研究多用户读写流的特性是存储性能研究的重要课题,尤其是IP-SAN使得共享SAN的用户数大大增加.首次理论分析了多IO流的综合特性.考察了多IO流在访问特性和到达特性上的相互影响.重点分析了由于IO流访问的局部性与多IO流的交叉到达而大大增加了的系统寻址动作.这些寻址动作影响着多IO流请求的服务时间,以及设备的整体吞吐量.同时,还开发了一个配置灵活的负载模拟器IOsim,验证了它的有效性和精确性.利用IOsim验证了多IO流特性的理论分析.模拟试验的结果证明了理论分析的正确性.使用提出的理论分析方法能够有效预测并判断多IO流并发访问的各种综合特性以及性能变化趋势.最后描述了未来的工作.%Analyzing integrated workload characteristics of multi-streams on storage systems is important for evaluating storage performance. For example, the number of users sharing SAN storage becomes greater in IP-SAN than before. The integrated workload characteristics of multi-streams in theory for the first time is analyzed , including mutual influence between these various streams in access pattern and arrival pattern. Especially seeking be also have investigated address that effects service time of IO requests and throughput of storage system because of IO stream accessing locality and multi-streams' staggered accessing. A workload simulator named Iosim been also have implemented that is configurable flexibly, and validating its accuracy and validity. Then using Iosim, the multi-streams' characteristics obtained from theory analyzing and simulating to prove that the theory analyzing accords with simulation very well is compared. So the set of formulabe can used to predict and estimate multi-streams' various characteristics and the change trend of storage system performance as IO streams change.
展开▼
