Book Image

YARN Essentials

Book Image

YARN Essentials

Overview of this book

Table of Contents (17 chapters)
YARN Essentials
About the Authors
About the Reviewers
Free Chapter
Need for YARN
YARN – Alternative Solutions

Administration of YARN

Now, we will take a look at some YARN basic administration configurations, basically from Hadoop 2.0. YARN was introduced and made changes in Hadoop configuration files. Hadoop and YARN have the following basic configuration files:

  • core-default.xml: This file contains properties related to the system.

  • hdfs-default.xml: This file contains HDFS-related configurations.

  • mapred-default.xml: This configuration file contains properties related to the YARN MapReduce framework.

  • yarn-default.xml: This file contains YARN-related properties.

You will find all these properties listed on the Apache website ( in the configuration section, with detailed information on each property and its default and possible values.

Administrative tools

YARN has several administrative tools by default; you can find them using the rmadmin command. Here is a more detailed explanation of the ResourceManager admin command:

$ yarn rmadmin -help

The rmadmin command...