Ultra-Low Latency SSDs' Impact on Overall Energy Efficiency
Ultra-Low Latency SSDs' Impact on Overall Energy Efficiency
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发表时间：
2020
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通讯作者：
B. Harris;Nihat Altiparmak
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作者：
B. Harris;Nihat Altiparmak
最近的技术进步已经实现了新一代超低延迟（Ultra-Low Latency，简称SSD），它模糊了主存储设备和辅助存储设备之间的性能差距。然而，它们的功耗特性在很大程度上是未知的。此外，块设备中的可编程性能预计会对操作系统组件施加额外压力，从而显著影响整个系统的能源效率。在这项工作中，我们使用真实的闪存存储设备Optane SSD、功率计和各种IO工作负载行为来实证研究整体能效。我们通过列出与空闲与活动行为、读与写行为、能源比例、对系统软件的影响以及对整体能源效率的影响相关的几个关键观察结果来进行比较分析。据我们所知，这是第一个发表的关于SSD对系统整体功耗影响的研究，这有望导致未来的节能设计。
Recent technological advancements have enabled a generation of Ultra-Low Latency (ULL) SSDs that blurs the performance gap between primary and secondary storage devices. However, their power consumption characteristics are largely unknown. In addition, ULL performance in a block device is expected to put extra pressure on operating system components, significantly affecting energy efficiency of the entire system. In this work, we empirically study overall energy efficiency using a real ULL storage device, Optane SSD , a power meter, and a wide range of IO workload behaviors. We present a comparative analysis by laying out several critical observations related to idle vs. active behavior, read vs. write behavior, energy proportionality, impact on system software, as well as impact on overall energy efficiency. To the best of our knowledge, this is the first published study of a ULL SSD’s impact on the system’s overall power consumption, which can hopefully lead to future energy-efficient designs.