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• W4251967167 abstract "Evaluating the comprehensive performance of a warehouse-scale computer (WSC) has been a long-standing challenge. Traditional load-testing benchmarks become ineffective because they cannot accurately reproduce the behavior of thousands of distinct jobs co-located on a WSC. We therefore evaluate WSCs using actual job behaviors in live production environments. From our experience of developing multiple generations of WSCs, we identify two major challenges of this approach: 1) the lack of a holistic metric that incorporates thousands of jobs and summarizes the performance, and 2) the high costs and risks of conducting an evaluation in a live environment. To address these challenges, we propose WSMeter, a cost-effective methodology to accurately evaluate a WSC's performance using a live production environment. We first define a new metric which accurately represents a WSC's overall performance, taking a wide variety of unevenly distributed jobs into account. We then propose a model to statistically embrace the performance variance inherent in WSCs, to conduct an evaluation with minimal costs and risks. We present three real-world use cases to prove the effectiveness of WSMeter. In the first two cases, WSMeter accurately discerns 7% and 1% performance improvements from WSC upgrades using only 0.9% and 6.6% of the machines in the WSCs, respectively. We emphasize that naive statistical comparisons incur much higher evaluation costs (> 4 times) and sometimes even fail to distinguish subtle differences. The third case shows that a cloud customer hosting two services on our WSC quantifies the performance benefits of software optimization (+9.3%) with minimal overheads (2.3% of the service capacity)." @default.
• W4251967167 created "2022-05-12" @default.
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• W4251967167 date "2018-03-19" @default.
• W4251967167 modified "2023-10-16" @default.
• W4251967167 title "WSMeter" @default.
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• W4251967167 doi "https://doi.org/10.1145/3296957.3173196" @default.
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