Two Options:

ElastiCache offers two caching engines:

1. Redis (Recommended for most cases)
2. Memcached (Simple caching only)

REDIS (Recommended)

Think of Redis as: Advanced, feature-rich cache with backup

Features:

1. Multi-AZ with Auto-Failover

• Runs in multiple data centers
• If one fails, automatic switch to backup
• High availability

2. Read Replicas

• Can have multiple copies for reading
• Scale reads across replicas
• High availability

3. Data Durability (AOF Persistence)

• Saves data to disk as backup
• Can recover cache if server restarts
• Data is not lost!