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  • Book Overview & Buying Learning Hadoop 2
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Learning Hadoop 2

Learning Hadoop 2

By : GABRIELE MODENA
3.8 (4)
Buy this Book
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Learning Hadoop 2

Learning Hadoop 2

3.8 (4)
By: GABRIELE MODENA
Buy this Book

Overview of this book

If you are a system or application developer interested in learning how to solve practical problems using the Hadoop framework, then this book is ideal for you. You are expected to be familiar with the Unix/Linux command-line interface and have some experience with the Java programming language. Familiarity with Hadoop would be a plus.
Table of Contents (13 chapters)
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Preface
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Preface
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What this book covers
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What you need for this book
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Who this book is for
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Conventions
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Reader feedback
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Customer support
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1
1. Introduction
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1. Introduction
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A note on versioning
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The background of Hadoop
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Components of Hadoop
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Hadoop 2 – what's the big deal?
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Distributions of Apache Hadoop
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A dual approach
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AWS – infrastructure on demand from Amazon
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Getting started
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Running the examples
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Data processing with Hadoop
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Summary
2
2. Storage
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2. Storage
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The inner workings of HDFS
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Command-line access to the HDFS filesystem
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Protecting the filesystem metadata
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Apache ZooKeeper – a different type of filesystem
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Automatic NameNode failover
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HDFS snapshots
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Hadoop filesystems
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Managing and serializing data
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Storing data
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Summary
3
3. Processing – MapReduce and Beyond
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3. Processing – MapReduce and Beyond
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MapReduce
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Java API to MapReduce
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Writing MapReduce programs
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Walking through a run of a MapReduce job
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YARN
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YARN in the real world – Computation beyond MapReduce
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Summary
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4. Real-time Computation with Samza
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4. Real-time Computation with Samza
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Stream processing with Samza
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Summary
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5. Iterative Computation with Spark
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5. Iterative Computation with Spark
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Apache Spark
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The Spark ecosystem
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Processing data with Apache Spark
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Comparing Samza and Spark Streaming
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Summary
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6. Data Analysis with Apache Pig
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6. Data Analysis with Apache Pig
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An overview of Pig
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Getting started
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Running Pig
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Fundamentals of Apache Pig
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Programming Pig
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Extending Pig (UDFs)
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Analyzing the Twitter stream
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Summary
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7. Hadoop and SQL
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7. Hadoop and SQL
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Why SQL on Hadoop
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Prerequisites
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Hive architecture
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Hive and Amazon Web Services
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Extending HiveQL
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Programmatic interfaces
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Stinger initiative
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Impala
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Summary
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8. Data Lifecycle Management
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8. Data Lifecycle Management
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What data lifecycle management is
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Building a tweet analysis capability
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Challenges of external data
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Collecting additional data
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Pulling it all together
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Summary
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9. Making Development Easier
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9. Making Development Easier
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Choosing a framework
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Hadoop streaming
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Kite Data
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Apache Crunch
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Summary
10
10. Running a Hadoop Cluster
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10. Running a Hadoop Cluster
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I'm a developer – I don't care about operations!
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Cloudera Manager
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Ambari – the open source alternative
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Operations in the Hadoop 2 world
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Sharing resources
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Building a physical cluster
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Building a cluster on EMR
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Cluster tuning
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Security
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Monitoring
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Troubleshooting
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Summary
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11. Where to Go Next
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11. Where to Go Next
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Alternative distributions
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Other computational frameworks
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Other interesting projects
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Other programming abstractions
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AWS resources
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Sources of information
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Summary
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Index
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Index

Pulling it all together

Let's review what we've discussed until now and how we can use Oozie to build a sophisticated series of workflows that implement an approach to data life cycle management by putting together all the discussed techniques.

First, it's important to define clear responsibilities and implement parts of the system using good design and separation of concern principles. By applying this, we end up with several different workflows:

  • A subworkflow to ensure the environment (mainly HDFS and Hive metadata) is correctly configured

  • A subworkflow to perform data validation

  • The main workflow that triggers both the preceding subworkflows and then pulls new data through a multistep ingest pipeline

  • A coordinator that executes the preceding workflows every 10 minutes

  • A second coordinator that ingests reference data that will be useful to the application pipeline

We also define all our tables with Avro schemas and use them wherever possible to help manage schema evolution and changing data formats...

CONTINUE READING
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Tech Concepts
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Programming languages
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