Mainframe VSAM Introduction, Features, Advantages, Disadvantages IBM
An ACCESS METHOD is a component of the operating system.
It is an interface between the application program and the physical operation of storage devices.
VSAM (Virtual Storage Access Method) is a high-performance access method used in mainframe operating systems like OS/VS1, MVS, MVS/XA, DOS/VS etc.
Why do we name it name Virtual Storage Access Method?
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