[zaarn]

We live in a world where MongoDB is at the butt-end of all Database and ACID jokes.

But the award should go the Windows Registry, a Key-Value store that combines the drawbacks of a half-assed filesystem with the advantages of piping your database to /dev/null.

A Database would be capable of using an index to traverse all the keys. The Registry does a linear lookup at each pathnode.

There is a good blogpost [https://rwmj.wordpress.com/2010/02/18/why-the-windows-regist...] that details the insanity of a database that managed to be worse than MongoDB at the lowest level of jokes before MongoDB was even invented.