AWS SNS

AWS Simple Notification Service (SNS) is a fully managed messaging service that enables you to decouple microservices, distributed systems, and serverless applications. It provides high-throughput, push-based, many-to-many messaging between distributed systems, microservices, and event-driven serverless applications. SNS follows a publish/subscribe (pub/sub) messaging paradigm, where publishers send messages to topics and subscribers receive them. A topic is a logical access point and communication channel. Each topic can support multiple subscription endpoints where messages are delivered. Key features of SNS include: 1. Multiple Transport Protocols: SNS supports various delivery protocols including HTTP/HTTPS, Email, SMS, SQS, and Lambda functions. 2. Fanout Pattern: A single message published to an SNS topic can be delivered to multiple subscribers, enabling parallel processing. 3. Message Filtering: Subscribers can filter messages they receive based on message attributes. 4. Message Durability: SNS attempts to deliver messages at least once, with retry policies for HTTP endpoints. 5. Integration with AWS Services: SNS works seamlessly with services like CloudWatch for alarms, S3 for event notifications, and Lambda for serverless processing. 6. Cross-Region Delivery: Messages can be delivered to endpoints across different AWS regions. 7. Security: SNS provides encryption at rest using KMS and in-transit using HTTPS. Access control is managed through IAM policies and topic policies. Common use cases include: - Application alerts and notifications - Mobile push notifications - Email and SMS messaging - System alerts and monitoring - Workflow processing - Event-driven architectures SNS is priced based on the number of API requests, the number of notifications delivered, and additional charges for SMS notifications.

AWS Simple Notification Service (SNS) is a fully managed messaging service that enables you to decouple microservices, distributed systems, and serverless applications. It provides high-throughput, p…

Concepts covered: Topics, Message Delivery Status, AWS SNS Security, Message Retention and Reliability, Simple Notification Service (SNS), Subscriptions, Message Attributes, Fanout Pattern, SNS Filtering, SNS Protocol Support