ElastiCache Deep Dive

In-Memory Caching and Performance

Redis vs Memcached

Redis

  • • Advanced data structures
  • • Persistence and backups
  • • Multi-AZ with failover
  • • Pub/Sub messaging

Memcached

  • • Simple key-value store
  • • Multi-threaded architecture
  • • Horizontal scaling
  • • Lower memory overhead

Caching Strategies

Lazy Loading

Load data into cache only when requested

Write Through

Write to cache and database simultaneously

Write Behind

Write to cache first, database later

ElastiCache Best Practices

  • • Use Redis for complex data structures and persistence
  • • Use Memcached for simple caching with horizontal scaling
  • • Implement proper cache invalidation strategies
  • • Monitor cache hit ratios and performance metrics
  • • Use cluster mode for Redis scaling and high availability
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