Define Combiner 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

The Combiner, also known as the "Mini-Reducer," summarises the Mapper output record using the same Key before handing it to the Reducer. When we execute a MapReduce task on a huge dataset. A...

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