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MongoDB is a document database system written in C++ once described as "CouchDB without the crazy". Its web site defines MongoDB as a scalable, high-performance, open source, schema-free, document-oriented database with the following primary features:

• Document-oriented storage (the simplicity and power of JSON-like data schemas)
• Dynamic queries
• Full index support, extending to inner-objects and embedded arrays
• Query profiling
• Fast, in-place updates
• Efficient storage of binary data large objects (e.g. photos and videos)
• Replication and failover support
• Auto-sharding for cloud-level scalability
• MapReduce for complex aggregation
• Commercial Support, Training, and Consulting

Programmatic access is available in a number of languages such as C, C++, C#, Erlang, Java, Python, Ruby, and more. MongoDB uses an AGPL/Apache license model, but it is friendlier to applications that want to use it.

Use Cases and Resources

• When Should I Use MongoDB?
• Mongo-based Applications
• MongoDB and e-Commerce

Tutorials and Articles

• MongoDB Quickstart for Windows
• MongoDB Querying
• MongoDB Indexes
• MongoDB Indexing FAQ
• MongoDB Connections
• MongoDB Data Modeling
• MongoDB Schema Design