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VSAM essentials workshop

This hands-on two-day course describes and explains the access method concepts in MVS and the structure and design of VSAM files. It teaches how to create VSAM files using the utility Access Method Services (AMS), both from a functional as well as a performance point of view.
Additionally, it provides the Systems Programmer and Operational Analyst with information on the structure of ICF catalogs and the related VTOC and Index VTOC.
Online exercises provide experience in creating, accessing and managing VSAM files. Attendees will create and use clusters, alternate indexes and paths.

On successful completion of this course you will be able to:

  • describe and explain the concepts of the z/OS access methods
  • analyse the structure of the RRDS, ESDS, KSDS and LDS datasets
  • use the Access Method Services utility program IDCAMS to define, load, backup, monitor and manipulate VSAM datasets with particular emphasis on the KSDS file type
  • develop guidelines for optimised allocation of VSAM files for use at their installation.

Schedule a training?

Delivered as a live, interactive online training

DEMANDER FORMATION EN ENTREPRISE

 

Calendrier publique des formations
dateduréelang.lieuprix 
16 juin2Eweb based 1750 EUR (excl. TVA)
INFO SESSION ET INSCRIPTION

Intended for

All programmers, systems programmers, operators and operations analysts.

Background

Familiarity with basic z/OS principles and a working knowledge of TSO/ISPF and JCL.

You can test yourself to see if you have enough background by filling out the online selftest "ISPF" and the online selftest "JCL".

Main topics

  • VSAM Overview
    • MVS and I/O processing
    • The access methods
    • The IOS Drivers
    • The I/O Supervisor (IOS)
    • The Back-End process
    • MVS access methods
    • Queued Sequential Access Method
    • Basic Direct Access Method
    • Basic Partitioned Access Method
    • PDSE processing
    • And now to VSAM
    • VSAM features
    • Entry Sequenced Data Set (ESDS)
    • Key Sequenced Data Set (KSDS)
    • Relative Record Data Set (RRDS)
    • Catalog concepts
    • ICF catalogs and VTOCS
    • ICF catalogs (BCS)
    • VSAM Volume Data Set (VVDS)
    • Cluster Catalog (BCS) entries
    • Alternate indexes and paths
    • VSAM overview - exercises
  • VSAM Dataset Structure
    • Control Areas
    • Control Intervals
    • Control Interval structure
    • CI structure of fixed length records
    • CI structure of variable length records
    • Control Area structure
    • Relative Byte Address (RBA)
    • Spanned records
    • Storage of data on DASD volumes
    • Entry Sequenced
    • Key Sequenced
    • Index component
    • Free space
    • RRDS characteristics
    • KSDS processing example
    • The Control Interval is rewritten
    • Deleting a record
    • Record insertion
    • CI split
    • CA split
    • VSAM dataset structure - exercises
  • Using Access Method Services
    • Access Method Services (AMS)
    • AMS command format
    • Example - define an ESDS
    • Modal commands
    • Cancelling IDCAMS steps
    • Using the ELSE and SET commands
    • Comments
    • Error messages
    • Dataset already exists
  • Defining VSAM Datasets
    • IDCAMS commands
    • DEFINE command - main parameters
    • Defining a cluster
    • Cluster sub-parameters
    • IDCAMS required parameters
    • Space allocation and reuse
    • SHAREOPTIONs (x region, y system)
    • Control Interval Size
    • More IDCAMS parameters
    • DATA and INDEX sub-parameters
    • Defining an ESDS
    • Defining an RRDS
    • Defining a KSDS
    • FREESPACE
    • DELETE MASK | NOMASK
  • Listing Catalog Information
    • Listing catalog information - LISTCAT
    • Catalog information
    • LISTCAT
    • LISTCAT parameters
    • LISTCAT examples
    • LISTCAT output
  • VSAM Dataset Management
    • VSAM data management commands
    • Loading datasets
    • REPRO
    • REPRO parameters
    • Copy ESDS to KSDS
    • Copy partial RRDS to RRDS
    • Copy keyrange from KSDS to KSDS
    • Merge two KSDSs
    • Copy KSDS to tape
    • Printing datasets
    • PRINT parameters
    • PRINT examples
    • PRINT output example - CHARACTER
    • Altering catalog entries
    • Deleting catalog entries
    • DELETE parameters
    • DELETE examples
  • Alternate Indexes
    • Why use alternate indexes?
    • Alternate index design
    • Alternate index record
    • Defining a route to the base cluster
    • Update of an alternate index
    • Defining an alternate index
    • Alternate index sub-parameters
    • Alternate index (SMS)
    • AIX record size calculation
    • Building an alternate index
    • Defining a Path
    • Printing a base KSDS
    • Printing via an alternate indexes using PATH
  • VSAM Data Integrity
    • Data integrity
    • Disposition processing
    • VSAM SHAREOPTIONS
    • Cross system sharing
    • VSAM back-up options
    • The EXPORT command
    • VSAM recovery options
    • The IMPORT command

Training method

Live instructor-led training, with plenty of opportunities for hands-on exercises and discussion.
This course is also available for exclusive, one-company presentations and for live presentation over the Internet, via the Virtual Classroom Environment service.

Certificate

At the end of the session, the participant receives a 'Certificate of Completion'.

Duration

2 days.

Course leader

RSM Technology.


INFO SESSION ET INSCRIPTION