If creating systems , it is essential to comprehend the separate roles of HLD and LLD . High-level design provides a broader perspective of the application , outlining the major components and their relationships omitting specific execution specifics. Conversely , LLD delves into the technical s

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