OS/390 MVS/ESA Fundamentals of VSAM Part II

This course explains how VSAM adds and deletes records to and from a KSDS. It describes how VSAM manages the space within the data components of the KSDS when it performs additions or deletions. It also covers the organization and function of an alternate index. It describes the role that catalogs play in maintaining and accessing VSAM datasets. It reviews the basic concepts of a catalog and shows how catalogs are used to locate and access a VSAM dataset. The course discusses master catalogs and user catalogs - their uses, similarities and differences. It also explains how to use IDCAMS to create a KSDS file statement that defines a VSAM file and how to process a KSDS file.

Fundamentals of VSAM Part II training covers such topics as:

Managing KSDS Storage
Free Space in KSDS
Control Interval and Control Area Splits
Free Space Efficiency Considerations
Dataset Reorganization
Free Space Assignment Guidelines
Alternate Indexes
An Alternate Index
Accessing a Base Cluster
Alternate Index Applications
The Role of Catalogs with VSAM Datasets
The Catalog Environment
System Datasets Used to Support Cataloging
Identifying the Catalog to a Dataset
Practical VSAM Applications
VSAM Applications

Learn exactly what you need to know about Free Space in KSDS, and the physical organization of an alternate index. You will be able to describe the functions of catalogs, identify the system datasets used to support cataloging and describe the information stored in each.

OS/390 MVS/ESA Fundamentals of VSAM Part II
Everything Programming

Description
This course explains how VSAM adds and deletes records to and from a KSDS. It describes how
VSAM manages the space within the data components of the KSDS when it performs additions or
deletions. Also covered is the organization and function of an alternate index, how and when an
alternate index can be used, and how an alternate index relates to an existing ESDS or KSDS. It
describes the role that catalogs play in maintaining and accessing VSAM datasets. It reviews the
basic concepts of a catalog and shows how catalogs are used to locate and access a VSAM
dataset. The course discusses master catalogs and user catalogs - their uses, similarities and
differences, examines the system datasets that are used to support the catalog facility and
describes various ways to identify the catalog in which a dataset is described. It also explains
how to use IDCAMS to create a KSDS file statement that defines a VSAM file and how to process
a KSDS file.
Audience
This course is designed for operators with previous JES2 experience.
Prerequisites
Prior JES2 experience
Course Duration
» 5 hours
Topics Include
Free Space Efficiency Considerations
Dataset Reorganization
Free Space Assignment Guidelines
Alternate Indexes
An Alternate Index
Accessing a Base Cluster
Alternate Index Applications
The Role of Catalogs with VSAM Datasets
The Catalog Environment
System Datasets Used to Support Cataloging
Identifying the Catalog to a Dataset
Practical VSAM Applications
VSAM Applications
Everything Courseware
OS/390 MVS/ESA Fundamentals of VSAM Part II
Objectives
» identify three ways that free space comes to exist in the data component of a KSDS
» demonstrate how VSAM processes a KSDS when asked to add or delete a record randomly
» describe the processing performed by VSAM during a control interval split
» describe the processing performed by VSAM during a control area split
» describe the effects of too much and too little free space
» determine whether the dataset should be defined with no free space, a minimal amount
of free space, or a large amount of free space, given the description of a KSDS application
» illustrate the physical organization of an alternate index
» identify the different ways that a base cluster can be accessed through an alternate index
» identify appropriate applications for an alternate index
» describe the functions of catalogs
» list the similarities and differences between a master catalog and describe the information
stored in each
» identify the system datasets used to support cataloging and describe the information
stored in each
» identify the different ways in which the catalog for a dataset can be identified
» list the steps the operating system follows and the catalogs it searches when trying
to locate a dataset
» explain how to use IDCAMS to create a KSDS file statement that defines a VSAM file
» explain how to process a KSDS file statement using a program written in a language such as
OS/VS COBOL or COBOL II
» describe how VSAM processes an alternate index

System Requirements

» Pentium class computer
» 200 MHz processor (266 MHz recommended)
» 32 MB RAM (64 MB recommended)
» CD-ROM drive
» Any one of Windows 95, Windows 98, Windows Me, Windows NT 4.0, or Windows
2000 (both Windows NT 4.0 and Windows 2000 require at least 64 MB RAM)
» SVGA monitor capable of 16-bit color and 800 x 600 screen resolution
» Sound card with speakers or headphones (optional)

Features
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