Redis Cheatsheet

Redis CLI provides various commands to establish and manage connections to Redis servers. These commands allow you to connect to a server, authenticate, select databases, test connectivity, and utilize various command-line options.

Redis keys are binary safe strings that identify stored values. The key management commands allow you to search for keys matching patterns, check existence, delete keys, set expiration times, and perform other key-related operations.

Redis strings are the most basic data type and can store text, integers, or binary data up to 512MB in size. String operations allow you to set, retrieve, and manipulate these values with various commands.

Redis lists are linked lists of string values, allowing for fast operations at both ends. They're ideal for implementing queues, stacks, and for tracking the latest items in applications like social media feeds or logs.

Redis sets are unordered collections of unique strings. Set operations allow you to add, remove, and query members, as well as perform mathematical set operations like unions, intersections, and differences between multiple sets.

Redis hashes are maps between string fields and string values, making them perfect for representing objects. Hash commands allow you to store, retrieve, and manipulate these field-value pairs within a single key.

Redis sorted sets are collections where each member is associated with a score that determines its position. They enable efficient range queries, ordered traversal, and operations based on scores, making them ideal for leaderboards, rate limiters, and time-based data access.

Redis Pub/Sub is a messaging pattern where senders (publishers) send messages to channels without knowledge of subscribers. Subscribers receive messages from channels they're interested in without knowledge of publishers. This enables loosely coupled, scalable real-time communication between components.

Redis transactions allow executing multiple commands as a single atomic operation. They ensure that either all commands execute or none do. Redis transactions are optimistic, using WATCH to detect changes to keys during transaction preparation.

Redis server management commands allow administrators to monitor, configure, and control Redis server instances. These commands provide insights into server statistics, configuration parameters, database size, and performance metrics.

Redis supports Lua scripting for executing complex operations atomically. Scripts are executed server-side, reducing network overhead and ensuring atomicity. Redis caches scripts by their SHA1 hash, allowing efficient repeated execution without resending the entire script.

Redis Cluster provides a way to run a Redis installation where data is automatically sharded across multiple Redis nodes. These commands help manage and inspect Redis cluster configurations, node relationships, and key distribution.

Redis provides a comprehensive set of commands for debugging and monitoring server performance, client connections, memory usage, and latency issues. These tools are essential for troubleshooting problems and optimizing Redis deployments.