partitions when you have one flat file in the master pipeline and multiple flat files in the detail pipeline. When you use 1:
partitions, the Integration Service maintains the sort order because it does not redistribute data among partitions. When you have one large flat file in each master and detail pipeline, use
partitions and add a pass-through or hash auto-keys partition at the Joiner transformation. When you add a hash auto-keys partition point, you must configure partitions to pass all sorted data in the first partition to maintain the sort order.