edge infrastructureadvancedReddit r/ExperiencedDevs thread with 400+ upvotesMAX
DNS Propagation Staleness in Multi-Region Failover : Deploy Atomicity and Instant Rollback at the Edge
GoRoute53EnvoyPrometheus
Problem Breakdown
The reliability defect is deploy non-atomicity: edge deploys propagate across POPs asynchronously, so for a propagation window users receive a mix of old and new code and data depending on which instance serves them. Multi-region failover relies on DNS TTLs to redirect traffic after a region failure, but resolvers acro…
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