March 2007
Beginner
526 pages
13h 53m
English
book
Introduction to the New Mainframe: z/VSE Basics
by Wolfgang Bosch, Hans Joachim Ebert, Helmut Hellner, G. M. (Jerry) Johnston, Wilhelm Mild, Ingolf Salm, Joerg Schmidbauer, Martin Walbruehl, Mike Ebbers
Content preview from Introduction to the New Mainframe: z/VSE Basics
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Chapter 5. Working with files 147
When you define a VSAM space on a volume, you set up a relationship between
that space and a catalog. The space is owned by the catalog. You can define
other spaces on that same volume or a different volume for the same catalog.
Master catalogs and user catalogs
A z/VSE system always has at least one master catalog. If a z/VSE system has a
single catalog, this catalog would be the master catalog and the location entries
for files would be stored in it. A single catalog, however, would be neither efficient
nor flexible, so a typical z/VSE system uses a master catalog and numerous user
catalogs connected to it. Every catalog exists on a single volume. It is
independent of other catalogs and exclusively controls ...
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I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.