PowerMorph: QoS-Aware Server Power Reshaping for Data Center Regulation Service
PowerMorph: QoS-Aware Server Power Reshaping for Data Center Regulation Service
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DOI：
10.1145/3524129
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发表时间：
2022-03
期刊：
影响因子：
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通讯作者：
Ali Jahanshahi;N. Yu;Daniel Wong
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文献类型：
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作者：
Ali Jahanshahi;N. Yu;Daniel Wong
可再生能源在电网中的应用对电网运行频率的调节带来了稳定性挑战。因此，电网运营商要求终端用户客户（如数据中心）提供频率调节服务，以根据电网的需求动态调整其能耗，从而帮助平衡电网的稳定性。随着可再生能源的普及，频率调节服务的平均奖励价格已经远远高于电力成本。因此，数据中心提供频率调节服务具有很大的成本激励。许多现有的调制数据中心功率的技术会导致显著的性能下降或提供少量的频率调节。我们提出了一个紧密的qos感知数据中心电源重塑框架PowerMorph，它使商品服务器能够提供实用的频率调节服务。PowerMorph背后的关键是使用“补充工作负载”作为调节服务器功率的额外旋涡，它提供高供应容量，同时满足延迟关键工作负载的严格QoS约束。在一般情况下，我们可以实现高达58%的TCO改进，在某些情况下甚至可以完全消除数据中心的电费并提供净利润。
Adoption of renewable energy in power grids introduces stability challenges in regulating the operation frequency of the electricity grid. Thus, electrical grid operators call for provisioning of frequency regulation services from end-user customers, such as data centers, to help balance the power grid’s stability by dynamically adjusting their energy consumption based on the power grid’s need. As renewable energy adoption grows, the average reward price of frequency regulation services has become much higher than that of the electricity cost. Therefore, there is a great cost incentive for data centers to provide frequency regulation service. Many existing techniques modulating data center power result in significant performance slowdown or provide a low amount of frequency regulation provision. We present PowerMorph, a tight QoS-aware data center power-reshaping framework, which enables commodity servers to provide practical frequency regulation service. The key behind PowerMorph is using “complementary workload” as an additional knob to modulate server power, which provides high provision capacity while satisfying tight QoS constraints of latency-critical workloads. We achieve up to 58% improvement to TCO under common conditions, and in certain cases can even completely eliminate the data center electricity bill and provide a net profit.