Modern external memory is represented by several device classes. At present, HDD, SATA SSD and NVMe SSD are widely used. Recently ultra-low latency SSD such as Intel Optane became available on the market. Each of these types exhibits it's own pattern for throughput, latency and parallelism. To achieve the highest performance one has to pick an appropriate I/O interface provided by the operating system. In this work we present a detailed overview and evaluation of modern storage reading performance with regard to available Linux synchronous and asynchronous interfaces. While throughout this work we aim for the highest throughput we also measure latency and CPU usage. We provide this report in hope the detailed results could be interesting to both researchers and practitioners.

中文翻译：

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从外部存储器读取

现代外部存储器由几种设备类别表示。目前，HDD，SATA SSD和NVMe SSD被广泛使用。最近，超低延迟SSD（例如Intel Optane）开始投放市场。这些类型中的每一种都表现出自己的吞吐量，延迟和并行性模式。为了获得最高的性能，必须选择操作系统提供的适当的I / O接口。在这项工作中，我们提供了有关可用Linux同步和异步接口的现代存储读取性能的详细概述和评估。在整个工作中，我们追求最高的吞吐量，同时也测量延迟和CPU使用率。我们提供此报告，希望详细的结果对研究人员和从业人员都有意义。