Spanner is geographically distributed and synchronizes over Google’s fiber. I’m not sure where FoundationDB falls on the spectrum, but there is “distributed” m

Spanner is geographically distributed and synchronizes over Google’s fiber. I’m not sure where FoundationDB falls on the spectrum, but there is “distributed” meaning runs on multiple machines, vs multiple availability zones (which could be in the same rough geographic area to minimize latency), vs multiple geographic regions, which is one of Google’s design goals for its distributed infrastructure nowadays: to be able to withstand a natural disaster or other disruption that takes a whole region offline, without missing a beat. There’s still a lot to be said for the property, “scales horizontally to N machines,” of course, even if those machines have to be in the same data center.