They seem to do something a little unusual where every DNS request provides a different IP out of a small pool with those IPs not changing very frequently. (I’m talking specifically about S3 not Route5x or whatever the DNS product is).
Basically like round robin, but instead of providing all of the IPs they are only offering one. This eliminates options for the client DNS resolvers, but may make some things more deterministic. Is this a “normal” or expected solution or just some local hackery? Thanks in advance, DJ
