The term Virtual Storage Access Method (VSAM) applies to both a data set type and the access method used to manage various user data types.

VSAM was introduced in the 1970s when IBM announced virtual storage operating systems (DOS/VS, OS/VS1 and OS/VS2) for its new System/370 series, as successors of the DOS/360 …

VSAM is abbreviated as Virtual Storage Access Method. VSAM is high performance access method and data set organization, which organizes and maintains data in a catalog structure.

This tutorial is designed for software programmers with a need to understand the VSAM concepts starting from scratch. This tutorial will give you enough understanding on VSAM from where …

VSAM is the short form of Virtual Storage Access Method. VSAM was introduced in the early 1970s by IBM with three dataset organizations - sequential, indexed, and direct access.

If you want to update a particular record in the file or you want to delete your files as a normal activity, then you choose VSAM (Virtual Storage Access Method) file over sequential file …

VSAM (Virtual Storage Access Method) is a high-performance access method for datasets on z/OS systems. Developed by IBM, VSAM provides efficient, flexible methods for organizing …

You use the virtual storage access method (VSAM) to organize data and maintain information about that data in a catalog. Perform VSAM programming using access method services …

Jul 8, 2024 · VSAM is an access method for IBM's mainframe operating system z/OS. It organizes records in a file in physical sequence and has four data sets.

While developing VSAM, the designing team defined some basic important concepts and terms. Before learning more about VSAM, knowing about these concepts and terms will be helpful.