As one of the workload characteristics, the anomaly behaviors in real workload have been recognized as a critical requirement for file system design. In this paper, a set of traces collected from typically realistic file system have been analyzed. The correlation study of I/O request inter-arrival times shows that it is necessary to examine the self-similarity in file system workload. Then the phenomenon of self-similarity which had been initially observed in network and disk I/O workload has also been visually and statistically observed in file system workload. In addition, we implement an I/O series generator in which the inputs are the measured properties of the available trace data. Experimental results show that this model can accurately emulate the complex access arrival behaviors of real file systems, particularly the heavy-tail characteristics.

中文翻译：

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代表性文件系统工作负载中的自相似性：分析和建模

作为工作负载特征之一，实际工作负载中的异常行为已被公认为文件系统设计的关键要求。在本文中，分析了从典型的现实文件系统中收集的一组痕迹。I/O 请求到达时间的相关性研究表明，有必要检查文件系统工作负载的自相似性。然后，最初在网络和磁盘 I/O 工作负载中观察到的自相似现象在文件系统工作负载中也得到了直观和统计的观察。此外，我们实现了一个 I/O 系列生成器，其中输入是可用跟踪数据的测量属性。实验结果表明，该模型可以准确模拟真实文件系统复杂的访问到达行为，