SL#163 - AWS Services (42/120) - Amazon SNS: Fan-Out, Filter Policies, and the Subscription You Forgot to Give a Dead-Letter Queue

SNS is the service that turns one publish into many deliveries, and then quietly discards the ones that fail. We build a topic that fans out to three queues with filter policies, add a dead-letter queue, and a FIFO topic with replay. Plan for about 45 minutes and a few cents.