If building software , it's necessary to appreciate the separate roles of HLD and LLD . High-level design provides a larger view of the application , illustrating the major parts and their relationships without granular execution specifics. On the other hand, LLD descends into the engineering detai

Caching Strategies Start With One Question: How Stale Can This Data Be? Most caching answers jump click here 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 tol