Q: What is the difference between SQS and SNS?
SNS = pub/sub, one message to many subscribers (fan-out). SQS = queue, message stored until a consumer reads and deletes it (point-to-poi...
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🎙️ Candidate Opening & Architectural Context
""AWS reliability requires differentiating between AWS control plane limits and host-level resource exhaustion. When addressing this question, I walk the interviewer through our production incident runbook: isolating the blast radius, checking diagnostic logs and metrics, and applying a safe fix.""
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🛠️ Production Runbook & Step-by-Step Resolution
1️⃣
Production Solution & Architecture
SNS = pub/sub, one message to many subscribers (fan-out). SQS = queue, message stored until a consumer reads and deletes it (point-to-point). Combine: SNS fan-out to multiple SQS queues.
💡 The Senior SRE Gold Nugget (Key Architectural Takeaway)
"Pro-Tip: SNS = pub/sub, one message to many subscribers (fan-out). SQS = queue, message stored until a consumer reads and deletes it (point."
⚡ 60-Second Elevator Pitch Talking Points
- Immediate Triage: SNS = pub/sub, one message to many subscribers (fan-out). SQS = queue, message stored until a c
- Run targeted verification commands before modifying configuration.
- Automate permanent guardrails (CI check, alerts, IaC policy) to prevent recurrence.
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