https://www.compilemymind.com/tags/system-design/ Recent content in System-Design on Compile My Mind Hugo en Mon, 20 Jul 2026 18:45:00 +0300 https://www.compilemymind.com/posts/system-design-caching-cache-aside-expiration-invalidation/ Mon, 20 Jul 2026 12:35:30 +0300 https://www.compilemymind.com/posts/system-design-caching-cache-aside-expiration-invalidation/ <p>A cache is a second representation of data placed closer to a reader or cheaper execution path. It can reduce latency and origin load, but it also introduces another state boundary that can be empty, stale, unavailable, or inconsistent with the source of truth. Good cache design therefore starts with workload and correctness requirements, not with a product selection or a target hit ratio.</p> <p><figure> <img src="https://www.compilemymind.com/posts/system-design-caching-cache-aside-expiration-invalidation/concept-flow.svg" alt="Cache-aside lifecycle, expiration, and invalidation flow" width="1200" height="830" loading="lazy" decoding="async"> </figure></p>