source A and Source B at the same time. When it finishes processing Target Load Order Group 1, the DTM begins to process Target Load Order Group 2 by reading Source C.