Hacker News Reader

Facebook/meta uses mySQL, but with a completely different engine (myrocks) and sharding techniques.

YouTube uses mySQL but they've also rewritten major portions for scalability. (Vitess)

Just because a company is using a technology you've heard of doesn't mean it's what you expect.

YouTube uses Spanner now, they migrated off Vitess a while ago

Can you share why they migrated?

Vitess seemed to be working for them for a long time.

When Vitess was donated to CNCF, there was an internal push from within Google to migrate everything to Spanner.

I do not know any other reason.

Disclaimer: Vitess Maintainer

> YouTube uses mySQL but they've also rewritten major portions for scalability. (Vitess)

I imagine this is some very old info(like 10 yo) and could change since then?