Table of Contents

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  1. Preface
  2. Transformations
  3. Source transformation
  4. Target transformation
  5. Aggregator transformation
  6. Cleanse transformation
  7. Data Masking transformation
  8. Data Services transformation
  9. Deduplicate transformation
  10. Expression transformation
  11. Filter transformation
  12. Hierarchy Builder transformation
  13. Hierarchy Parser transformation
  14. Hierarchy Processor transformation
  15. Input transformation
  16. Java transformation
  17. Java transformation API reference
  18. Joiner transformation
  19. Labeler transformation
  20. Lookup transformation
  21. Machine Learning transformation
  22. Mapplet transformation
  23. Normalizer transformation
  24. Output transformation
  25. Parse transformation
  26. Python transformation
  27. Rank transformation
  28. Router transformation
  29. Rule Specification transformation
  30. Sequence Generator transformation
  31. Sorter transformation
  32. SQL transformation
  33. Structure Parser transformation
  34. Transaction Control transformation
  35. Union transformation
  36. Velocity transformation
  37. Verifier transformation
  38. Web Services transformation

Transformations

Transformations

Sorter caches

Sorter caches

The
mapping
task passes all incoming data into the Sorter transformation before it performs the sort operation. The
mapping
task uses cache memory to process Sorter transformations. If the
mapping
task cannot allocate enough memory, the mapping fails.
By default, the
mapping
task determines the cache size at run time. Before starting the sort operation, the
mapping
task allocates the amount of memory configured for the Sorter cache size.
Configure the Sorter cache size with a value less than the amount of available physical RAM on the machine that hosts the Secure Agent. Allocate at least 16 MB (16,777,216 bytes) of physical memory to sort data with a Sorter transformation. When you allocate memory to the Sorter cache, consider other transformations in the mapping and the volume of data in the
mapping
task.
If the amount of incoming data is greater than the Sorter cache size, the
mapping
task temporarily stores data in the work directory. When storing data in the Sorter transformation work directory, the
mapping
task requires disk space of at least twice the amount of incoming data.
When you configure the tracing level to Normal, the
mapping
task writes the memory amount that the Sorter transformation uses to the session log.

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