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Pub/Sub Architecture in Cloud Computing

Learn about Pub/Sub Architecture in this comprehensive Cloud Computing tutorial. Broadcasting events.

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1Why Fan-Out?

If an e-commerce order is placed, you need to bill the user, update inventory, and start shipping. Instead of the frontend calling 3 APIs, it sends 1 message to SNS. SNS securely 'fans out' that message to 3 separate SQS queues, guaranteeing delivery to all microservices.