The design of the Hadoop system
In this section, we will discuss the design of Hadoop core components. Hadoop runs on a Java platform. Hadoop has the Hadoop Distributed File System or HDFS in its core as the distributed data storage system, and Map Reduce APIs that make possible distributed parallel processing of distributed data on HDFS. In addition to the Hadoop core components, we will cover the other essential components that perform crucial process coordination among the cluster of computers. The Hadoop ecosystem is undergoing a rapid change driven by community-based innovation.
Note
This book is on Hadoop 2.x and therefore Hadoop refers to Hadoop 2.x releases in this book. If we refer to the older versions of Hadoop then we will make it explicit. ...
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