Partitioning environment variables in DataStage

The following environment variables are concerned with how DataStage® automatically partitions data.

APT_NO_PART_INSERTION environment variable in DataStage

Set the APT_NO_PART_INSERTION environment variable to prevent DataStage automatically inserting partition components in your application to optimize the performance of the stages in your job.

APT_NO_PARTSORT_OPTIMIZATION environment variable in DataStage

Set this environment variable to disable optimizations that were introduced in DataStage, Version 8.7.

If APT_NO_PARTSORT_OPTIMIZATION is defined, these optimizations are disabled:
  • repartitioning on all input links even if one input link requires a repartition
  • if a user-defined tsort does not fulfill the requirements of the downstream operator, replacing the user-defined tsort with a new tsort instead of inserting an extra tsort after the user-defined tsort