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Learning Hbase

You're reading from   Learning Hbase Learn the fundamentals of HBase administration and development with the help of real-time scenarios

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Product type Paperback
Published in Nov 2014
Publisher
ISBN-13 9781783985944
Length 326 pages
Edition 1st Edition
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Author (1):
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Shashwat Shriparv Shashwat Shriparv
Author Profile Icon Shashwat Shriparv
Shashwat Shriparv
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Toc

Table of Contents (12) Chapters Close

Preface 1. Understanding the HBase Ecosystem FREE CHAPTER 2. Let's Begin with HBase 3. Let's Start Building It 4. Optimizing the HBase/Hadoop Cluster 5. The Storage, Structure Layout, and Data Model of HBase 6. HBase Cluster Maintenance and Troubleshooting 7. Scripting in HBase 8. Coding HBase in Java 9. Advance Coding in Java for HBase 10. HBase Use Cases Index

Installing and configuring SSH


In this section, we will look at the steps to install and enable a passwordless SSH. It's always better that you have a dedicated Linux user for Hadoop and HBase processes. Let's create a user for Hadoop and HBase and name it hbasehadoop. We will use this user to start and stop all Hadoop/HBase daemon processes. Once the user is created, we can generate SSH for the same and set up a passwordless SSH on all machines. This user must exist on all machines in the cluster. Also, this user must be provided a root access if we need to install SSH using this user, else we can create a simple user just to start and stop the process, and we can install using the existing root user. The following figure will give you a clear picture:

To add a user, the current user must be a root user. So, switch to the root user using the following command before setting up a password:

useraddhbasehadoop

To set a password for the hbasehadoop user, use the following command:

passwdhbasehadoop...
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