Redis (Cache Layer)

Redis as a cache layer in front of a primary datastore (PostgreSQL, etc.) — not as a source of truth.

Connection Setup

Node.js — ioredis (recommended over node-redis for cluster/sentinel support)

import Redis from "ioredis";

const redis = new Redis(process.env.REDIS_URL ?? "redis://localhost:6379", {
  maxRetriesPerRequest: 3,
  enableAutoPipelining: true,
});

redis.on("error", (err) => console.error("[redis] connection error", err));