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Amazon Simple Queue Service (SQS) is a fully managed message queuing service that enables you to decouple and scale microservices, distributed systems, and serverless applications. SQS was the very first service AWS ever launched (in 2004) and remains one of the most heavily used services in the entire platform.
A message queue is a form of asynchronous communication. A producer places a message on the queue, and a consumer retrieves it later. The queue acts as a buffer between the two, decoupling their execution.
Producer ——> [SQS Queue] ——> Consumer
The producer does not wait for the consumer to process the message. The consumer pulls messages from the queue at its own pace.
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