Document Database

Document Databases offer the following advantages:

High Performance #

MongoDB provides high-performance data persistence.

• The embedded data model reduces I/O activity in the database system.
• Fast queries through indexes, and keys can be added to embedded Documents and Arrays.

Rich Query Language #

MongoDB offers a rich query expression language.

High Availability #

MongoDB's replication, known as a replica set, provides the following features:

• automatic failover (if a specific node fails, another node takes over the task)
• data redundancy (a replica set is a group of MongoDB servers that provide the same data set, ensuring data reliability and high data availability.)

Horizontal Scalability #

MongoDB provides horizontal scaling and offers the following key features:

• Sharding: data distribution among machines
• MongoDB creates shard key-based zones starting from version 3.4. In a balanced cluster, MongoDB directs read and write operations to access the corresponding shard's zone directly.

Support for Multiple Storage Engines #

MongoDB offers various storage engines.

• WiredTiger Storage Engine
• MMAPv1 Storage Engine

In addition, various external engines can be added.