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Redis

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description Redis Overview

Redis is an open-source, in-memory data structure store used as a database, cache, and message broker. Because it operates entirely in RAM, it provides incredibly low latency for read/write operations. Redis supports various data structures like strings, hashes, lists, sets, and sorted sets, making it versatile for session management, real-time leaderboards, and pub/sub messaging.

help Redis FAQ

What type of database is Redis?

Redis is an open-source, in-memory data structure store that can be used as a database, cache, streaming engine, and message broker. Because it stores data primarily in RAM, it offers incredibly low latency and high throughput for read/write operations.

What data structures does Redis support?

Unlike simple key-value stores, Redis supports complex data structures like strings, hashes, lists, sets, sorted sets, and streams. This versatility allows developers to use Redis for a wide variety of applications, such as real-time leaderboards and session caching.

Who developed Redis and when was it released?

Redis was originally developed by an Italian developer named Salvatore Sanfilippo, also known online as 'antirez', in 2009. The project quickly grew in popularity due to its performance and simplicity, eventually gaining major corporate backing.

Can Redis persist data if the server shuts down?

Although it is an in-memory database, Redis can be configured to persist data to a physical disk. It achieves this durability through either point-in-time snapshots (RDB) or by logging every write operation using Append-Only Files (AOF).

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