edge infrastructureintermediateReddit r/ExperiencedDevs thread with 400+ upvotesMAX
DNS Propagation Staleness in Multi-Region Failover : Multi-Tenant Isolation Under Shared Edge Resources
GoRoute53EnvoyPrometheus
Problem Breakdown
The isolation defect appears when multiple tenants share edge compute and cache: one tenant's traffic pattern (a burst, a pathological cache-miss loop, a runaway script) consumes a disproportionate share of shared CPU, memory, and cache space, degrading every co-tenant. Multi-region failover relies on DNS TTLs to redir…
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