Answer: Throughput, End to End Latency

Big data systems, particularly data processing pipelines, prioritize throughput and end-to-end latency as key performance metrics. These metrics help in assessing the system's efficiency and responsiveness. For more insights, refer to [Google's SRE book](https://landing.google.com/sre/sre-book/chapters/service-level-objectives/).

Author: LeetQuiz Editorial Team