If creating systems , it is necessary to understand the contrasting roles of HLD and detailed design. Top-level design provides a larger picture of the application , outlining the major modules and their connections without specific implementation specifics. In contrast , Detailed design goes in

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