DynamoDB Applied Design Patterns

Table of Contents

DynamoDB Applied Design Patterns

Credits

About the Authors

About the Reviewers

www.PacktPub.com

Support files, eBooks, discount offers, and more

Why subscribe?

Free access for Packt account holders

Preface

What this book covers

What you need for this book

Who this book is for

Conventions

Reader feedback

Customer support

Errata

Piracy

Questions

1. Data Modeling with DynamoDB

Data model

Efficient use of primary keys

Basics of indexes

Default or primary indexes

Secondary indexes

DynamoDB data types

Summary

2. DynamoDB Interfaces

The management console

Managing the DynamoDB table

Managing DynamoDB table items

The Eclipse plugin

The command-line interface

Summary

3. Tools and Libraries of AWS DynamoDB

Creating your first SDK project

Java SDK operations

DynamoDB Local

Summary

4. Working with Secondary Indexes

Secondary indexes

Projection

Local secondary index

Global secondary index

Item sharding

Ideal item writing

Best practices with secondary indexes

Distributing the load by choosing the correct key

Making use of the sparse index

Using the global secondary index for quicker retrieval

Creating a read replica

Using indexes sparingly

Choosing projections carefully

Optimizing frequent queries to avoid fetches

Watching for expanding item collections

Summary

5. Query and Scan Operations in DynamoDB

Querying tables

Consistency

Exclusive start key

Scanning tables

Parallel scanning

Summary

6. Working with the DynamoDB API

Data format

HTTP requests

Request header

Request body

Response header

Error handling

Client-side error with status code 400 - retry not needed

AccessDeniedException

ConditionalCheckFailedException

IncompleteSignatureException

LimitExceededException

MissingAuthenticationTokenException

ResourceInUseException

ResourceNotFoundException

ValidationException

Client-side error with status code 400 - retry possible

ProvisionedThroughputExceededException

ItemCollectionSizeLimitExceededException

ThrottlingException

UnrecognizedClientException

Client-side error with status code 413

Server-side error with status code 500

InternalFailure and InternalServerError

ServiceUnavailableException

Error retry and exponential back off

Operations in DynamoDB

CreateTable

PutItem

UpdateItem

GetItem

Query

Scan

DeleteItem

DescribeTable

UpdateTable

DeleteTable

ListTables

BatchGetItem

BatchWriteItem

Summary

7. Distributed Locking with DynamoDB

Distributed locking

Solutions available to solve distributed writes

Java high-level API

Optimistic locking

Importance of distributed locking

Summary

8. DynamoDB with Redshift, Data Pipeline, and MapReduce

Loading data from DynamoDB into Redshift

Importing and exporting data between DynamoDB and S3

Creating Data Pipeline

Exporting, importing, querying, and joining tables using AWS MapReduce

Exporting data from DynamoDB to S3

Exporting the DynamoDB table to HDFS

Importing data to DynamoDB

Querying data in DynamoDB

Joining two DynamoDB tables

Summary

9. DynamoDB – Best Practices

DynamoDB use cases

Schema-less-ISH

Batch applications

Stating attributes using the :select option

Synchronization

Real-time problem statements and their solutions

Problem statement – 1

Solution

Problem statement – 2

Solution

Problem statement – 3

Solution

Problem Statement – 4

Solution

Problem statement – 5

Solution

AWS DynamoDB on mobile

Storing data in the table

Android

iOS

Updating a record

Android

iOS

Deleting a record

Android

iOS

Uniform workload

Time series tables

When to use and when not to use DynamoDB

Summary

A. Comparing DynamoDB

DynamoDB versus MongoDB

DynamoDB versus Cassandra

DynamoDB versus S3

DynamoDB versus Redis

Index

DynamoDB Applied Design Patterns

DynamoDB Applied Design Patterns

Copyright © 2014 Packt Publishing

All rights reserved. No part of this book may be reproduced, stored in a retrieval system, or transmitted in any form or by any means, without the prior written permission of the publisher, except in the case of brief quotations embedded in critical articles or reviews.

Every effort has been made in the preparation of this book to ensure the accuracy of the information presented. However, the information contained in this book is sold without warranty, either express or implied. Neither the authors, nor Packt Publishing, and its dealers and distributors will be held liable for any damages caused or alleged to be caused directly or indirectly by this book.

Packt Publishing has endeavored to provide trademark information about all of the companies and products mentioned in this book by the appropriate use of capitals. However, Packt Publishing cannot guarantee the accuracy of this information.

First published: September 2014

Production reference: 1160914

Published by Packt Publishing Ltd.

