| RAID小数据随机访问性能分析与优化 |
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| 引用本文： | 刘冬,王丽芳,蒋泽军,刘志强.RAID小数据随机访问性能分析与优化[J].计算机应用,2009,29(2):421-423. |
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| 作者姓名： | 刘冬 王丽芳 蒋泽军 刘志强 |
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| 作者单位： | 西北工业大学计算机学院 西北工业大学 陕西省西安市西北工业大学计算机学院 西北工业大学 |
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| 摘 要： | RAID采用条纹结构，使多块磁盘可并行访问，提高了带宽，适合于大块数据顺序访问，而对小块数据随机访问影响不大。针对Stripe条纹大小对RAID的读写性能进行分析，探讨多用户小数据访问模式下的IOPS(IOs per second)问题，提出粗粒度条纹布局模型。仿真实验表明：该模型的性能优于现有布局方式，显著提高小块数据随机访问性能。
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| 关 键 词： | 独立磁盘冗余阵列技术 条纹 IOPS 粗粒度 |
| 收稿时间： | 2008-08-07 |
| 修稿时间： | 2008-09-24 |
Analysis and optimization for RAID small data random access |
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| LIU Dong,WANG Li-fang,JIAGN Ze-jun,LIU Zhi-qiang.Analysis and optimization for RAID small data random access[J].journal of Computer Applications,2009,29(2):421-423. |
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| Authors: | LIU Dong WANG Li-fang JIAGN Ze-jun LIU Zhi-qiang |
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| Affiliation: | LIU Dong,WANG Li-fang,JIAGN Ze-jun,LIU Zhi-qiang School of Computer Science , Engineering,Northwestern Polytechnical University,Xi'an Shaanxi 710072,China |
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| Abstract: | In order to make multiple disks accessible parallelly, the stripe layout is adopted by RAID for high-bandwidth. The approach is appropriate for big sequential data access, but is not that effective for small data random access. This paper analyzed the I/O performance based on RAID Stripe size, explored the IOPS（IOs per second）of multiple user small data access, and proposed a new stripe layout architecture—Thick Granularity Model. The simulation indicates: the I/O performance of Thick Granularity Model has been improved，especially in small data random access. |
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| Keywords: | IOPS |
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