As a newbie when I tried to learn Hadoop the main big obstacle to cross is "where to begin?" whether I need to brush up my java which I learnt years back in college or go over the numerous videos and blogs available on the internet. I tried to read variety of books especially "Hadoop - the definitive guide" and brushed over "Hadoop in action".
Since the aura around Hadoop says its high tech and complex we expect the book to be a tome. At first this book didnt gave a good impression because of its size.. But what caught me is the text " I won’t focus on the nitty-gritty details. Instead I will provide the information that will allow you to quickly create useful code, along with more advanced topics most often encountered in practice." in the first chapter. And the book lives to this promise.
Im sure even if you are a newbie and has good programming knowledge on any language you can come out writing some useful map-reduce programs. The book size is comparitively small so you can read through and do some practise programs within a week.
Most of the example programs are written in Java with some introduction to python and streaming programs. After reading this book Im inclined to code on Java. But currently my job demands to do in python(which is so cool!).
If you are a newbie to hadoop I would strongly recommend this but if you want to master Hadoop and looking for a reference material this is not for you..
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