If the session uses one flat file in the master pipeline and multiple flat files in the detail pipeline, use one partition for the master source and
n
partitions for the detail file sources (1:
n
). Add a pass-through partition point at the detail Source Qualifier transformation. Do not add a partition point at the Joiner transformation. The Integration Service maintains the sort order when you create one partition for the master source because it does not redistribute sorted data among partitions.