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Amazon SQS FIFO Queue: Guaranteeing Ordered and Reliable Message Delivery
Amazon SQS (Simple Queue Service) provides a reliable message queueing service, enabling decoupled communication between different components of distributed systems. While the Standard Queue allows for high throughput with best-effort ordering and at-least-once delivery, there are cases when you need stricter guarantees. For these cases, Amazon SQS FIFO Queue (First-In-First-Out) is designed to ensure the exact order of messages and exactly-once processing, making it ideal for scenarios where message order and reliability are critical.
In this article, we’ll explore the functionality, key features, and best practices for using SQS FIFO queues in your applications.
What is a FIFO Queue?
A FIFO queue is a queue that follows the First-In-First-Out principle, meaning messages are delivered to consumers in the same order they were sent. Unlike the Standard Queue, which allows for potentially out-of-order messages and duplicate delivery, a FIFO queue maintains strict message order and ensures exactly-once processing.
Key characteristics include:
- Ordered Delivery: Messages are delivered in the order they’re received.
- Exactly-Once Processing: Each message is delivered and processed only once, ensuring no duplicates.
- Limited Throughput: Up to 300 messages per second without batching, or 3,000 messages per second with batching (a…