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title = "Hadoop in Practice - Alex Holmes"
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date = 2018-02-16
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[taxonomies]
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tags = ["books", "alex holmes", "reviews", "ti", "hadoop", "big data"]
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[GoodReads Summary](https://www.goodreads.com/book/show/13496907-hadoop-in-practice):
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Hadoop in Practice collects nearly 100 Hadoop examples and presents them in a
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problem/solution format. Each technique addresses a specific task you'll face,
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like querying big data using Pig or writing a log file loader. You'll explore
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each problem step by step, learning both how to build and deploy that specific
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solution along with the thinking that went into its design. As you work
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through the tasks, you'll find yourself growing more comfortable with Hadoop
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and at home in the world of big data.
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<!-- more -->
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{{ stars(stars=1) }}
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First thing: This is not about how to deal with Hadoop in a real environment;
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this a cookbook of recipes for working with Hadoop, some of them that you
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won't ever use.
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Second: The book uses a structure of
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"Explanation/Problem/Solution/Discussion". While the formula usually works,
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here is simply to add more words, because "Problem" is tailored exclusively to
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pair with the "Explanation". Not only that but "Solution" is basically a
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rehearsal of the "Explanation". Something like "Hadoop comes with it's own
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class for dealing with X file format; Problem: You have files in the X format
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and want to process them in Hadoop; Solution: Use the classes in Hadoop". This
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basically throw the whole structure under a bus.
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Third: There is plenty of code examples, and most are terrible. I don't mean
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"The code doesn't compile" or "It doesn't follow any good practices". I mean
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it uses some cutesy arrows to point to some pieces of code, which means it's
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an image instead of a real code, which means you can't copy'n'paste if needed.
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Also, those arrows could be easily be converted to comments, except most
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comments would fall into the "i = i + 1; // increments i" category -- useless
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comments pointing to obvious things. If it would tell you *why* you're
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incrementing "i" instead of what it's doing, it would at least be interesting.
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There may be something useful there if you have a specific problem with
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Hadoop. But if you have a single, specific problem, you'd Google it instead of
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buying a book with a bunch of other solutions that doesn't affect you.
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