PGSimCity – an explorable 3D model that shows how Postgres works (github.com)

This is awesome, what a cool idea!

Someone ported it to ClickHouse: https://slach.github.io/CHSimCity/

Though it looks much simpler - fewer moving parts.

Repost of https://news.ycombinator.com/item?id=49063754 two days ago - c'mon.