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Jul 5, 2026 · Backend Development

From Ad‑hoc to Strict Layering: Managing Service Dependencies at Ten‑Million QPS

An unexpected restart of an edge user‑tag service caused a core transaction chain to fail, exposing how reverse and circular dependencies can turn a clean layered architecture into a tangled web; the article explains the hidden costs of such chaos and outlines two hard rules and a step‑by‑step path to enforce strict, acyclic layering for systems handling tens of millions of QPS.