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Architecture explainers. Plate 2 of 6.

How CDNs Decide Where to Serve a RequestA sourced look at how CDNs choose an edge location: Anycast, GeoDNS, cache lookup, and why the nearest data center is not always the fastest.2026-10-266 minAmazon RDS Handles Database FailoverHow Amazon RDS Multi-AZ failover works: synchronous standby in another AZ, DNS cutover, RPO/RTO tradeoffs, and what Multi-AZ does not replace — grounded in AWS docs.2026-10-2615 minAmazon SQS WorksA grounded explainer of Amazon SQS Works from public sources.2026-10-2410 minGoogle Spanner Achieves Global ConsistencyA grounded explainer of Google Spanner Achieves Global Consistency from public sources.2026-10-2316 minHow Google Pub/Sub WorksA grounded explainer of Google Pub/Sub Works from public sources.2026-10-229 minHow Netflix Uses Caching at ScaleA grounded explainer of Netflix Uses Caching at Scale from public sources.2026-10-227 min

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