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You're reading from Mastering Hadoop 3 Big data processing at scale to unlock unique business insights

Product type Paperback

Published in Feb 2019

Publisher Packt

ISBN-13 9781788620444

Length 544 pages

Edition 1st Edition

Languages

Java

Tools

Hadoop

Concepts

Big Data

Authors (3):

Timothy Wong

Manish Kumar

Chanchal Singh

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Table of Contents (21) Chapters

Preface

1. Section 1: Introduction to Hadoop 3 FREE CHAPTER

2. Journey to Hadoop 3

3. Deep Dive into the Hadoop Distributed File System

4. YARN Resource Management in Hadoop

5. Internals of MapReduce

6. Section 2: Hadoop Ecosystem

7. SQL on Hadoop

8. Real-Time Processing Engines

9. Widely Used Hadoop Ecosystem Components

10. Section 3: Hadoop in the Real World

11. Designing Applications in Hadoop

12. Real-Time Stream Processing in Hadoop

13. Machine Learning in Hadoop

14. Hadoop in the Cloud

15. Hadoop Cluster Profiling

16. Section 4: Securing Hadoop

17. Who Can Do What in Hadoop

18. Network and Data Security

19. Monitoring Hadoop

20. Other Books You May Enjoy

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HDFS high availability in Hadoop 3.x

With Hadoop 2.0, active and standby NameNodes were introduced. At any point, out of two NameNodes, one will always be in active state and other will be in standby state. The active NameNode is the one that's responsible for any client requests in the cluster. Standby NameNodes are slave nodes whose responsibility is to keep its state in sync with the active NameNode so that it can provide fast failover in the event of failover. However, what if one of the NameNodes fails? In that case, the NameNode would become non-HA. This means that NameNodes can only tolerate up to one failure. This behavior is the opposite of the core fault -tolerant behavior of Hadoop, which certainly can accommodate more than one failure of DataNodes in a cluster. Keeping that in mind, provisions of more than one standby NameNode was introduced in Hadoop 3. ...

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Authors (3)

Singh

Contacted on 12/01/18 by Davis Anto

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Wong

Dr. Timothy Wong is a 30 years IT veteran. He holds a PhD in networking from University of Manchester Institute of Science and Technology, UK. He has deep experience in wireless and wireline networking, digital a/v, software development, sales and consulting. He frequently works with telcos, banks, governments and enterprises. He is also a professor on Big Data, Wireless and IoT at Humber College, Toronto, Canada. As an entrepreneur, he co-founded a number of companies in the past 20 years. He infuses business and technical knowledge to pursue successes.

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Kumar

Ashish Kumar is a seasoned data science professional, a publisher author and a thought leader in the field of data science and machine learning. An IIT Madras graduate and a Young India Fellow, he has around 7 years of experience in implementing and deploying data science and machine learning solutions for challenging industry problems in both hands-on and leadership roles. Natural Language Procession, IoT Analytics, R Shiny product development, Ensemble ML methods etc. are his core areas of expertise. He is fluent in Python and R and teaches a popular ML course at Simplilearn. When not crunching data, Ashish sneaks off to the next hip beach around and enjoys the company of his Kindle. He also trains and mentors data science aspirants and fledgling start-ups.

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