Amazon SQS

Amazon Simple Queue Service (SQS) is a fully managed message queuing service that enables decoupling of application components. It allows different parts of a distributed system to communicate asynchronously.<br><br>SQS offers two types of queues:<br>1. Standard Queues: Provide maximum throughput, best-effort ordering, and at-least-once delivery.<br>2. FIFO Queues: Guarantee exactly-once processing and preserve the order of messages.<br><br>Key features:<br>- Unlimited throughput and elastic capacity<br>- Message retention period (up to 14 days)<br>- Visibility timeout (preventing multiple consumers from processing the same message)<br>- Dead-letter queues for handling problematic messages<br>- Long polling to reduce API calls and costs<br>- Encryption at rest and in transit<br>- Access control via IAM policies<br><br>SQS is commonly used in serverless architectures with Lambda, helping manage workloads by buffering requests. It integrates seamlessly with other AWS services like EC2, ECS, and SNS.<br><br>When designing solutions:<br>- Use SQS as a buffer for spiky workloads<br>- Implement SQS with Auto Scaling Groups to handle variable loads<br>- Use FIFO queues when message order and exactly-once processing are critical<br>- Configure appropriate visibility timeouts based on processing time<br>- Implement dead-letter queues to isolate problematic messages<br>- Consider batch operations for cost optimization<br><br>SQS helps build fault-tolerant, loosely coupled systems by:<br>- Preventing data loss during service disruptions<br>- Managing temporary spikes in request volumes<br>- Enabling asynchronous processing<br>- Distributing messages to multiple consumers<br>- Ensuring application components can scale independently<br><br>Pricing is based on the number of API requests, with batching available to optimize costs.

Amazon Simple Queue Service (SQS) is a fully managed message queuing service that enables decoupling of application components. It allows different parts of a distributed system to communicate asynch…

Concepts covered: Amazon Simple Queue Service (SQS), Dead Letter Queue, FIFO Queue, Short Polling vs Long Polling, Scaling Amazon SQS, SQS Queue Types, Visibility Timeout, Long Polling, Message Retention Period, Batch Operations, Amazon SQS Event Source for AWS Lambda, Message Group ID, Message Deduplication