Hadoop 2-mapreduce details
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Java
This article is about Hadoop 2 MapReduce version 2.0 will be explained in detail. Please pay attention to the version, because the source code may be different for different versions of Hadoop.
The following is the outline of this article:
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1. Obtain source code
2. Wordcount case analysis
Before making a detailed explanation, let's take a look at an example, that is, there are some contents in a file
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