Backend on Hancic Tech Bloghttps://en.hancic.site/tags/backend/Recent content in Backend on Hancic Tech BlogHugoen-usFri, 18 Sep 2026 00:00:00 +0000Cache Invalidation: Three Patterns and the Cost of Getting It Wronghttps://en.hancic.site/cache-invalidation-three-patterns/Fri, 18 Sep 2026 00:00:00 +0000https://en.hancic.site/cache-invalidation-three-patterns/TTL, event-driven, and write-through each pay a different cost for keeping cache aligned with the source of truth. Pick one and own its failure mode.