Concerning building software , there's vital to appreciate the distinct roles of HLD and LLD . High-level design provides a larger view of the system , outlining the major parts and their connections excluding detailed realization specifics. In contrast , LLD descends into the engineering specif

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