OS 390 MVS ESA Fundamentals of VSAM Part I 
...epts needed to design, or code, applications that use the
Virtual Access Storage Method (
VSAM). It begins with an overview of VSAM, describes what VSAM does for application programs that request its services, the four types of VSAM datasets, followed by a detailed explanation of the VSAM entry-sequenced dataset. The course then examines the physical organization of a
VSAM ESDS, including a
more...