description Amazon SQS Overview
Simple Queue Service (SQS) is the industry standard for decoupling microservices. It allows different parts of an application to communicate asynchronously by placing messages onto a queue. This means that if one service fails or slows down, the other service can continue operating, and the message will wait reliably in the queue until the consumer is ready, drastically improving system resilience.
help Amazon SQS FAQ
What is the difference between Amazon SQS Standard and FIFO queues?
Amazon SQS Standard queues offer maximum throughput, at-least-once delivery, and best-effort ordering, but do not guarantee exact message sequence. FIFO (First-In-First-Out) queues guarantee exact message ordering and exactly-once processing, but cap the throughput at 300 messages per second.
How does Amazon SQS handle message retention and dead-letter queues?
SQS allows you to configure a message retention period ranging from one minute up to a maximum of 14 days. If a message fails to process after a specified number of receives, it can be automatically routed to a Dead-Letter Queue for manual inspection.
Can AWS Lambda directly trigger off an Amazon SQS queue?
Yes, you can configure AWS Lambda to poll an SQS queue automatically and invoke a Lambda function whenever new messages arrive. This is a common serverless architecture pattern for processing asynchronous tasks without needing to manage underlying servers.
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