The Stale Edge Problem: How Distributed Cache Inconsistency Is Quietly Undermining User Trust
When different edge nodes serve different versions of the same content to different users simultaneously, the result is an experience that is difficult to debug, nearly impossible to reproduce, and deeply corrosive to user confidence. Understanding how distributed cache inconsistency develops — and how to resolve it before users surface it — is one of the most underappreciated disciplines in modern CDN operations.