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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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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

Setting up the environment for development


Start your IDE. From here, we will consider Eclipse as a development IDE. So, start Eclipse and create a new Java project. Once the project is created, add JAR files to the project needed for development. We will go through this process step by step.

Building a Java client to code in HBase

HBase provides HTable as a client that is responsible for finding RegionServers where a particular data is present. It is done by reading the HBase metadata, hbase:meta (called .META. in the older versions of HBase), which includes a key-value pair.

Let's discuss the format in short here:

  • Key: It contains region key information about the table, region, and region ID in the following format:

    [table], [region start key], [region id]
  • Value: This contains info:regioninfo (org.apache.hadoop.hbase.HRegionInfo with fields such as table name, start key, regionID, replicaID, encoded name, end key, split, and offline), info:server (the server port for RegionServer), and info...

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