Redis · Module 10 of 10

Redis in real apps

Using Redis safely in production: security, memory and common app patterns.

📖 Key ideas

Never expose Redis to the internet; bind to a private network and set a password or ACL users.
Set maxmemory and an eviction policy like allkeys-lru for caches.
Avoid KEYS * in production; use SCAN instead.
Rate limiting: INCR a per-user key with a 60-second expiry.
Use client libraries such as ioredis (Node.js) or redis-py (Python).

💡 Real-life example: Like a shop counter: keep it inside the shop, decide what to throw out when shelves are full, and never empty every drawer to find one item.

maxmemoryLimit on how much RAM Redis uses

allkeys-lruEvict least recently used keys

SCANWalk keys in small batches

ACLUsers with limited commands and keys