在虚拟存储系统中，实际存储器的大小与虚拟存储器的大小之比。
In virtual storage systems, the ratio of the size of real storage to the size of virtual storage.
在虚拟存储系统中，一个固定长度的连续虚拟地址块，在分页操作过程中它作为一个单位在内存和磁盘之间来回复制。
In a virtual storage system, a fixed-length block of contiguous virtual addresses copied as a unit from memory to disk and back during paging operations.
在集群环境下，将分布式的外设构成一种动态虚拟存储系统能够较好地解决这个问题。
To solve the problem, it is a good idea to construct the distributed disks in cluster system into a DVDA(dynamic virtual parallel disk array).
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