Features of MongoDB

High Performance

MongoDB provides high performance data persistence. In particular,

• Support for embedded data models reduces I/O activity on database system.
• Indexes support faster queries and can include keys from embedded documents and arrays.

High Availability

To provide high availability, MongoDB’s replication facility, called replica sets, provide:

• automatic failover.
• data redundancy.

A replica set is a group of MongoDB servers that maintain the same data set, providing redundancy and increasing data availability.

Automatic Scaling

MongoDB provides horizontal scalability as part of its core functionality.

• Automatic sharding distributes data across a cluster of machines.
• Replica sets can provide eventually-consistent reads for low-latency high throughput deployments.