As a young gun coming from working in games before touching "internet"/"enterprise" software back around 2006 I had an eye on performance matters and all the early Google papers caught my eye (esp as I was on a project with an overpositive sales CEO that had in his mind that we'd run to Google valuations within a year).
A sobering account was our second CTO who told us that their previous 65000 user application ran on a single database/server, so for the rest of that project we just kept most our application on a single DB and focused on tuning that where needed.
A sobering account was our second CTO who told us that their previous 65000 user application ran on a single database/server, so for the rest of that project we just kept most our application on a single DB and focused on tuning that where needed.