About MongoDB
MongoDB stores data as flexible JSON-like documents. It scales horizontally and is popular for applications with evolving data models.
Key Features
- Document model
- Horizontal scaling
- Atlas managed service
- Aggregation pipeline
- Change streams
- Multi-document ACID
MongoDB is the most popular NoSQL database, storing data as flexible BSON documents rather than rigid table rows. This document model maps naturally to objects in application code, reducing the impedance mismatch between database and application layers. MongoDB excels in scenarios where data models evolve frequently — adding a field to a document doesn't require a schema migration. Atlas, MongoDB's managed cloud service, handles replication, sharding, backups, and monitoring. While MongoDB faced criticism in its early years for data durability concerns, modern versions with the WiredTiger storage engine and multi-document ACID transactions have addressed most of these issues.