The background of Hadoop
We're assuming that most readers will have a little familiarity with Hadoop, or at the very least, with big data-processing systems. Consequently, we won't give a detailed background as to why Hadoop is successful or the types of problem it helps to solve in this book. However, particularly because of some aspects of Hadoop 2 and the other products we will use in later chapters, it is useful to give a sketch of how we see Hadoop fitting into the technology landscape and which are the particular problem areas where we believe it gives the most benefit.
In ancient times, before the term "big data" came into the picture (which equates to maybe a decade ago), there were few options to process datasets of sizes in terabytes ...
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