Livery Place

35 Livery Street

Birmingham B3 2PB, UK.

ISBN 978-1-78355-189-7

www.packtpub.com

Credits

Authors

Uchit Vyas

Prabhakaran Kuppusamy

Reviewers

Hrijul Parekh

Akshay Surve

Riddhi Thaker

Commissioning Editor

Pramila Balan

Acquisition Editor

Nikhil Karkal

Content Development Editor

Adrian Raposo

Technical Editor

Veronica Fernandes

Copy Editors

Roshni Banerjee

Sarang Chari

Project Coordinator

Sanchita Mandal

Proofreaders

Sam Birch

Paul Hindle

Indexer

Rekha Nair

Graphics

Disha Haria

Abhinash Sahu

Production Coordinator

Arvindkumar Gupta

Cover Work

Arvindkumar Gupta

About the Authors

Uchit Vyas is an open source specialist and a hands-on Lead DevOps of Clogeny Technologies. He is responsible for the delivery of solutions, services, and product development. He explores new open source technologies and defines architecture, roadmaps, and best practices for enterprises. He has consulted and provided training on various open source technologies, including Cloud computing (AWS Cloud, Rackspace, Azure, CloudStack, OpenStack, and Eucalyptus), Mule ESB, Chef, Puppet, Liferay Portal, Alfresco ECM, and JBoss to corporations around the world.

He has an engineering degree in Computer Science from Gujarat University. He was in the Education & Research Team as a senior associate at Infosys Limited, during which time he worked on SaaS, Private Clouds, Cloud Security, and Virtualization. He is now working on Cloud Automation.

He has also published a book on Mule ESB and is writing various books with Packt Publishing on open source technologies and AWS (Mastering AWS Development Guide, Packt Publishing).

He hosts a blog named Cloud Magic World (cloudbyuchit.blogspot.com), where he posts tips and phenomena about open source technologies, mostly relating to Cloud. He can also be found on twitter as @uchit_vyas.

I would like to thank my better half for helping me a lot in writing this book and providing me with continuous support all the time throughout the book-writing period. I would also like to thank my Infocian colleague, Prabhakaran Kuppusamy, for his great help.

Prabhakaran Kuppusamy is a Hadoop ecosystem specialist and Cloud enthusiast who is currently working as Senior Systems Engineer and developer, Cloud & Infrastructure Services unit, at Infosys Limited. He has been with Infosys for nearly 4 years now. He has a Bachelor of Engineering degree in Instrumentation and Control Engineering from Anna University. He joined Education & Research at Global Education Centre, Infosys, where he trained and evaluated thousands of freshers in Java, Big Data, and Cloud technologies. During his tenure in Education & Research, he provided training to students from Coventry University and to professionals from Costa Rica on Big Data and Cloud technologies, such as Hadoop, MapReduce, Hive, Elastic MapReduce, Google App Engine, DynamoDB, and CloudStack. It was during one of those training sessions that he met Uchit Vyas, and the idea of this book was born. After spending 2 years at the Global Education Centre, he moved to Cloud project management, where he started working on MarkLogic, Storm, and XQuery for a project on the banking domain. He can be found on Twitter at @prabhakar28dec.

Prabhakaran is currently working on the book AWS Development Essentials, Packt Publishing.

I would like to thank my mentors Sureesh Joseph, Bharathykannan Udhayasuriyan, Uchit Vyas, Bhupendra Bajpayi, and Ravindran Balachandran. Thanks for shepherding me personally and technically, by spending your time and goodwill in helping me spend valuable time on my maiden book and to bring the book out in good shape. Special thanks to Kshitiz Jain, my manager and friend, who has always been there to help me choose what suits me the best and helped me scale up in DynamoDB.

About the Reviewers

Hrijul Parekh has a B.Eng. degree in Information Technology with a research interest in Cloud and infrastructure automation. He is always enthusiastic to work on multiple platforms at a time and has the ability to integrate open source technologies. He is a Cloud Engineer at PMC Retail Pvt. Ltd.

With over 3 years of hands-on experience in open source technologies, he manages to guide the team and deliver projects and training sessions, meeting client expectations all along. He's responsible for designing and managing a Cloud environment/infrastructure and server architecture in his organization. He is also active in Shell scripting, autodeployment, supporting hundreds of Linux and Windows physical and virtual servers hosting databases, and applications with continuous delivery using Jenkins/Hudson with Chef scripting.

I would like to thank my family for supporting me to achieve my dreams.

Akshay Surve is in the pursuit of making meaning through his initiatives, be it for profit or for the good of society. At heart, he is a midnight code junkie and occasionally dabbles with prose.

