VSAM

File Format
Name	VSAM
Ontology	Electronic File Formats Filesystem VSAM

VSAM (Virtual Storage Access Method) is a filesystem technology used in IBM mainframes.

VSAM is not a filesystem per se, it is a layer which sits on top of the IBM VTOC filesystem.

JCL (Job Control Language) is used to control access to such systems.

Links

• Wikipedia article
• VSAM tutorial (actually a bunch of code samples)
• Defining a Data Set with JCL
• VSAM demystified