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Hadoop Beginner's Guide

You're reading from   Hadoop Beginner's Guide Get your mountain of data under control with Hadoop. This guide requires no prior knowledge of the software or cloud services ‚Äì just a willingness to learn the basics from this practical step-by-step tutorial.

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Product type Paperback
Published in Feb 2013
Publisher Packt
ISBN-13 9781849517300
Length 398 pages
Edition 1st Edition
Tools
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Toc

Table of Contents (19) Chapters Close

Hadoop Beginner's Guide
Credits
About the Author
About the Reviewers
www.PacktPub.com
Preface
1. What It's All About 2. Getting Hadoop Up and Running FREE CHAPTER 3. Understanding MapReduce 4. Developing MapReduce Programs 5. Advanced MapReduce Techniques 6. When Things Break 7. Keeping Things Running 8. A Relational View on Data with Hive 9. Working with Relational Databases 10. Data Collection with Flume 11. Where to Go Next Pop Quiz Answers Index

Time for action – writing network traffic onto HDFS


This discussion of Flume in a book about Hadoop hasn't actually used Hadoop at all so far. Let's remedy that by writing data onto HDFS via Flume.

  1. Create the following file as agent4.conf within the Flume working directory:

    agent4.sources = netsource
    agent4.sinks = hdfssink
    agent4.channels = memorychannel
    
    agent4.sources.netsource.type = netcat
    agent4.sources.netsource.bind = localhost
    agent4.sources.netsource.port = 3000
    
    agent4.sinks.hdfssink.type = hdfs
    agent4.sinks.hdfssink.hdfs.path = /flume
    agent4.sinks.hdfssink.hdfs.filePrefix = log
    agent4.sinks.hdfssink.hdfs.rollInterval = 0
    agent4.sinks.hdfssink.hdfs.rollCount = 3
    agent4.sinks.hdfssink.hdfs.fileType = DataStream
    
    agent4.channels.memorychannel.type = memory
    agent4.channels.memorychannel.capacity = 1000
    agent4.channels.memorychannel.transactionCapacity = 100
    
    agent4.sources.netsource.channels = memorychannel
    agent4.sinks.hdfssink.channel = memorychannel
  2. Start the agent:

    $ flume-ng agent...
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