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You're reading from  Hadoop 2.x Administration Cookbook

Product typeBook
Published inMay 2017
PublisherPackt
ISBN-139781787126732
Edition1st Edition
Tools
Hadoop
Concepts
System Administration
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Author (1)
Aman Singh
Aman Singh
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Aman Singh

Gurmukh Singh is a seasoned technology professional with 14+ years of industry experience in infrastructure design, distributed systems, performance optimization, and networks. He has worked in big data domain for the last 5 years and provides consultancy and training on various technologies. He has worked with companies such as HP, JP Morgan, and Yahoo. He has authored Monitoring Hadoop by Packt Publishing
Read more about Aman Singh

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Using HDFS Image Viewer

It is important to understand how metadata of the Namenode is stored and what changes to the filesystem have been rolled into fsimage file. The fsimage file and edits file cannot be viewed using a cat or vi editor, but needs specialized tools to do so.

Hadoop, by default, comes with utilities to view the fsimage file and edits file and, in this recipe, we will cover how to use these tools.

Getting ready

To step through the recipe in this section, we need a Hadoop cluster set up and running. The reader is encouraged to understand the Namenode metadata and its location.

How to do it...

  1. Connect to master1.cyrus.com master node in the cluster and switch to user hadoop.

  2. Confirm the location of the Namenode metadata by looking into hdfs-site.xml file. There will be something similar to the following, which points to the location of metadata. We will see in a later recipe how to check the value of any parameter, without opening the configuration files. To know the location of...

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Hadoop 2.x Administration Cookbook
Published in: May 2017Publisher: PacktISBN-13: 9781787126732
© 2017 Packt Publishing Limited All Rights Reserved

Author (1)

author image
Aman Singh

Gurmukh Singh is a seasoned technology professional with 14+ years of industry experience in infrastructure design, distributed systems, performance optimization, and networks. He has worked in big data domain for the last 5 years and provides consultancy and training on various technologies. He has worked with companies such as HP, JP Morgan, and Yahoo. He has authored Monitoring Hadoop by Packt Publishing
Read more about Aman Singh

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