[samhw]

I mean, this post from a year ago makes it sound not that non-standard: https://engineering.fb.com/2021/07/22/data-infrastructure/my...

What you're describing sounds like you mean something on the level of Cockroach, talking the Postgres wire protocol but implemented entirely independently underneath (which came indirectly out of Google). Facebook's MySQL deployment sounds more like a heavily-patched-but-basically-MySQL installation. I think Facebook is overanalogised to Google sometimes, as an engineering org.

(Admittedly I haven't worked at either whereas you have - though I have at another FAANG fwliw - but am basing this impression partly on what I hear from friends & partly on plain old stuff I read on the internet.)

[Shish2k]

FB uses mysql in two very different ways - for the giant social-network database, mysql is basically a key-value store used as the storage layer for the graph database built on top. Then for the thousands of small utility databases (small enough to fit on a single machine) it’s used in a very vanilla way.