Audience
This course will interest programmers, computer operators, system analysts, system programmers, and all others involved in improving coding techniques and exploring JCL's features.
Prerequisites
Delegates should have a basic understanding of the operating environment and operating system functions, especially JCL. This can be gained by attending our z/OS Job Control Language (JCL) - Basic course.
Knowledge of TSO/ISPF is required for this course. This can be gained by attending our z/OS TSO/ISPF Workshop.
Duration
2 days. Hands on.
NOTE: This course can be combined with our z/OS Job Control Language (JCL) - Basic course to produce a comprehensive five day event. Please see z/OS Job Control Language (JCL) - Basic and Advanced, or contact us, for more information.
Course Objectives
This course provides an in-depth look at z/OS JCL. It explores Generation Data Groups, Conditional JCL, Procedures and the use of UNIX files before rounding off with an introduction to various utility programs. It contains 22 hands on exercises.
On completion of this course, delegates will be able to:
- Create and maintain a GDG.
- Exploit the use of Conditional JCL.
- Create in-stream procedures.
- Create catalogue procedures.
- Use symbolic parameters.
- Use procedure overrides.
- Access UNIX files via JCL.
- Choose an appropriate utility for a task.
Course Content
JCL Revision
Evolution of JCL
JCL syntax
Statement types
Operand types
JCL Error points
Comprehension quiz
Generation Data Groups
GDG Terminology:
• Absolute generations
• Relative generations
Creating generations
Retrieving generations
Building a base entry
Creating a GDS:
• Using a Model DSCB method
• Using the DATACLAS method
Listing GDG information
Altering the base entry
Re-run using Version Numbers
Deleting entries:
• IEFBR14 method
• IDCAMS method
Delete base and its associations
Comprehension questionnaire
5 practical exercises
Conditional JCL
Information available at step end
IF / THEN / ELSE construct
Relational expressions
The NOT operator
Order of precedence
Eligible statements within Conditional JCL
Ineligible statements within Conditional JCL
What is executed unconditionally?
Example without an ELSE
Example with an ELSE
Nested IF statements
Comprehension questionnaire
3 practical exercises
JCL Procedures
Procedure definition:
• Locating a procedure
• Default libraries (JES2 and JES3)
• User libraries (JES2 and JES3)
• JCLLIB
• In-stream
• Search order
Procedure construction:
• Naming
• Exclusions
• Invocation
Procedure statement overrides and additions:
• EXEC statements
• DD statements
• OUTPUT statements
Symbolic parameters:
• Identification
• Assigning default values
• Overriding default values
• The SET statement
INCLUDE statement
Nested procedures
Comprehension questionnaire
8 practical exercises
Accessing UNIX files
File systems HFS vs. ZFS
Security
PATH=
PATHDISP=
PATHMODE=
PATHOPTS=
Creating a new file
Overwriting an existing file
BPXBATCH Utility
Deleting a UNIX file
Re-run-able jobs
Reading an existing file
Obtaining a list of files
6 practical exercises
Using Utilities
Review of why a utility might be used, discussions on:
• Allocating data space
• Backing up a data set
• Changing a data set's LRECL
• Compressing a PDS
• Copying a data set
• Deleting a data set
• Listing the catalogue
• Listing a PDS directory
• Printing a data set
• Renaming a data set
• Restoring a data set
• Segmenting a data set
ADRDSSU
IDCAMS
IEBCOPY
IEBDG
IEBEDIT
IEBGENER
IEBPTPCH
IEBUPDTE
IEFBR14
IKJEFT01 – (Batch TSO)
Comprehension quiz
4 practical exercises