DevOps Dictionary

MongoDB is an open-source NoSQL document database that stores data as flexible, JSON-like documents (BSON) instead of fixed rows and columns. It addresses the problem of rapidly changing application data models by letting teams evolve fields and nested structures without costly schema migrations, while still supporting indexing and a query language for efficient reads and updates. At a high level, MongoDB groups documents into collections, uses indexes to speed up lookups, and can scale by replicating data for high availability and sharding (splitting data across servers) for horizontal throughput. With MongoDB, teams can ship features faster and scale reads and writes more predictably; without it, a rigid relational schema can slow iteration and force complex joins and migrations as data shapes change. This gap exists because document storage keeps related data together, reducing cross-table coordination under load.