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术语 hierarchical file
释义 hierarchical file
分级文件;[阶组档案]
A file system or mass storage system in which elapsed processing time is balanced against the unit cost of memories of varying access speeds. Frequently used items may be kept in main memory itself (expensive), less frequently used items on disks (slower but less expensive), and infrequently used items on data cell or high-speed, highdensity tape drive (slowest and least expensive).
在处理时间和不同速度存储器单位价格之间加以折衷而设计的一种文件系统或海量信息 系统,在该系统中,常用数据项放在内存里(昂贵),较少用到的数据项放在磁盘里(较慢但 较便宜),而很少用到的数据项则放在数据单元里或高速度、高密度的磁带机中(最慢但 最便宜)。
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