Caching & Redis Standards

Caching Strategy

• Layering: Use Multi-Level Caching for high-traffic read endpoints.
  • L1 (Local): In-Memory (Node.js heap). Ultra-fast, no network. Ideal for config/static data. Use lru-cache.
  • L2 (Distributed): Redis. Shared across pods.
• Pattern: Implement Stale-While-Revalidate where possible to avoid latency spikes during cache misses.

NestJS Implementation

• Library: Use cache-manager with cache-manager-redis-yet (Recommended over cache-manager-redis-store for better V4 support and stability).
• Interceptors: Use @UseInterceptors(CacheInterceptor) for simple GET responses.
  • Warning: By default, this uses the URL as the key. Ensure consistent query param ordering or custom key generators.
• Decorators: Standardize custom cache keys.