Twitter did a big post back in 2014:
https://blog.twitter.com/engineering/en_us/a/2014/manhattan-our-real-time-multi-tenant-distributed-database-for-twitter-scale
A follow up in 2016:
https://blog.twitter.com/engineering/en_us/topics/insights/2016/manhattan-software-deployments-how-we-deploy-twitter-s-large-scale-distributed-database
I cannot find anything since then.
Has Twitter, in recent years, written much about its database?