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Learning YARN

You're reading from Learning YARN Moving beyond MapReduce - learn resource management and big data processing using YARN

Product type Paperback

Published in Aug 2015

Publisher

ISBN-13 9781784393960

Length 278 pages

Edition 1st Edition

Tools

Hadoop

Concepts

Data Processing

Table of Contents (14) Chapters

Preface

1. Starting with YARN Basics FREE CHAPTER

2. Setting up a Hadoop-YARN Cluster

3. Administering a Hadoop-YARN Cluster

4. Executing Applications Using YARN

5. Understanding YARN Life Cycle Management

6. Migrating from MRv1 to MRv2

7. Writing Your Own YARN Applications

8. Dive Deep into YARN Components

9. Exploring YARN REST Services

10. Scheduling YARN Applications

11. Enabling Security in YARN

12. Real-time Data Analytics Using YARN

Index

An overview of web user interfaces

Similar to web interfaces available in the Hadoop 1.x version, the Hadoop 2.x version has web user interfaces for Hadoop services. Instead of the JobTracker service web UI, the web UI for ResourceManager is used to monitor applications and resources. A detailed explanation regarding the configurations related to the web UI's is given in the next chapter.

The following screenshot refers to the web-interface of Hadoop HDFS. Through the HDFS interface, you can:

Explore the HDFS metrics
View the list of DataNodes connected to the NameNode
Browse the file system, and so on

An overview of web user interfaces

The following screenshot refers to the web-interface of YARN ResourceManager. It shows:

A summarized view of the cluster resource capabilities
A list of applications related to the cluster
A list of NodeManager nodes connected
The scheduler details, and so on

An overview of web user interfaces

You can refer to the .pid files for the Hadoop daemons that are created in the /tmp folder of your node. These files contain the current...

The rest of the chapter is locked

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