MongoDB

MongoDB (from "humongous") is a scalable, high-performance, open source, dynamic-schema, document-oriented database. Written in C++, MongoDB features:

- Document-oriented storage (the power and flexibility of JSON-like data schemas)
- Dynamic queries
- Full index support, including secondary indexes, inner-objects, embedded arrays, geospatial
- Query profiling
- Fast, in-place updates
- Efficient storage of binary data large objects (e.g. photos and videos)
- Replication and fail-over support
- Auto-sharding for cloud-level scalability
- MapReduce for complex aggregation