Fanout Architecture using Amazon SNS and SQS

Fanout is a common messaging pattern used in distributed architectures, such as event-driven architectures, where messages from one producer are sent to multiple consumers for synchronous processing. In the fanout pattern, we have the following components:

• Producers: Producers are the entities that send messages or events that need to be processed.

• Exchange point: The messages from a producer are sent to an exchange point, which is responsible for delivering the messages to their respective destinations.

• Queues: Messages sent from an exchange point are stored in a queue.

• Consumers: Consumers fetch messages from a queue and process them.

Fanout using SNS and SQS

Solution architects can use Amazon SNS and Amazon SQS to create a fanout pattern in their cloud applications. Amazon SNS uses a push mechanism to deliver time-critical messages to its subscribers, while Amazon SQS uses a polling method to allow users to fetch messages from a queue whenever they are available.

Amazon SNS can be used as an exchange point, and Amazon SQS can be used to store messages to build a fanout messaging pattern. Any messages Amazon SNS receives from a consumer will immediately be sent to its subscribers. We can add multiple SQS queues as subscribers to our SNS topic, which will store these messages and deliver them whenever a consumer makes a polling request.