VSAM Fundamentals

Arcis Services
Brussels, Belgium

Course Format: Classroom | E-learning | Virtual Class | Online/Live | On-site/In-house | Blended | Self-paced
Teacher/Instructor: Michel Castelein

Course Description:

'' Course objectives
The students will learn the different Virtual Storage Access Method (VSAM) data set organisations and how to define them for optimum performance.
Making use of practical exercises the students will learn how to invoke IDCAMS services and how to code COBOL VSAM related I/O statements.
The students will learn how to interpret LISTCAT outputs and to identify the necessary tuning actions.

Audience
System programmers, operation analysts and application developers.

Prerequisites
You need a working knowledge of the OS/390 or z/OS environment.

Course contents
Basic I/O concepts
block, logical record
sequential, indexed and direct data processing
access methods
DASD: track, cylinder, access time, ...
Non-VSAM data set organizations and access methods
PS, PDS, IS, DA, and PDSE
BSAM, QSAM, BPAM, ISAM, and BDAM
VSAM record formats
fixed, variable, and spanned
VSAM data set organizations
ESDS, fixed-length RRDS, variable-length RRDS, KSDS, and LDS
VSAM internal organization
CI, CI control information, CA, CI split, CA split, free space, ...
IDCAMS commands
LISTCAT, DEFINE CLUSTER, REPRO, PRINT, DELETE, ALTER, VERIFY, EXAMINE, ...
Defining a VSAM cluster
Loading a VSAM cluster
Interpreting the LISTCAT output
Using COBOL to process ESDS, RRDS, KSDS, KSDS with alternate keys
File status and VSAM codes
Optimizing VSAM performance
space allocation, CI and CA size, free space, index options (IMBED and REPLICATE), buffering, ...
Alternate Indexes, Paths
DEFINE AIX, DEFINE PATH, BLDINDEX commands
Concurrent processing
NSR, LSR and GSR buffering
BLSR subsystem
Hiperbatch
VSAM and SMS
Theoretical and practical exercices ...''

Elements of this syllabus are subject to change.

Phone:+32 2 534 49 77

School Address/Venue(s):

Fontainasstraat 27

Jobs & Resumes: Brussels
Houses & Roommates: Brussels
Travel Agencies: Brussels

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