Application Integration
Amazon SNS
Amazon SNS publishes messages to multiple subscribers through topics. It is useful when one GenAI operational event must reach queues, functions, HTTPS endpoints, or human notification channels.
Key points
- Standard topics favor throughput while FIFO topics add ordering and deduplication
- Subscription filter policies reduce unwanted delivery
- SNS does not retain messages for later consumption like a queue
When to use it
- Fan out model-degradation alerts to remediation teams
- Deliver completed batch-generation notifications to several systems
Exam tips
- Pair SNS with SQS when each subscriber needs durable buffering
- Do not use a topic alone when a temporarily unavailable consumer must replay old messages