MongoDB vs Redis: Key Differences Explained

MongoDB is a document-oriented database designed for storing and querying complex structured data, with rich querying language and indexing capabilities. On the other hand, Redis is an in-memory database suitable for high-speed read and write operations and real-time data storage, commonly used for caching and message queues.

The main differences include:

1. Data model: MongoDB is a document-oriented database where data is stored in collections in the form of documents, and it supports a rich query language and indexing capabilities; whereas Redis is a key-value based in-memory database where data is stored in the form of key-value pairs in memory.
2. Storage method: MongoDB stores data on disk, supporting large capacity data storage; while Redis stores data in memory, suitable for high-speed read/write operations and real-time data storage.
3. Data persistence: MongoDB offers various ways to persist data to disk to ensure its reliability. Redis also supports data persistence to disk or in-memory only, allowing users to choose different persistence strategies.
4. MongoDB is suitable for storing and querying complex structured data such as document data and log data, while Redis is ideal for fast read and write operations and real-time data storage, such as caching and message queue scenarios.