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What is the difference between Hadoop 1.0 and Hadoop 2.0?
Hadoop 1.0 was MapReduce-based only. However, Hadoop 2.0 comes with an efficient processing model, including YARN. Since Hadoop 1.0 comprises MapReduce tasks, it has limited processing capability. On the other hand, Hadoop 2.0 has a large-scale processing system. To get an insightful overview of the Hadoop module and architecture, read this blog.
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