Preface
A pache Hadoop is a popular open-source software framework for storing and processing large sets of data on a platform consisting of clusters of commodity hardware. The main idea behind Hadoop is to move computation to the data, instead of the traditional way of moving data to computation. Scalability lies at the heart of Hadoop, and one of the big reasons for its considerable popularity in the big data world we live in today is its extreme cost effectiveness owing to the use of commodity servers and open-source software.
I started working on this book in the fall of 2014. Hadoop 2 had come out a few months earlier, and there were numerous interesting changes in the Hadoop architecture in the new release. There was one very good book ...
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