计算机虚拟存储体系结构中磁盘文件访问存在局部性，大量访问集中在少数文件上。
Disk file accesses are localized just like RAM access localization in the virtual memory architecture. Most file accesses localize few files.
IDS的基本体系结构包括三个主要组件：数据存储器、内存结构和后台处理器或虚拟处理器。
Basic IDS architecture has three major components; data storage, memory structure and background or virtual processors.
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