Overview

MongoDB is a high-performance, open source, schema-free document-oriented data store that is easy to deploy, manage and use.

Main Features

MongoDB is network accessible, written in C++ and offers the following features :

• Collection oriented storage - easy storage of object- style data
• Full index support, including on inner objects
• Query profiling
• Replication and fail-over support
• Efficient storage of binary data including large objects (e.g. videos)
• Auto-sharding for cloud-level scalability (Q209)

High performance, scalability, and reasonable depth of functionality are the goals for the project.

What’s up with the name ?

The name Mongo comes from “Humongous”.

Why Mongo ?

Here are the some of the features that may lead you to use MongoDB:

• Document-oriented

• Documents (objects) map nicely to programming language data types
• Embedded documents and arrays reduce need for joins
• Dynamically-typed (schemaless) for easy schema evolution
• No joins and no multi-document transactions for high performance and easy scalability

• High performance

• No joins and embedding makes reads and writes fast
• Indexes including indexing of keys from embedded documents and arrays
• Optional streaming writes (no acknowledgements)

• High availability

• Replicated servers with automatic master failover

• Easy scalability

• Automatic sharding (auto-partitioning of data across servers)

• Reads and writes are distributed over shards
• No joins or multi-document transactions make distributed queries easy and fast

• Eventually-consistent reads can be distributed over replicated servers

• Rich query language