A domain is a container that lets you store your structured data and run queries against it. The data is stored in the domain as items. A domain is similar to a worksheet tab in a spreadsheet, while items are similar in concept to the rows in the spreadsheet. You can run queries against a domain, but you cannot yet query across domains in the current version of SimpleDB. Each domain in your SimpleDB account is completely distinct from all your other domains, and therefore the items stored in one domain are completely separate from the items stored in other domains. This is why queries cannot be performed across domains. You can place all of your data in a single domain or partition it across multiple domains, depending on the nature of the data and the application. You can create a domain called cars and use it or you can partition the data into separate domains such as brands beginning with A-J in CARSAJ, beginning with K-T in CARSKT, and so on. SimpleDB gives you the freedom to...
Amazon SimpleDB Developer Guide
Amazon SimpleDB Developer Guide
Overview of this book
SimpleDB is a highly scalable, simple-to-use, and inexpensive database in the cloud from Amazon Web Services. But in order to use SimpleDB, you really have to change your mindset. This isn't a traditional relational database; in fact it's not relational at all. For developers who have experience working with relational databases, this may lead to misconceptions as to how SimpleDB works.This practical book aims to address your preconceptions on how SimpleDB will work for you. You will be quickly led through the differences between relational databases and SimpleDB, and the implications of using SimpleDB. Throughout this book, there is an emphasis on demonstrating key concepts with practical examples for Java, PHP, and Python developers.You will be introduced to this massively scalable schema-less key-value data store: what it is, how it works, and why it is such a game-changer. You will then explore the basic functionality offered by SimpleDB including querying, code samples, and a lot more. This book will help you deploy services outside the Amazon cloud and access them from any web host.You will see how SimpleDB gives you the freedom to focus on application development. As you work through this book you will be able to optimize the performance of your applications using parallel operations, caching with memcache, asynchronous operations, and more.
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Table of Contents (16 chapters)
Amazon SimpleDB Developer Guide
Credits
Foreword
About the Authors
About the Reviewers
Preface
Free Chapter
Getting to Know SimpleDB
Getting Started with SimpleDB
SimpleDB versus RDBMS
The SimpleDB Data Model
Data Types
Querying
Storing Data on S3
Tuning and Usage Costs
Caching
Customer Reviews