[avar]

DB and infra folks are often tasked with shoveling shit uphill, and aren't in total control over how data or schemas get organized.

[throwusawayus]

that's fair. i am just raising an eyebrow to github's apparent lack of sharding, as described in their incident reports -- while these engineers all left to join a db company that focuses specifically on sharding -- it seems like an experience mismatch.

if they were all sharding experts why wasn't github sharded properly. other large mysql shops have solved this, all the way back to the days of yahoo and flickr and livejournal