Redis (Remote Dictionary Server)

• Single-threaded
• In-memory database
  • RAM : 120 ns
  • SSD: 50-150 us
  • HDD: 1-10 ms

Run on Docker

services:
	redis:
		image: redis:7-alpine
		container_name: redis
		ports:
			- "6379:6379"

docker compose up -d
docker exec -it redis redis-cli
docker compose down

Commands

SET name Tom
setex name 10 Tom  # expires in 10 seconds
GET name
DEL name
EXISTS name
flushall
ttl name
expire name 10

lpush names Tom
lrange names 0 -1

https://youtu.be/jgpVdJB2sKQ?t=594

Use Cases

• Caching
• Rate Limiter
• Top N ranking