edge infrastructureexpertReddit r/ExperiencedDevs thread with 400+ upvotesMAX
DNS Propagation Staleness in Multi-Region Failover : Latency Budget Enforcement Across the Edge Path
GoRoute53EnvoyPrometheus
Problem Breakdown
The defect is unmanaged latency composition: each hop in the edge path (DNS, POP routing, function execution, cache lookup, origin fetch) consumes its own slice of the user's patience with no global budget. Multi-region failover relies on DNS TTLs to redirect traffic after a region failure, but resolvers across the int…
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