The article claims that web browsers will automatically pick a healthy backend when you return multiple A records, but the behavior doesn't seem acceptable to m

The article claims that web browsers will automatically pick a healthy backend when you return multiple A records, but the behavior doesn't seem acceptable to me. I was going to post "I've never seen it work", but I just tried it and it does indeed work -- the browser hangs for 30 seconds while it waits for the faulty IP address to time out, and then it eventually tries the other IP address, and it does work. (It then retains its selection for a while; I was too lazy to see what happens if I invert the healthiness of the two backends. I also didn't try more than 2.) I think most people would call a website down if it was just a white screen for 30 seconds, so while it's a nice try on the part of the browsers, you can see why people use short TTLs to get bad backends out of the pool as quickly as possible.