One of the best design decision we come up with for a cluster configuration synchronization feature between nodes of our appliance born during an ad-hoc conversation between 3 senior engineers. We made the decision in like 2 hours. No long and unnecessary meetings with architects or week-long planning. It was made for a 1 million dollar deal and we finished in a couple of months. You could probably guess how the "architecture" looked like; we downloaded the config files from a web server running inside the cluster. That's it.
