Data & Analytics

Redis Caching & Data Store

Use Redis for high-performance caching, session storage, pub/sub messaging, and real-time leaderboards.

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Overview

node-redis is the official Redis client for Node.js, providing a modern async API for all Redis commands. Redis is an in-memory data structure store used as a cache, message broker, and database. It supports strings, hashes, lists, sets, sorted sets, streams, and HyperLogLog data structures, each optimized for specific use cases.

As a cache, Redis dramatically reduces database load by storing frequently accessed data in memory with configurable TTL (time-to-live). Cache-aside, write-through, and write-behind patterns can be implemented depending on consistency requirements. Redis also serves as a session store, replacing server-side session storage with a shared, fast store that works across multiple application instances.

Beyond caching, Redis provides pub/sub messaging for real-time features, sorted sets for leaderboards and rate limiting, streams for event sourcing, and Lua scripting for atomic operations. Redis Cluster provides horizontal scaling with automatic sharding, while Redis Sentinel handles high availability with automatic failover. The node-redis client supports pipelining, transactions, and client-side caching for optimal performance.

Who Is This For?

Cache database query results with configurable TTL
Store user sessions in Redis for multi-server deployments
Implement real-time pub/sub messaging between services
Build leaderboards and ranking systems with sorted sets

Installation

Setup for Claude Code

npm install redis

Configuration

import { createClient } from "redis"

const redis = createClient({ url: process.env.REDIS_URL })
await redis.connect()

// Cache with TTL
await redis.setEx("user:123", 3600, JSON.stringify(userData))
const cached = await redis.get("user:123")

// Pub/Sub
await redis.publish("notifications", JSON.stringify(event))