Concerning developing applications, it's necessary to appreciate the separate roles of HLD and LLD . High-level design provides a overall perspective of the system , describing the core parts and their relationships excluding granular implementation specifics. In contrast , Low-level 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 the product can tolerate. A pr