[pit filling trip hadoop-05] Hadoop 2.10.1 Mr custom sorting grouping FlowSumArea/SortMR Partitioner/ WritableComparable inverted index

job submission process - supplemental map task returns the processing result to MRAPPmaster reduce task combines the map processing results, processes the operations, and then outputs them 1. Steps to realize Zoning: 1.1 First analyze the specific business logic to determine how many partitions there are 1.2 First write a class that inher ...

Posted by zhabala on Mon, 01 Nov 2021 01:05:59 +0100