Availability: Free and Open Source

It is a NoSQL database, which is highly scalable, flexible and distributed.

It is an open source database management system (DBMS) that uses a document-oriented data model

It is used by some of the largest companies in the world, including Facebook, Google, Nokia, MTV Networks, Cisco, Forbes, and many more.

Here the documents are stored as JSON document

Ad hoc queries

Indexing

Replication

Load balancing

Aggregation

File storage