z/OS Diagnostics and Debugging

Mainframe Training Overview

This class is a lecture-workshop for experienced systems programmers with a focus on using the tools available to narrow down the scope of system problems, identify failed components and debug operating systems problems. Emphasis will be on problem diagnosis and "hands-on" exercises using the available tools.

Mainframe Training Audience

This class is intended for experienced systems programmers with a good understanding of TSO/E, JCL and z/OS functions.

Mainframe Training Course duration

5 days

Mainframe Training Course outline

Problem types and their diagnosis

  Abends

System "hangs" or wait states

System or component loops

Incorrect output or corrupt operation problems

Performance/availability problems

Component identification and isolation

Diagnostic tools and their usage

  Abends

Tracing mechanisms

LOGREC

Service Aids

IPCS

System failure versus recoverable scenarios

Session Content

I. Problem diagnosis overview

  a. Types of problems

b. Component failure isolation approaches

c. Assessment

d. Specifying symptoms

II. IPCS

  a. Verbs and functions

b. CLISTS and customization options

III. Abends and dump processing

  a. Dump types
  1. SVC Dumps
  2. Stand-alone dumps and their use
  3. Abend dumps
  4. SNAP dumps
  5. Transaction dumps
b. System and component reference data

IV. SLIP Traps

V. Tracing tools and procedures

  a. System trace (ST)

b. Master trace

c. Generalized tracing facility (GTF)

d. Component trace (CT)

e. Transaction trace

f. GETMAIN, FREEMAIN, STORAGE trace

VI. Service Aids

  a. SPZAP

b. AMBLIST

VII. Additional diagnostic data

  a. LOGREC data

VIII. Assessing system recovery options

  a. Spin loops

b. Performance/availability problems


Wintrac Inc.
16523 SW McGwire Ct.
Beaverton OR 97007
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