When building software , there's vital to appreciate the separate roles of HLD and detailed design. High-level design provides a overall view of the system , illustrating the principal parts and their interactions excluding detailed execution specifics. Conversely , LLD goes into the engineering spe

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