Table of Contents

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  1. Preface
  2. Working with Transformations
  3. Aggregator Transformation
  4. Custom Transformation
  5. Custom Transformation Functions
  6. Data Masking Transformation
  7. Data Masking Examples
  8. Expression Transformation
  9. External Procedure Transformation
  10. Filter Transformation
  11. HTTP Transformation
  12. Identity Resolution Transformation
  13. Java Transformation
  14. Java Transformation API Reference
  15. Java Expressions
  16. Java Transformation Example
  17. Joiner Transformation
  18. Lookup Transformation
  19. Lookup Caches
  20. Dynamic Lookup Cache
  21. Normalizer Transformation
  22. Rank Transformation
  23. Router Transformation
  24. Sequence Generator Transformation
  25. Sorter Transformation
  26. Source Qualifier Transformation
  27. SQL Transformation
  28. Using the SQL Transformation in a Mapping
  29. Stored Procedure Transformation
  30. Transaction Control Transformation
  31. Union Transformation
  32. Unstructured Data Transformation
  33. Update Strategy Transformation
  34. XML Transformations

Transformation Guide

Transformation Guide

Concurrent Caches

Concurrent Caches

You can configure the Integration Service to create lookup caches concurrently. You may be able to improve session performance using concurrent caches. Performance may especially improve when the pipeline contains an active transformations upstream of the Lookup transformation. You may want to configure the session to create concurrent caches if you are certain that you will need to build caches for each of the Lookup transformations in the session.
When you configure the Lookup transformation to create concurrent caches, it does not wait for upstream transformations to complete before it creates lookup caches, and it does not need to finish building a lookup cache before it can begin building other lookup caches.
The following figure shows lookup transformation caches built concurrently:
The mapping contains a source, source qualifier, Aggregator transformation, two Lookup transformations, and a target.
When you run the session, the Integration Service builds the Lookup caches concurrently. It does not wait for upstream transformations to complete, and it does not wait for other Lookup transformations to complete cache building.
You cannot process caches for unconnected Lookup transformations concurrently.
To configure the session to create concurrent caches, configure a value for the session configuration attribute, Additional Concurrent Pipelines for Lookup Cache Creation.

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