November 2014
Beginner to intermediate
408 pages
8h 44m
English
Content preview from Machine Learning: Hands-On for Developers and Technical Professionals
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Appendix BHadoop 1.x Quick Start
Chapter 10 covers Hadoop, and the example is based on Hadoop's MapReduce version 1 engine (MR1). The instructions in this appendix are for the MR1 engine. You might want to consider the Hadoop 2 version, which has performance improvements; installation is very similar to the following steps.
If you are running Mac OS X or a Unix operating system (for example, Linux) then the following instructions apply.
Downloading and Installing Hadoop
You can download Hadoop from one of the Apache mirror sites. I used http://mirrors.ukfast.co.uk/sites/ftp.apache.org/hadoop/common/.
Look for the hadoop-1.2.x release and download the .tar.gz, where x is the highest number. There are extra links to “stable1,” “stable2,” and “current,” that help guide you to the correct version.
tar xvzf hadoop-x.x.x-bin.tar.gzIn the configuration directory (called conf), edit the hadoop-env.sh file and edit the JAVA_HOME line:
export JAVA_HOME=/path/to/wherever/your-java/isAlso (this is a part that's very rarely mentioned), if your SSH configuration has a different port set up (the default port is 22, but the paranoid ...
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I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
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I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.