When software design , there's critical to comprehend a distinction between a High-Level Architecture (HLD) and a Low-Level Architecture (LLD). The HLD provides a bird's-eye perspective of the entire system , describing principal components and their relationships . In contrast , an LLD dives mor

Caching Strategies Start With One Question: How Stale Can This Data Be? Most caching answers jump straight to Redis. The stronger answer starts one step earlier. Caching is a deliberate trade of freshness for speed, so the first thing to establish is how much staleness t