Posted On: Mar 28, 2020
VSAM (Virtual Storage Access Method) is a file storage access method that is used in MVS, ZOS and OS/390 operating systems. It is a high-performance access method that is used for organizing data in the form of files in Mainframes.
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There are three types of datasets access methods used by VSAM...
Every file in VSAM has two objects which define this storage system...
CI is represented in the unit of 1/0..