VSAM is a kind of file which use the virtual storage access method, it belongs the second phase of the development of data management technology. 利用此技术的数据文件称为VSAM文件,它属于数据管理技术发展的第二个阶段&文件系统。
This makes mainframe a mysterious thing. Virtual Storage Access Method(VSAM) ( VSAM ), being the most important file storage access method used in mainframe, performs well than any other access method. 大型机上重要的文件储存方法&虚拟存储读取技术(VSAM),不同于常规的文件组织方式和存取方法,有着一些突出的优点,因而在大型机上取得了广泛的应用。
VSAM ( virtual storage access method ) is a high performance access method in IBM operating system for direct access storage that runs in virtual storage and uses virtual storage to buffer input and output operations. 虚拟存贮存取方法VSAM是IBM大中型机器操作系统的组成部分,用于虚拟存贮环境中的直接存取存贮器及用虚拟存贮器作输入输出操作的缓冲。
The method adopts the mechanism of virtual data set to abstract the storage system aggregated in the Grid into a virtual unitary system, realizing the united view of grid data and the uniform data access method in one grid environment. 这种方法采用虚拟数据集的机制将汇聚在网格中的存储系统抽象成一个虚拟一体化系统,实现了网格数据的统一视图和一种网格环境中的数据统一访问方法。