Evaluation of disk-level workloads at different time-scales
Evaluation of disk-level workloads at different time-scales
复制标题
不同时间尺度下磁盘级工作负载的评估
DOI：
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发表时间：
2009
期刊：
影响因子：
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通讯作者：
E. Riedel
中科院分区：
文献类型：
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作者：
Alma Riska;E. Riedel
在本文中，我们描述了从企业系统收集的三组不同的磁盘级跟踪。数据集在记录信息的粒度上有所不同，因此称为毫秒轨迹、小时轨迹和寿命轨迹。我们分析随时间推移以及整个驱动器系列的磁盘级利用率、空闲可用性、读写流量的动态变化。我们的评估证实，磁盘驱动器的利用率处于中等水平，并经历了长时间的空闲。在评估的所有时间范围内，到达磁盘的工作负载都是突发的。此外，同一系列的驱动器之间也存在差异，其中一部分驱动器一次可充分利用数小时的可用磁盘带宽。
In this paper, we characterize three different sets of disk-level traces collected from enterprise systems. The data sets differ in the granularity of the recorded information and are called accordingly the Millisecond, the Hour, and the Lifetime traces. We analyze the disk-level utilization, the availability of idleness, the dynamics of the read and write traffic, over time and across an entire drive family. Our evaluation confirms that disk drives operate in moderate utilization and experience long stretches of idleness. The workload arriving at the disk is bursty across all time scales evaluated. Also, there is variability across drives of the same family, with a portion of them fully utilizing the available disk bandwidth for hours at a time.