How Tesla built a quadrillion-scale observability platform on ClickHouse

Tesla has developed Comet, a powerful observability platform built on ClickHouse, to manage the massive scale of data generated by its global operations, including Gigafactories and connected vehicles. The system was designed to handle enormous volumes of data in real-time, ensuring availability, durability, and speed, while retaining compatibility with Tesla's existing PromQL query language and tools like Grafana. ClickHouse was chosen for its exceptional performance, enabling Comet to ingest tens of millions of rows per second and scale far beyond Tesla's requirements, with a successful test reaching over one quadrillion rows. Comet's architecture includes an ingest pipeline using Kafka and OpenTelemetry, and a transpiler that converts PromQL into ClickHouse SQL, allowing engineers to maintain their workflows seamlessly. With Comet functioning smoothly, Tesla is exploring additional capabilities like distributed tracing and considering open-sourcing the platform for broader use.

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