Course:  ZOSJS
Duration:  5 Days
Level:  I
Course Summary

This class provides students with the comprehensive practical knowledge, in the skills and tools, required to understand and work with the z/OS environment. The class provides the fundamental foundation of knowledge needed to support applications and components hosted on the z/OS platform. The class will also benefit students who work on other platforms that interact with z/OS.

Extensive hands on exercises allow the student to reinforce their understanding of the theoretical knowledge that is central to the class.

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Topics Covered In This Course

z/OS Overview

  • Explain the differences between z/OS base elements and optional features
  • Describe the types of services that z/OS provides
  • Identify the server solutions included in z/OS
  • Describe some of the benefits of having these solutions integrated in z/OS

Storage management

  • Explain z/OS virtual storage concepts
  • Describe the different common and private storage areas in an address space
  • Describe the virtual to real address translation process (DAT)
  • Describe the differences between address spaces, data spaces, and hiperspaces
  • Differentiate between paging and swapping
  • Describe the purpose of a coupling facility
  • Define the three types of coupling facility structures, LIST, LOCK and CACHE
  • Explain the purpose of Cross-system Extended Services (XES)

Managing work

  • Describe how z/OS tasks and service requests are created
  • List the program search order within z/OS
  • Explain how and why z/OS dispatches a task
  • Illustrate interrupt processing
  • Identify supervisor calls
  • Explain inter address space communication
  • Describe how z/OS serializes the usage of critical resources
  • Briefly describe UNIX System Services and file systems

I/O processing

  • Define the function of Central Storage, CPU, Channel Sub-System, Channel Path, Switch, Control Unit and I/O device
  • Describe the HCD process for defining an I/O configuration
  • Describe the flow of an I/O operation through the hardware and software components of a z/Series server

Data management

  • Describe the catalog process used to locate data sets
  • Describe the roles and interactions of the Volume Table Of Contents (VTOC), index VTOC, and VSAM Volume Data Set (VVDS) in managing the datasets and free space on a DASD volume
  • Understand the steps that z/OS uses to allocate data sets in both System Managed Storage (SMS) and non-SMS environments \
  • Understand the functions provided by the different DFSMS components

Job management and flow

  • State the purpose of JES2
  • State the purpose of the spool and checkpoint data sets
  • Understand the multi-access spool environment
  • Describe the methods used to establish a job in the system
  • Define job output class and output processing priority
  • Explain the purpose of the Subsystem Interface (SSI)

Initial program load (IPL) and system initialization

  • Explain the purpose of the system initialization
  • Define the role of the NUCLEUS, PARMLIB and other critical datasets in system initialization
  • Describe the purpose of the SYSRES and IODF volumes
  • Describe the purpose of some of the system address spaces created during the system initialization process

Recovery and Termination Management

  • Describe the purpose of the Recovery Termination Manager (RTM)
  • Describe the purpose of recovery management support
  • Describe the various problem analysis dumps and traces produced by z/OS and use the available analysis tools

Installing and configuring

  • Differentiate between the ServerPac and CBPDO deliverables
  • Describe a ServerPac installation of z/OS
  • Describe a CBPDO installation of z/OS
  • Describe z/OS Managed System Infrastructure for Set up (MSYS for set up)


  • Differentiate between VTAM/SNA and TCP/IP networking protocols
  • List some of the possibilities for interconnecting different network structures
  • Describe some of the characteristics of a VTAM/SNA network
  • Describe some of the characteristics of a TCP/IP network
  • Explain how Internet Protocol (IP) addresses are used
  • Recognize the TCP/IP applications provided by the z/OS Communications Server
  • Explain the purpose and function of the Open Systems Adapter (OSA)

Security in z/OS

  • Explain the authorized program facility APF
  • Explain the difference between authorization and authentication
  • Understand the role and structure of RACF
  • Describe a digital certificate from a Certificate Authority (CA), and its purpose
  • Describe the Lightweight Directory Access Protocol (LDAP)
  • Describe Network Authentication Services
What You Can Expect
  • Describe the system initialization processes of the z/OS operating system
  • State the differences between an address space, data space, and hiperspace
  • Describe the process of translating a virtual address to a real address
  • Explain the difference between paging and swapping
  • Describe the z/OS work units (TCB and SRB)
  • Describe z/OS dispatching, interrupt processing, supervisor calls, cross memory services, and serialization
  • Describe the purpose of the Job Entry Subsystem (JES)
  • Understand job flow through the z/OS environment
  • Describe the allocation process for the data sets in the z/OS environment
  • Understand how Input/Output (I/O) requests are processed in the z/OS environment
  • Describe how workload management is accomplished in a z/OS environment
  • Explain the z/OS recovery processes and list the available problem determination tools
  • Describe z/OS storage management concepts
  • Describe the UNIX System Services functions provided in the z/OS environment
  • Create a high-level plan for the installation and configuration of z/OS
Who Should Take This Course

This course will be of interest to anyone working or interacting with IBM (or third party) products in the z/OS, CICS, Database, Network or related application areas.

Recommended Prerequisites

No previous z/OS experience is required. However some exposure to the z/OS environment or at least another IT platform would be useful.

Training Style

Hands-on, Instructor-Led

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Related Courses
Code Course Title Duration Level
z/OS Concepts
2 Days
z/VM Overview
2 Days
z/VM In Depth
2 Days

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