数据网格中存储I/O的SPN建模与性能评价

SPN modeling and performance evaluation of storage I/O in data grid

针对数据网格中存储资源的结构、协议和I/O模式的复杂性问题,分析了存储网络的并行存储I/O请求模型,采用随机Petri网(SPN)建立了SPN并行存储I/O传输的数学模型,描述了系统请求响应时间与系统负载、网络带宽和节点处理能力之间的关系,然后通过排队论进行了并行I/O的性能分析,最后归纳了影响存储网络系统I/O性能的因素,在并行策略和数据组织与分配等方面提出了提高整体存储性能的改进方法.为改进提高数据网格的整体存储I/O性能提供了有效的建模方法和具体的理论依据.

To solve the complicated problems of architecture,protocol and I/O patterns of storage resource in data grid,the parallel storage I/O mode of storage network is analyzed.A new parallel storage I/O SPN model based stochastic Petri network(SPN) is proposed.The relations between system response time,system loads,network bandwidth and the capability of nodes are thoroughly studied.Then,the queuing theory gives the performance evaluation of parallel I/O.Also,the effect factors of system performance are concluded.Moreover,the new parallel strategies and data assignment policies are adopted to increase the storage performance.This model can provide effective theoretics and modeling methodology to improve the storage I/O performance for data grid.