When developing software , there's vital to appreciate the contrasting roles of HLD and LLD . Top-level design provides a larger view of the system , outlining the major parts and their connections omitting granular implementation specifics. On the other hand, Detailed design goes into the techni

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