Redis Patterns

Production patterns for Redis covering caching, session management, rate limiting, distributed systems, and performance optimization.

Cache-Aside Pattern

BAD: No TTL, cache stampede vulnerability

// ioredis
import Redis from 'ioredis';
const redis = new Redis();

async function getUser(id: string) {
  const cached = await redis.get(`user:${id}`);
  if (cached) return JSON.parse(cached);