DNS configuration management
Route 53 used as a store for application configuration.
This approach uses Amazon Route 53 records as configuration data. Applications can read settings from DNS rather than from a separate configuration service.
DNS offers a distributed read path and simple replication, but also inherits DNS caching and update delays. Those properties must be part of the design.
Primary source: https://www.lastweekinaws.com/podcast/aws-morning-brief/whiteboard-confessional-route-53-db/