【摘要】 设计一个实用的分布式多媒体服务系统,存储子系统是其中的一个研究重点。根据多媒体系统的存储特点,从全新的视角提出一种存储子系统设计方案——基于对象的多媒体存储系统(Multimedia Object-based Storage System,MOSS),并分析了MOSS的系统架构和工作流程。与传统的多媒体存储技术相比,对象存储不仅能有效地改善系统I/O性能,还具有较好的安全性。以对象存储原型系统为基础,讨论了热点对象文件的分布和均匀分块优化策略。通过建立与系统相对应的数学模型,对数传率、I/O请求丢失率等性能指标作了定性分析。该研究工作对消除多媒体服务系统I/O瓶颈、进行存储子系统设计具有实际的指导意义。更多还原

【Abstract】 Storage subsystem is one of the pivots to design an applied distributed multimedia system.This paper set up an object-based distributed multimedia storage system and discussed a optimization storage policy about the hot object file.Comparing with the traditional network storage technology,the object-based distributed multimedia storage system is not only able to improve the I/O performance of system,but also make the system more safe.By setting up the mathematical model corresponding to the system,this paper qualitatively examined some performance classes such as the loss rate of program access etc.This research is significant to remove the I/O bottleneck and design the distributed multimedia storage subsystem.更多还原