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Cloudera Administration Handbook

You're reading from Cloudera Administration Handbook A complete, hands-on guide to building and maintaining large Apache Hadoop clusters using Cloudera Manager and CDH5

Product type Paperback

Published in Jul 2014

Publisher Packt

ISBN-13 9781783558964

Length 254 pages

Edition 1st Edition

Tools

CentOS

Concepts

Cloud Computing

Author (1):

Rohit Menon

View More author details

Table of Contents (11) Chapters

Preface

1. Getting Started with Apache Hadoop

2. HDFS and MapReduce FREE CHAPTER

3. Cloudera's Distribution Including Apache Hadoop

4. Exploring HDFS Federation and Its High Availability

5. Using Cloudera Manager

6. Implementing Security Using Kerberos

7. Managing an Apache Hadoop Cluster

8. Cluster Monitoring Using Events and Alerts

9. Configuring Backups

Index

Understanding the namenode UI

Hadoop provides web interfaces for each of its services. The namenode UI or the namenode web interface is used to monitor the status of the namenode and can be accessed using the following URL:

http://<namenode-server>:50070/

The namenode UI has the following sections:

Overview: The general information section provides basic information of the namenode with options to browse the filesystem and the namenode logs.
The following is the screenshot of the Overview section of the namenode UI:
The Cluster ID parameter displays the identification number of the cluster. This number is same across all the nodes within the cluster.
A block pool is a set of blocks that belong to a single namespace. The Block Pool Id parameter is used to segregate the block pools in case there are multiple namespaces configured when using HDFS federation. In HDFS federation, multiple namenodes are configured to scale the name service horizontally. These namenodes are configured to share...

You have been reading a chapter from

Cloudera Administration Handbook

Published in: Jul 2014

Publisher: Packt

ISBN-13: 9781783558964

© 2014 Packt Publishing Limited All Rights Reserved

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Authors (1)

Menon

Menon

Rohit Menon is a senior system analyst living in Denver, Colorado. He has over 7 years of experience in the field of Information Technology, which started with the role of a real-time applications developer back in 2006. He now works for a product-based company specializing in software for large telecom operators. He graduated with a master's degree in Computer Applications from University of Pune, where he built an autonomous maze-solving robot as his final year project. He later joined a software consulting company in India where he worked on C#, SQL Server, C++, and RTOS to provide software solutions to reputable organizations in USA and Japan. After this, he started working for a product-based company where most of his time was dedicated to programming the finer details of products using C++, Oracle, Linux, and Java. He is a person who always likes to learn new technologies and this got him interested in web application development. He picked up Ruby, Ruby on Rails, HTML, JavaScript, CSS, and built www.flicksery.com, a Netflix search engine that makes searching for titles on Netflix much easier. On the Hadoop front, he is a Cloudera Certified Apache Hadoop Developer. He blogs at www.rohitmenon.com, mainly on topics related to Apache Hadoop and its components. To share his learning, he has also started www.hadoopscreencasts.com, a website that teaches Apache Hadoop using simple, short, and easy-to-follow screencasts. He is well versed with wide variety of tools and techniques such as MapReduce, Hive, Pig, Sqoop, Oozie, and Talend Open Studio.

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