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.

Introduction to MongoDB

MongoDB is a relatively new breed of database that has no concept of tables, schemas, SQL, or rows. It doesn’t have transactions, ACID compliance, joins, foreign keys, or many of the other features that tend to cause headaches in the early hours of the morning. In short, MongoDB is a very different database than you’re probably used to, especially if you’ve used a relational database management system (RDBMS) in the past. In fact, you might even be shaking your head in wonder at the lack of so-called “standard” features.