Design Top-K System — Section 4: High-Level Architecture
Goal of this section: Describe the major components, end-to-end flows, and how the system scales and fails safely.
1. Architectural Overview
At a high level, the Top-K system is split into three planes:
- Ingestion Plane — collects and validates events
- Computation Plane — aggregates, ranks, and builds Top-K lists
- Serving Plane — serves Top-K lists at low latency
This separation keeps reads fast and writes scalable.
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