Appendix A. Installing Apache Hadoop
It’s easy to install Hadoop on a single machine to try it out. (For installation on a cluster, please refer to Chapter 9.) The quickest way is to download and run a binary release from an Apache Software Foundation Mirror.
In this appendix, we cover how to install Hadoop Core, HDFS, and MapReduce. Instructions for installing Pig, HBase, and ZooKeeper are included in the relevant chapter (Chapters 11, 12, and 13).
Prerequisites
Hadoop is written in Java, so you will need to have Java installed on your machine, version 6 or later. Sun’s JDK is the one most widely used with Hadoop, although others have been reported to work.
Hadoop runs on Unix and on Windows. Linux is the only supported production platform, but other flavors of Unix (including Mac OS X) can be used to run Hadoop for development. Windows is only supported as a development platform, and additionally requires Cygwin to run. During the Cygwin installation process, you should include the openssh package if you plan to run Hadoop in pseudo-distributed mode (see following explanation).
Installation
Start by deciding which user you’d like to run Hadoop as. For trying out Hadoop or developing Hadoop programs, it is simplest to run Hadoop on a single machine using your own user account.
Download a stable release, which is packaged as a gzipped tar file, from the Apache Hadoop releases page (http://hadoop.apache.org/core/releases.html) and unpack it somewhere on your filesystem:
%tar xzf hadoop- ...
Get Hadoop: The Definitive Guide now with the O’Reilly learning platform.
O’Reilly members experience books, live events, courses curated by job role, and more from O’Reilly and nearly 200 top publishers.
