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Learning YARN

You're reading from  Learning YARN

Product type Book
Published in Aug 2015
Publisher
ISBN-13 9781784393960
Pages 278 pages
Edition 1st Edition
Languages
Concepts

Table of Contents (20) Chapters

Learning YARN
Credits
About the Authors
Acknowledgments
About the Reviewers
www.PacktPub.com
Preface
1. Starting with YARN Basics 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

The migration steps from MRv1 to MRv2

The migration steps from MRv1 to MRv2 can be categorized as:

  • The configuration changes to use YARN as the MapReduce execution framework

  • The binary / source compatibility while working with MapReduce APIs

Configuration changes

In this section, we'll discuss the configuration changes required during migration from MRv1 to MRv2. The information provided in this section is limited to the minimum configuration changes required during the migration. Detailed information regarding the deprecated and new properties is provided in a Cloudera blog at https://www.cloudera.com/content/cloudera/en/documentation/core/v5-2-x/topics/cdh_ig_mapreduce_to_yarn_migrate.html.

The upcoming sections describe the changes while migrating from MRv1 to MRv2.

  • The MapReduce framework

    If you recall the configuration of a Hadoop cluster in MRv1, the mapred-site.xml file contains the host information related to the JobTracker service. In MRv2, the following property in the mapred-site.xml...

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