Doppler: understanding serverless query execution.

Analyzing and understanding query execution dynamics in distributed cloud-based databases is difficult and requires laborious system designs. Serverless query execution, with its massive amount of small, short-lived, and stateless query workers, is even more challenging. To meet this challenge and materialize the economic benefits of serverless computing, all system components have to be serverless themselves. We demonstrate Doppler, a serverless toolkit designed to trace serverless data processing systems with minimal performance and cost overhead and to provide a deep understanding of their query execution. We highlight Doppler's features and capabilities through a proof-of-concept implementation with the serverless data processing system Skyrise.