From own experience, I'd say FDB can handle it all, we've got 20% read 80 write during peak hours, and reverse: 80 read 20 write other time.

Without doing your own tests, here's per core numbers, from which you can extrapolate (e.g. via CPU mips) towards your own hardware: https://apple.github.io/foundationdb/performance.html#throug...

FDB is ACID as is shipped, you don't need to turn knobs to make it such. Toughest part is to figure out classes/roles of the system. Here are a couple of good starting points: https://nikita.melkozerov.dev/posts/2019/06/building-a-found... https://forums.foundationdb.org/t/roles-classes-matrix/1340/...