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(IOspersecond)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。
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 imp...
出处
《计算机应用》
CSCD
北大核心
2009年第2期421-423,共3页
journal of Computer Applications
关键词
独立磁盘冗余阵列技术
条纹
IOPS
粗粒度
Redundant Arrays of Independent Disks（RAID）
stripe
IOs PerSecond（IOPS）
thick granularity
