Caching & Redis Standards

Priority: P1 (OPERATIONAL)

Caching Strategy

• Layering: Use Multi-Level Caching for high-traffic read endpoints.
• L1 (Local): In-Memory (Node.js heap). Ultra-fast, no network. Use lru-cache for config/static data.
• L2 (Distributed): Redis. Shared across pods.
• Pattern: Implement Stale-While-Revalidate 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 V4 stability).
• Interceptors: Use @UseInterceptors(CacheInterceptor) for simple GET responses.
• Warning: Default key URL. Ensure consistent query param ordering or use custom key generators.

See implementation examples