Answer: Throughput, End to End Latency

Big data systems, particularly those involving data processing pipelines, prioritize throughput and end-to-end latency as key Service Level Indicators (SLIs). These metrics are crucial for assessing the performance and efficiency of such systems. For more insights, refer to [Google's Site Reliability Engineering book](https://landing.google.com/sre/sre-book/chapters/service-level-objectives/).

Author: LeetQuiz Editorial Team