Take business process modeling [0], and add a dash of directed acyclic graph [1]. You need both fast access to a massive amount of historical data, and the abi

Take business process modeling [0], and add a dash of directed acyclic graph [1]. You need both fast access to a massive amount of historical data, and the ability to finely control what gets stored where in memory - so not something you can really do in an SQL transaction. [0] https://en.wikipedia.org/wiki/Business_process_modeling https://en.wikipedia.org/wiki/Business_process_modeling [1] https://en.wikipedia.org/wiki/Directed_acyclic_graph https://en.wikipedia.org/wiki/Directed_acyclic_graph