Cascading - User Guide
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Cascading - User Guide

Concurrent, Inc

V 1.0

Copyright © 2007-2009 Concurrent, Inc

August, 2009

Table of Contents

1. Cascading

1.1. What is Cascading?
1.2. Who should use Cascading?
1.3. What is Apache Hadoop

2. Diving In

3. Data Processing

3.1. Introduction

3.2. Pipe Assemblies

Assembling Pipe Assemblies
Each and Every Pipes
GroupBy and CoGroup Pipes

3.3. Source and Sink Taps

Creating Flows from Pipe Assemblies
Configuring Flows
Skipping Flows

3.5. Creating Flows from a JobConf

3.6. Cascades

4. Executing Processes

4.1. Introduction
4.2. Building
4.3. Configuring
4.4. Executing

5. Using and Developing Operations

5.1. Introduction
5.2. Functions
5.3. Filter
5.4. Aggregator
5.5. Buffer
5.6. Operation and BaseOperation

6. Advanced Processing

6.1. SubAssemblies
6.2. Stream Assertions
6.3. Failure Traps
6.4. Event Handling
6.5. Template Taps
6.6. Scripting
6.7. Custom Taps and Schemes

7. Built-In Operations

7.1. Identity Function
7.2. Debug Function
7.3. Sample and Limit Functions
7.4. Insert Function
7.5. Text Functions
7.6. Regular Expression Operations
7.7. Java Expression Operations
7.8. XML Operations
7.9. Assertions
7.10. Logical Filter Operators

8. Best Practices

8.1. Unit Testing
8.2. SubAssemblies, not Factories
8.3. Give SubAssemblies Logical Responsibilities
8.4. Java Operators in Field Names
8.5. Debugging Planner Failures

9. How It Works

9.1. MapReduce Job Planner
9.2. The Cascade Topological Scheduler

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Copyright © 2007-2008 Concurrent, Inc. All Rights Reserved.