Cloud Architecture

Decoupled Event Fan-Out via SNS and SQS

Cloud Architecture diagram · made in Skemio

Fan-out architecture diagram showing an Order Service publishing to an SNS topic that fans out to three SQS queues feeding different workers.
Fan-out architecture diagram showing an Order Service publishing to an SNS topic that fans out to three SQS queues feeding different workers.
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What it shows

  • Publishers post once to SNS without knowing consumer identities or count
  • Dedicated SQS queues buffer spikes and isolate slow downstream workers
  • SNS subscription filter policies prevent queues from receiving noisy events

The takeaway

SNS to SQS fan-out guarantees asynchronous broadcast resilience with total consumer isolation.

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