Book Image

Hadoop Beginner's Guide

Book Image

Hadoop Beginner's Guide

Overview of this book

Data is arriving faster than you can process it and the overall volumes keep growing at a rate that keeps you awake at night. Hadoop can help you tame the data beast. Effective use of Hadoop however requires a mixture of programming, design, and system administration skills."Hadoop Beginner's Guide" removes the mystery from Hadoop, presenting Hadoop and related technologies with a focus on building working systems and getting the job done, using cloud services to do so when it makes sense. From basic concepts and initial setup through developing applications and keeping the system running as the data grows, the book gives the understanding needed to effectively use Hadoop to solve real world problems.Starting with the basics of installing and configuring Hadoop, the book explains how to develop applications, maintain the system, and how to use additional products to integrate with other systems.While learning different ways to develop applications to run on Hadoop the book also covers tools such as Hive, Sqoop, and Flume that show how Hadoop can be integrated with relational databases and log collection.In addition to examples on Hadoop clusters on Ubuntu uses of cloud services such as Amazon, EC2 and Elastic MapReduce are covered.
Table of Contents (19 chapters)
Hadoop Beginner's Guide
Credits
About the Author
About the Reviewers
www.PacktPub.com
Preface
Index

Upcoming Hadoop changes


Before discussing alternative Hadoop distributions, let's look at some changes to Hadoop itself in the near future. We've already discussed the HDFS changes coming in Hadoop 2.0, particularly the high availability of NameNode enabled by the new BackupNameNode and CheckpointNameNode services. This is a significant capability for Hadoop as it will make HDFS much more robust, greatly enhancing its enterprise credentials and streamlining cluster operations. The impact of NameNode HA is hard to exaggerate; it will almost certainly become one of those capabilities that no one will be able to remember how we lived without in a few years' time.

MapReduce is not standing still while all this is going on, and in fact, the changes being introduced may not have as much immediate impact but are actually much more fundamental.

These changes were initially developed under the name MapReduce 2.0 or MRV2 . However, the name now being used is YARN (Yet Another Resource Negotiator)...