Tag: mapreduce

4 articles

MapReduce JOIN Four Implementation Strategies

Deep dive into four JOIN strategies in MapReduce: Reduce-Side Join, Map-Side Join, Semi-Join, and Bloom Join principles and Java implementations, with analysis of applicable scenarios and performan...

Java Implementation MapReduce WordCount Complete Code

Implement Hadoop MapReduce WordCount from scratch: Hadoop serialization mechanism detailed explanation, writing Mapper, Reducer, Driver three components, Maven project configuration, local and clus...

Hadoop Cluster WordCount Distributed Computing Practice

Complete WordCount execution on Hadoop cluster: upload files to HDFS, submit MapReduce job, view running status through YARN UI, verify true distributed computing.

Hadoop JobHistoryServer Configuration and Log Aggregation

Configure Hadoop JobHistoryServer to record MapReduce job execution history, enable YARN log aggregation, view job details and logs via Web UI.