SQS Queues and SNS Notifications – Now Best Friends | AWS Official Blog
One common design pattern is called “fanout.” In this pattern, a message published to an SNS topic is distributed to a number of SQS queues in parallel. By using this pattern, you can build applications that take advantage parallel, asynchronous processing. For example, you could publish a message to a topic every time a new image is uploaded. Independent processes, each reading from a separate SQS queue, could generate thumbnails, perform image recognition, and store metadata about the image:
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