HLD VS. LLD DESIGN : UNDERSTANDING THE ARCHITECTURAL VARIATION

The key difference between a Top-Level Plan (HLD) and a Low-Level Design (LLD) lies in their breadth . An HLD provides a high-level view of the solution, outlining the major components and their connections – it's essentially the "what" and "why." Conversely, an LLD delves into the granular parti

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