sqs

# AWS SQS Amazon Simple Queue Service (SQS) is a fully managed message queuing service for decoupling and scaling microservices, distributed systems, and serverless applications. ## Table of Contents - [Core Concepts](#core-concepts) - [Common Patterns](#common-patterns) - [CLI Reference](#cli-reference) - [Best Practices](#best-practices) - [Troubleshooting](#troubleshooting) - [References](#references) ## Core Concepts ### Queue Types | Type | Description | Use Case | |------|-------------|----------| | **Standard** | At-least-once, best-effort ordering | High throughput | | **FIFO** | Exactly-once, strict ordering | Order-sensitive processing | ### Key Settings | Setting | Description | Default | |---------|-------------|---------| | **Visibility Timeout** | Time message is hidden after receive | 30 seconds | | **Message Retention** | How long messages are kept | 4 days (max 14) | | **Delay Seconds** | Delay before message is available | 0 | | **Max Message Size** | Maximum message size | 256 KB | ### Dead-Letter Queue (DLQ) Queue for messages that failed processing after maxReceiveCount attempts. ## Common Patterns ### Create a Standard Queue **AWS CLI:** ```bash aws sqs create-queue \ --queue-name my-queue \ --attributes '{ "VisibilityTimeout": "60", "MessageRetentionPeriod": "604800", "ReceiveMessageWaitTimeSeconds": "20" }' ``` **boto3:** ```python import boto3 sqs = boto3.client('sqs') response = sqs.create_queue( QueueName='my-...