MapReduce programming -- merging and de duplication of files
catalogue
1, Problem description
2, Specific code
3, Specific operation
1, Problem description
Merge multiple input files, eliminate the duplicate contents, and output the duplicated contents to one file.
Main idea: according to the process characteristics of reduce, the input value set will be automatically ...
Posted by PHP-Nut on Tue, 16 Nov 2021 11:53:04 +0100