计算机科学 ›› 2017, Vol. 44 ›› Issue (2): 228-234.doi: 10.11896/j.issn.1002-137X.2017.02.037
杨良怀,万凯明,范玉雷
YANG Liang-huai, WAN Kai-ming and FAN Yu-lei
摘要： 固态盘具有低访问延迟、抗震性、内部并行性等诸多优良特性,已被广泛使用。如何利用固态盘提高系统性能是当前研究议题之一。首先通过一系列不同读写比例的负载实验来探索固态盘的特性,发现在较大I/O请求粒度场景下,较高的读请求比例有利于提升各类固态盘的吞吐量。基于实验结论,提出了一种I/O只读负载分离方法RODI,通过合理放置只读数据来分离只读负载到合适的固态盘上,以提升异构多盘阵列整体的吞吐量。大量实验表明,在较大I/O粒度的异构多盘环境中,相比传统的RAID技术, RODI方法对于改善多盘总体吞吐量更具优势。
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