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Preface > The Examples in This Book

The Examples in This Book

All of the examples in this book are written for Hadoop version 1.0.3. MapReduce is a paradigm that is seen in a number of open source and commercial systems these days, but we had to pick one to make our examples consistent and easy to follow, so we picked Hadoop. Hadoop was a logical choice since it a widely used system, but we hope that users of MongoDB’s MapReduce and other MapReduce implementations will be able to extrapolate the examples in this text to their particular system of choice.

Caution

In general, we try to use the newer mapreduce API for all of our examples, not the deprecated mapred API. Just be careful when mixing code from this book with other sources, as plenty of people still use mapred and their APIs are not compatible.


  

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