redis-pro-dev

• SKILL.mdcore · 8,249 bytes

## Overview

Redis is an in-memory data-structure server that teams use as a cache, session store, rate limiter, queue, pub/sub bus, and sometimes a primary database. Its power comes from the data structures — strings, hashes, lists, sets, sorted sets, streams — each with atomic operations that let you build correct concurrent systems without a database round trip.

The failure mode is treating Redis as magic fast storage without understanding eviction, persistence, and single-threaded command execution. This skill covers using the right structure for the job, caching patterns that stay correct, and operating Redis (persistence, clustering, memory) in production.

## When to use

- Adding caching to an application (choosing structure and pattern).
- Implementing rate limiting, leaderboards, sessions, or locks.
- Choosing between Redis pub/sub, Streams, lists, or a dedicated queue.
- Designing Redis key schemas and TTL strategies.
- Operating Redis in production (persistence, replication, Cluster, Sentinel).
- Debugging memory growth, eviction, or latency spikes.