TTL does not matter because I am not adding or removing systems from my DNS record. Even during an outage, a request to my domain name will return both the broken and the working load balancers.
I am simply giving a list of servers that can answer a request.. clients know to keep trying till one works. (Which they all do. Try it!)
Basecamp/SignalvsNoise/37signals had an article up on how they used Dyn.coms DNS service to achieve something like this, but I can't seem to find it. They had some nice graphs for when they tested it out.
I am simply giving a list of servers that can answer a request.. clients know to keep trying till one works. (Which they all do. Try it!)