Search icon CANCEL
Subscription
0
Cart icon
Your Cart (0 item)
Close icon
You have no products in your basket yet
Arrow left icon
Explore Products
Best Sellers
New Releases
Books
Videos
Audiobooks
Learning Hub
Free Learning
Arrow right icon
Arrow up icon
GO TO TOP
Learning Hbase

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

Arrow left icon
Product type Paperback
Published in Nov 2014
Publisher
ISBN-13 9781783985944
Length 326 pages
Edition 1st Edition
Languages
Tools
Arrow right icon
Author (1):
Arrow left icon
Shashwat Shriparv Shashwat Shriparv
Author Profile Icon Shashwat Shriparv
Shashwat Shriparv
Arrow right icon
View More author details
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

Services of HBase


The HBase data model terminology is listed as follows:

  • Table

  • Row

  • Column family

  • Column

  • Cell

Let's have a look at each of them in detail.

Row key

This is a unique key for each record in an HBase table. It is represented as a byte array internally. No matter what data (string, long, date, or serialized) we choose as the row key, internally, on the disk, or in memory, it will be converted to byte arrays, and then stored. For example, Emp_ID can be the row key for an employee table.

Column family

This entity of an HBase table groups different columns of the table. Suppose we have columns such as name, dob, salary, city, phone, pin, and landmark in an employee table. We can group these columns as Basic_Detail(name, dob, salary) and Address(city, phone, pin, landmark) as two column families. The benefit is that you can retrieve the columns faster as column families are stored separately in HBase on the disk.

Column

Each field in a row is called a column family. We can have columns such as...

lock icon The rest of the chapter is locked
Register for a free Packt account to unlock a world of extra content!
A free Packt account unlocks extra newsletters, articles, discounted offers, and much more. Start advancing your knowledge today.
Unlock this book and the full library FREE for 7 days
Get unlimited access to 7000+ expert-authored eBooks and videos courses covering every tech area you can think of
Renews at $19.99/month. Cancel anytime
Banner background image