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

Block Processing

Block Processing

The DTM reads and processes a block of rows at a time. The number of rows in the block depend on the row size and the DTM buffer size. In the following circumstances, the DTM processes one row in a block:
  • Log row errors. When you log row errors, the DTM processes one row in a block.
  • Connect CURRVAL. When you connect the CURRVAL port in a Sequence Generator transformation, the session processes one row in a block. For optimal performance, connect only the NEXTVAL port in mappings.
  • Configure array-based mode for Custom transformation procedure. When you configure the data access mode for a Custom transformation procedure to be row-based, the DTM processes one row in a block. By default, the data access mode is array-based, and the DTM processes multiple rows in a block.