Have you given https://apple.github.io/foundationdb/time-series.html a read? Since FoundationDB is lexicographically sorted it's pretty straight forward to keep things sorted for reading data in chronological order.

For example, if you want to read "last 5 minutes" of data, you can keep your timestamp at the end of the key in reverse order (Long.MaxValue - timestamp).

Yeah, but that doc assumes you've read and understood everything else in the docs. That document provides no help in understanding the database, it's concepts, or how to implement them. I could try and reconcile that doc with the python tutorial and everything else, but I just want something where I can copy and paste and it works.

FoundationDB doesn't have a batteries included documentation like Clickhouse does: https://clickhouse.yandex/tutorial.html