MongoDB is a document-oriented database that's highly scalable and

delivers very high-performance, especially with massive data sets that

need to be spread across multiple servers. It blends the things you

expect with any database—like indexing, querying, and high

availability—with powerful new features like easy horizontal scaling

("auto-sharding"), map/reduce aggregation, and a flexible document

data model to support dynamic schemas.

MongoDB in Action is a comprehensive guide to MongoDB for

application developers. The book begins by explaining what makes

MongoDB unique and describing its ideal use cases. A series of

tutorials designed for MongoDB mastery then leads into detailed

examples for leveraging MongoDB in e-commerce, social networking,

analytics, and other common applications.

• Numerous examples, implemented in Ruby

• Comprehensive explanations

• Written by a MongoDB insider