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  • Book Overview & Buying Learning Cascading
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Learning Cascading

Learning Cascading

By : Covert, Victoria Loewengart
5 (3)
Buy this Book
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Learning Cascading

Learning Cascading

5 (3)
By: Covert, Victoria Loewengart
Buy this Book

Overview of this book

This book is intended for software developers, system architects and analysts, big data project managers, and data scientists who wish to deploy big data solutions using the Cascading framework. You must have a basic understanding of the big data paradigm and should be familiar with Java development techniques.
Table of Contents (12 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. The Big Data Core Technology Stack
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1. The Big Data Core Technology Stack
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Reviewing Hadoop
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MapReduce execution framework
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The Cascading framework
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Summary
2
2. Cascading Basics in Detail
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2. Cascading Basics in Detail
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Understanding common Cascading themes
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Understanding how Cascading represents records
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Understanding how Cascading controls data flow
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Putting it all together
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Summary
3
3. Understanding Custom Operations
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3. Understanding Custom Operations
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Understanding operations
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Summary
4
4. Creating Custom Operations
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4. Creating Custom Operations
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Writing custom operations
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Identifying common use cases for custom operations
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Summary
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5. Code Reuse and Integration
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5. Code Reuse and Integration
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Creating and using subassemblies
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Using cascades
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Dynamically controlling flows
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Integrating external components
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Summary
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6. Testing a Cascading Application
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6. Testing a Cascading Application
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Debugging a Cascading application
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Testing strategies
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Summary
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7. Optimizing the Performance of a Cascading Application
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7. Optimizing the Performance of a Cascading Application
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Optimizing performance
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Summary
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8. Creating a Real-world Application in Cascading
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8. Creating a Real-world Application in Cascading
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Project description – Business Intelligence case study on monitoring the competition
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Project scope – understanding requirements
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Defining the project – the Cascading development methodology
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Building the workflow
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Next steps
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Summary
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9. Planning for Future Growth
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9. Planning for Future Growth
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Finding online resources
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Using other Cascading tools
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Custom taps
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Cascading serializers
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Java open source mock frameworks
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Summary
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A. Downloadable Software
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A. Downloadable Software
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Contents
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Installing and using
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Index
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Index

Dynamically controlling flows

One interesting aspect of Cascading is that flows can be dynamically controlled. Other similar languages and paradigms such as Pig and Hive allow a high degree of programmability, but their defined work runs from beginning to end, with no ability to control the execution flow through examination of data or conditions. With Cascading, program control can be used to alter the processing of a flow, to run it multiple times, to prevent it from running, or to programmatically control the very sequence and choice of flows that run. This is an important feature of Cascading and differentiates it from many other higher level frameworks. So the dynamic control of a flow is a "programmable" ability to run one or more flows iteratively, or alternately to control the sequence of execution. For instance:

  1. In a loop, run a flow.

  2. Check the status when the flow ends.

  3. Decide whether to run the flow again. Alternately, based on the outcome, determine which flow to run next.

  4. End when...

CONTINUE READING
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Tech Concepts
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Programming languages
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Learning Cascading
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