MongoDB: The Definitive Guide, Second Edition (repost)

Manage the huMONGOus amount of data collected through your web application with MongoDB. This authoritative introduction—written by a core contributor to the project—shows you the many advantages of using document-oriented databases, and demonstrates how this reliable, high-performance system allows for almost infinite horizontal scalability.

This updated second edition provides guidance for database developers, advanced configuration for system administrators, and an overview of the concepts and use cases for other people on your project. Ideal for NoSQL newcomers and experienced MongoDB users alike, this guide provides numerous real-world schema design examples.
Get started with MongoDB core concepts and vocabulary
Perform basic write operations at different levels of safety and speed
Create complex queries, with options for limiting, skipping, and sorting results
Design an application that works well with MongoDB
Aggregate data, including counting, finding distinct values, grouping documents, and using MapReduce
Gather and interpret statistics about your collections and databases
Set up replica sets and automatic failover in MongoDB
Use sharding to scale horizontally, and learn how it impacts applications
Delve into monitoring, security and authentication, backup/restore, and other administrative tasks