Your question is Design a Fast Analytics Dashboard Pipeline. Take a moment with it on the right.
Talk me through your thinking if you like. When you're confident, submit your answer and I'll grade it like a real screen (7/10 or better passes).
You are building the data pipeline behind a dashboard for a high-volume product. The dashboard is used throughout the day, so slow refreshes or stale numbers quickly become a problem for the people relying on it. You need a design that keeps the data current and the dashboard responsive.
How would you design a dashboard for a high-volume product where performance and refresh speed matter?