Multi-RAID Queueing Model with Zoned Disks
Multi-RAID Queueing Model with Zoned Disks
复制标题
具有分区磁盘的多 RAID 队列模型
DOI：
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发表时间：
2007
期刊：
影响因子：
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通讯作者：
Peter Harrison
中科院分区：
文献类型：
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作者：
S. Zertal;Peter Harrison
使用精细、准确的访问时间函数，为在现代分区磁盘上实现的多RAID存储系统开发了一个排队模型。它是之前利用M/G/1队列的Fork-Join组成的分析模型的扩展，它直接根据模型组件的概率分布或矩（例如查找时间、旋转延迟和数据传输时间）来描述分区。这些量直接使用硬件的操作原理来计算。这与以前分区磁盘模型中通过模拟和理论边界估计它们的方法不同。由此产生的multiRAID模型原来是准确的，当它的性能预测，其特征在于在这里的平均值的延迟和响应时间，与模拟相比，也可扩展的，不仅为分区的技术，但也为备用的。关键词：Multi-RAID，分区磁盘，Fork-Join，M/G/1队列，I/O建模，仿真。
A queueing model is developed for a multiRAID storage system implemented on modern zoned disks, using fine, accurate access time functions. An extension of a previous analytical model that utilizes Fork-Join composition of M/G/1 queues, it describes zoning directly in terms of the probability distributions or moments of the model’s components, such as seek time, rotational latency and data transfer time. These quantities are calculated directly using the principles of operation of the hardware. This is in contrast to estimating them from simulations and theoretical bounds, as in previous zoned disk models. The resulting multiRAID model turns out to be accurate, when its performance predictions, characterized here by the mean of queueing and response times, are compared with simulation, and also scalable; not only for the zoned technology but also for alternate ones. keywords : Multi-RAID, Zoned disks, Fork-Join, M/G/1 queues, I/O modelling, Simulation.