He is also the cofounder and CTO at DeltaX, where he drives the technology and product roadmap. His expertise in Cloud computing and building web-scale distributed systems, coupled with a deep understanding of the ad-tech ecosystem over the last 8 years, has been one of the key drivers of the rapid pace of development of DeltaX's product line.

You can connect with him on Twitter. His Twitter handle is @AkshaySurve.

Riddhi Thaker has more than 4 years of software engineering experience in software design, analysis, development, testing, and implementation of web and client-server large-scale applications, as well as customized desktop applications based on Microsoft technologies and AWS infrastructure. She has extensive experience in design and development of applications using .NET and web technologies, such as XML, CSS, CSS3, Ajax, JavaScript, jQuery, UI designing, HTML, and HTML5 in n-tier architecture across platforms and even Cloud platforms.

She has a Bachelor's degree in Engineering in Information Technology from Gujarat University. She was in the Developer team as senior developer at BarodaWeb, during which time she worked on SaaS, private clouds, Azure, and virtualization. She is now working on Cloud deployment and various other Cloud platforms.

I would like to thank my better half for helping me a lot in reviewing this book and providing me with continuous support throughout the book reviewing period.

www.PacktPub.com

Support files, eBooks, discount offers, and more

You might want to visit www.PacktPub.com for support files and downloads related to your book.

Did you know that Packt offers eBook versions of every book published, with PDF and ePub files available? You can upgrade to the eBook version at www.PacktPub.com and as a print book customer, you are entitled to a discount on the eBook copy. Get in touch with us at for more details.

At www.PacktPub.com, you can also read a collection of free technical articles, sign up for a range of free newsletters and receive exclusive discounts and offers on Packt books and eBooks.

http://PacktLib.PacktPub.com

Do you need instant solutions to your IT questions? PacktLib is Packt's online digital book library. Here, you can access, read and search across Packt's entire library of books.

Why subscribe?

Fully searchable across every book published by Packt

Copy and paste, print and bookmark content

On demand and accessible via web browser

Free access for Packt account holders

If you have an account with Packt at www.PacktPub.com, you can use this to access PacktLib today and view nine entirely free books. Simply use your login credentials for immediate access.

Preface

This book, DynamoDB Applied Design Patterns, will be a single place to find solutions for all hiccups with Amazon DynamoDB. This book will explain how to create, design, and manage databases in DynamoDB using the AWS SDKs and APIs, as well as the AWS management console, a browser-based graphical user interface to interact with the service. It will include a significant number of examples that can be used by anyone, from a newbie to an expert. Using this book, users can perform advanced-level programming and gain the advantages of AWS DynamoDB NoSQL databases in their application at significantly lower costs.

What this book covers

Chapter 1, Data Modeling with DynamoDB, will teach users about data model concepts, including tables, items and attributes, primary key, and indexes and their design patterns.

Chapter 2, DynamoDB Interfaces, will help users gain knowledge of how to access DynamoDB in the management console. We will also take a look at the command-line interface and the Eclipse plugin.

Chapter 3, Tools and Libraries of AWS DynamoDB, will teach users what DynamoDB Local is, what the CLI commands are, and how we can use CLI from a developer/DBA perspective.

Chapter 4, Working with Secondary Indexes, will teach users what global and local secondary indexes are and what the importance of secondary indexes in DynamoDB is. Users will learn managed auto-sharding NoSQL databases that automatically reshard based on SLA.

Chapter 5, Query and Scan Operations in DynamoDB, will teach users about parallel scanning operations for DynamoDB. Users will learn how to use query and scan operations on DynamoDB tables and how to get results from query and scan operations.

Chapter 6, Working with the DynamoDB API, will take users through the Amazon DynamoDB API and its format. Users will learn how to call an API from applications to DynamoDB and how to retrieve data in an appropriate format that can be used with applications.

Chapter 7, Distributed Locking with DynamoDB, will provide readers with the information to support DynamoDB as an excellent choice for a distributed locking service, while briefly exploring the what, why, and how of locking.

Chapter 8, DynamoDB with Redshift, Data Pipeline, and MapReduce, will help readers work closely with DynamoDB from Redshift, S3, and MapReduce, and we will learn how to collaborate these AWS services with DynamoDB efficiently.

Chapter 9, DynamoDB – Best Practices, will help readers to deep dive into the best design use case architectures for DynamoDB. They will also learn real-time problem statements and their best solutions.

Appendix, Comparing DynamoDB, will teach users how Amazon DynamoDB is