Introduction
This book is designed to be a concise guide to using the Hadoop software. Despite being around for more than half a decade, Hadoop development is still a very stressful yet very rewarding task. The documentation has come a long way since the early years, and Hadoop is growing rapidly as its adoption is increasing in the Enterprise. Hadoop 2.0 is based on the YARN framework, which is a significant rewrite of the underlying Hadoop platform. It has been our goal to distill the hard lessons learned while implementing Hadoop for clients in this book. As authors, we like to delve deep into the Hadoop source code to understand why Hadoop does what it does and the motivations behind some of its design decisions. We have tried to share this ...
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