Never say “never”. ;-) Notice I did not say “you must” or “you should”. It is something to consider based on how many 9s are important to your business. The job of many of us is to think of those things that are highly unlikely, assign a risk and make a plan (or not) accordingly. The likely ones are written down and “anyone” can follow them. In this case I’d say the risk is higher that someone puts the wrong info into a DNS change and if they are in different services and not automatically replicated, you could be better off. Again, what are the risks to your business? On Aug 12, 2016, at 2:24 PM, Peter Beckman <beckman@angryox.com<mailto:beckman@angryox.com>> wrote: If there are other metrics in which to measure DNS speed, availability and redundancy, I'd love to seeing them. I have but my own datapoint and the metrics from others. Tear down the testing model, but at least show a different/better one in return. On Fri, 12 Aug 2016, Keith Stokes wrote: Route53 can get expensive for lots of domains. Queries are cheap with the first 1M free, but if you have 1000 domains you’ll pay $500/month. You can build dedicated servers in multiple AZs and data centers able to handle that many domains for far less. You might also consider running dedicated servers in each of AWS and Azure to avoid a single-provider failure. Having worked for AWS, there is no "global" control plane that would bring two regions down at the same time. While possible, due to say a targeted successful attack on both regions simultaneously, highly unlikely. Control and data plane software updates and deployments are done regionally, and often on an Availability Zone basis where applicable, to ensure there are no defects. Automation measures and will automatically roll back code that breaks deployment metrics. It's pretty sweet. Their internal tools team does amazing things with automation. Route53 is $0.50 per month per "zone" (domain) for the FIRST 25, then $0.10 per month per zone after that. 1000 domains would be $110 a month, not $500. 500 million queries at $0.40 per million, another $200/month. Who knows if you need that much, but it is pretty affordable. Beckman --------------------------------------------------------------------------- Peter Beckman Internet Guy beckman@angryox.com<mailto:beckman@angryox.com> http://www.angryox.com/ --------------------------------------------------------------------------- --- Keith Stokes