What are the basic phases of reducer in Hadoop?

题目类型: 技术面试题

这是一道技术面试题，常见于澳洲IT公司面试中。

难度: medium

标签: Data Engineer

参考答案摘要

A Reducer in Hadoop has three major phases: Shuffle: Reducer duplicates the sorted output from each Mapper during this step. Sort: During this stage, the Hadoop framework sorts the input to the Reduce...

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