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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

Understanding HBase components in detail


To understand the components of HBase, let's start from the bottom, from HFile to RegionServers, and then progress towards the master. There can be one to n RegionServers, one to n DataNodes, and one to n ZooKeeper nodes. Refer to the following figure:

HFile

HFile is designed after Google SSTable, which is a reinterpretation of Google's implementation based on their Bigtable paper. It was implemented after HBase v0.20.0; earlier, an alternate file format, that is, MapFile was being temporarily used. An HFile internally consists of HFile blocks that are its building blocks.

Note

Go through the links https://hbase.apache.org/book/apes03.html and https://issues.apache.org/jira/browse/HBASE-3857, and also go through the PDF files present on the previous link for an actual file representation of HFile on the disk.

Region

Regions are the basic blocks of RegionServers that provide distribution, availability, and storage for columns and column families on an HBase...

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