Book Image

Hadoop Operations and Cluster Management Cookbook

By : Shumin Guo
Book Image

Hadoop Operations and Cluster Management Cookbook

By: Shumin Guo

Overview of this book

<p>We are facing an avalanche of data. The unstructured data we gather can contain many insights that could hold the key to business success or failure. Harnessing the ability to analyze and process this data with Hadoop is one of the most highly sought after skills in today's job market. Hadoop, by combining the computing and storage powers of a large number of commodity machines, solves this problem in an elegant way!</p> <p>Hadoop Operations and Cluster Management Cookbook is a practical and hands-on guide for designing and managing a Hadoop cluster. It will help you understand how Hadoop works and guide you through cluster management tasks.</p> <p>This book explains real-world, big data problems and the features of Hadoop that enables it to handle such problems. It breaks down the mystery of a Hadoop cluster and will guide you through a number of clear, practical recipes that will help you to manage a Hadoop cluster.</p> <p>We will start by installing and configuring a Hadoop cluster, while explaining hardware selection and networking considerations. We will also cover the topic of securing a Hadoop cluster with Kerberos, configuring cluster high availability and monitoring a cluster. And if you want to know how to build a Hadoop cluster on the Amazon EC2 cloud, then this is a book for you.</p>
Table of Contents (15 chapters)
Hadoop Operations and Cluster Management Cookbook
Credits
About the Author
About the Reviewers
www.PacktPub.com
Preface
Index

Installing Java and other tools


Hadoop was built using Java, so Java is required before installing Hadoop.

Getting ready

Under Linux, OpenJDK provides an open source Java implementation. But if we use OpenJDK for Hadoop, it will cause low level and hard to tackle problems. So, OpenJDK is not recommended for the Hadoop installation. Instead, Java from Oracle is recommended.

  1. Check if OpenJDK has been installed in the system with the command:

    rpm –qa | grep openjdk
    

    Tip

    If no output is given, it means OpenJDK has not been installed.

  2. If Java has been installed in the system, we can check its version with:

    java -version
    
  3. If OpenJDK is used, we should be able to get output similar to the following:

    java version "1.7.0_09-icedtea"
    OpenJDK Runtime Environment (fedora-2.3.4.fc17-x86_64)
    OpenJDK 64-Bit Server VM (build 23.2-b09, mixed mode)
    
  4. After confirming whether we are using OpenJDK, we need to remove the package and reinstall the version downloaded from Oracle's official website.

  5. To remove OpenJDK, we...