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B2B Engineering Insights & Architectural Teardowns

Latency-aware proxy vs DNS: how to balance S3 load

DNS round-robin stops working under load when clients start caching responses. Agoda faced this issue at the object storage level and moved the balancing to a separate layer. The problem manifested during the increase in data workloads. S3-compatible endpoints used DNS round-robin to distribute traffic. In practice, clients cached DNS responses and continued to hit … Read more

Granular data residency at the edge without sacrificing global network

Cloudflare adds Custom Regions to align global edge with local restrictions. This is a response to compliance pressures that are beginning to impact routing architecture. The problem arises when the global edge model encounters data localization requirements. Cloudflare’s architecture, by default, optimizes latency through the nearest data center. However, once requirements emerge to keep TLS … Read more

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