Updating aim overwrite
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.
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.
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.
Both Update and Update If return the modified data source as a table.If a source file is (re)moved before it is copied, the copy will fail with a File Not Found Exception.Please refer to the detailed Command Line Reference for information on all the options available in Dist Cp.You must use either function in a behavior formula.When used with a data source, these functions can't be delegated.