The Pick OS and its many derivatives had a non-relational database based on hashing at the core of the OS. Very popular a few decades ago but mostly dead now.

I do miss embedded SQL. The mismatch between database types and application language types caused by separating the two leads to lots of boilerplate and subtle bugs and logical inconsistencies.

I've been saying for years that I don't want Windows or MacOS or whatever.

All I really want is a simple OS with a built-in database and shell language for automating stuff with support for scientific computing. Maybe add some basic apps like email and a super simple word processor and text editor. I don't need much though.

> Databricks is often managing a million-ish Spark-sub tasks for various users. They couldn't do that using traditional operating system scheduling techniques: they needed something that could scale. The obvious answer was to put all scheduling information into a database. That's exactly what the Databricks guys did: they put it all in a PostgreSQL database, and then started whining about Postgres performance," says Stonebrake.

anyone know of a talk/paper discussing this scheduling "hack" in more detail

Well, you are not remembering this, but in fact exactly this was principle of AS400 platform with DB2.

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