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. Deduplicate transformation
  9. Expression transformation
  10. Filter transformation
  11. Hierarchy Builder transformation
  12. Hierarchy Parser transformation
  13. Hierarchy Processor transformation
  14. Input transformation
  15. Java transformation
  16. Java transformation API reference
  17. Joiner transformation
  18. Labeler transformation
  19. Lookup transformation
  20. Mapplet transformation
  21. Normalizer transformation
  22. Output transformation
  23. Parse transformation
  24. Python transformation
  25. Rank transformation
  26. Router transformation
  27. Rule Specification transformation
  28. Sequence Generator transformation
  29. Sorter transformation
  30. SQL transformation
  31. Structure Parser transformation
  32. Transaction Control transformation
  33. Union transformation
  34. Velocity transformation
  35. Verifier transformation
  36. 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.