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Learning YARN

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

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Product type Paperback
Published in Aug 2015
Publisher
ISBN-13 9781784393960
Length 278 pages
Edition 1st Edition
Tools
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Toc

Table of Contents (14) Chapters Close

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

NodeManager REST APIs


YARN NodeManager APIs allow the user or administrator to obtain the node resource metrics, health status of the node, list of applications and containers associated with that node, and so on. The default port for NodeManager's web application is 8042. An administrator can configure the web application address using the yarn.nodemanager.webapp.address property in the yarn-site.xml file.

NodeManager REST APIs can be grouped as:

  • Node summary

  • Applications

  • Containers

The node summary

This API provides metadata about the node, which includes the version of the NodeManager service, host name, node status, resource utilization, and more:

  • Node metadata: The summary for the node:

    • URI: http://<NM Http Address:Port>/ws/v1/node/info

    • Example: http://node1:8042/ws/v1/node/info

Applications

Similar to the ResourceManager API, the application APIs for NodeManager provide information related to a collection of application objects or a specific application that is associated with the...

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