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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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Fetching parameters which are in-effect

In this recipe, we look at how we can fetch the configured parameters in the Hadoop cluster, without going through the files.

The parameters are either default values, defined by files such as hdfs-default.xml, core-default.xml, yarn-default.xml, and so on, or defined explicitly in the configuration files such as hdfs-site.xml, core-site.xml, mapred-site.xml, and a few others. The default files are part of the packaged jars with the distribution, and any changes we make overrides them.

Getting ready

To step through the recipe, the user needs at least one node in the cluster and needs to make sure that the Hadoop environment variables are in place. It is not necessary to start any of the daemons in the cluster.

How to do it...

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

  2. To find the value of any parameter, use the following command:

    $ hdfs getconf –confkey dfs.blocksize
$ hdfs getconf –confkey dfs.replication
$ hdfs...
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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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