Redis

Configure Redis for caching and data storage.

Installation & Setup

Install

apt install redis-server

Configuration

/etc/redis/redis.conf

bind 0.0.0.0 protected-mode yes requirepass yourpassword maxmemory 256mb maxmemory-policy allkeys-lru

Basic Operations

redis-cli -a yourpassword

String operations

SET key "value" GET key SETEX key 3600 "value" # With TTL

Hash

HSET user:1 name "John" email "john@example.com" HGETALL user:1

List

LPUSH queue "task1" RPOP queue

Persistence

RDB (snapshot)

save 900 1 save 300 10

AOF (append-only file)

appendonly yes appendfsync everysec

Sentinel (HA)

sentinel.conf

sentinel monitor mymaster 10.0.0.1 6379 2 sentinel down-after-milliseconds mymaster 30000 sentinel failover-timeout mymaster 180000

Best Practices

• Set maxmemory and eviction policy

• Use persistence for critical data

• Implement Sentinel for HA

• Monitor memory usage