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