Table of Contents

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

Metadata Access Service Architecture

Metadata Access Service Architecture

The Metadata Access Service receives requests from the Developer tool at design time to fetch an object metadata from a Hadoop cluster. The Metadata Access Service access the Hadoop cluster and provides the object metadata to the Developer tool.
The Metadata Access Service uses HTTP or HTTPS to communicate with Hadoop clusters and the Developer tool that sends metadata access requests. The following image shows how the Metadata Access Service components complete job requests:
  1. When importing a data object, the Developer tool sends a request to the Metadata Access Service along with the reference to the connection object.
  2. The Metadata Access Service accesses the cluster configuration defined in the connection object.
  3. The Metadata Access Service uses the Hadoop details from the cluster configuration and extracts the object metadata from the Hadoop cluster.
  4. The Metadata Access Service returns the metadata to the Developer tool.
  5. When you save the data object, the information is saved in the Model repository.