Disable auto insertion of Partition and Sort

Partitioner insertion and sort insertion each make writing a flow easier by alleviating the need for a user to think about either partitioning or sorting data. By examining the requirements of operators in the flow, the parallel engine can insert partitioners, collectors and sorts as necessary within a data flow.

However, there are some situations where these features can be a avoided or not needed.
If data is pre-partitioned and pre-sorted, and the InfoSphere DataStage job is unaware of this, you could disable automatic partitioning and sorting for the whole job by setting the following environment variables while the job runs: