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Lessons (7)

• Multi-Region and Disaster Recovery

  … Set RPO and RTO per data class. Acknowledged orders may require stronger replication than analytics or browse caches …

• Resilience, Disaster Recovery and Multi-Region Design

  Define RTO and RPO, choose a DR strategy, and design for failure across AZs and regions. Start with …

• Networking, DNS and Traffic Routing

  … capacity headroom. Region fails Fail over according to RPO/RTO and data policy. DNS record changed Keep TTL …

• Cost Optimization and the Well-Architected Framework

  … multi-region active-active doubles cost; justify it with RTO and RPO. - Managed versus self-managed : managed services …

• AWS Interview Questions: Clear Answers

  … Define RTO and RPO, protect backups, and demonstrate a restore. Name the consistency and cutover behavior during recovery …

• Collaborative Document Editing & Real-Time Sync

  … region Durability An acked edit is never lost (RPO = 0) Convergence Every replica ends up with an identical …

• Caching & Redis

  … Hash HSET , HGETALL User sessions, objects List LPUSH , RPOP , BLPOP Simple queues, recent activity Set SADD , SISMEMBER Unique …