When you hit huge scaling challenges, you do what's called sharting. The application doesn't just talk to one data base any more. Now it's talking to let's call it two, or four, eight or sixteen or thirty two. And i went through all f those sort of itoratio changes. Oh, y lord. Each time there was like a additional complexity,. Like there were things that just would really break - and you had to fundamentally solve the problem by coming up with a new piece of technology which could help ameliorate the situation. When you've sharted, shout out, along came polly. If you don't know what it in gray year...