When developing systems , it is essential to understand the contrasting roles of HLD and detailed design. High-level design provides a broader view of the system , describing the major parts and their interactions omitting specific realization specifics. On the other hand, Low-level design descen

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