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Also how many people use a remote backend for edge nodes? This means that a network outage means a k8s outage correct?

We don’t collect any of those sort of statistics. I will say that latency is pretty important to the apiserver, so putting the database at a different site than the server nodes probably wouldn’t work super well.

It's a suggested topology though?

Yeah unfortunately (well depending on how you view "phone-home" software) we have no statistics on how K3s is used, its all word-of-mouth. I haven't seen much use of Postgres personally, but that doesn't mean its not out there.

Personal experience i had is mysql backend performed better than postgres. Unclear why https://github.com/k3s-io/kine/issues/63