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It uses Map Reduce to effect its distribution, error handling and recovery, and reporting.
It expands a list of files and directories into input to map tasks, each of which will copy a partition of the files specified in the source list.
Update and Overwrite options warrant special attention, since their handling of source-paths varies from the defaults in a very subtle manner.
Use the Update If function to modify one or more values in one or more records that match one or more conditions.
The condition can be any formula that results in a true or false and can reference columns of the data source by name.
New paradigms have been introduced to improve runtime and setup performance, while simultaneously retaining the legacy behaviour as default.
This document aims to describe the design of the new Dist Cp, its spanking new features, their optimal use, and any deviance from the legacy implementation.