z/OS Concepts

Audience

This course is designed for anyone setting up or maintaining the z/OS operating system. It builds upon the information in the course ZOSI (z/OS for Beginners) looking more in depth at the functions of the operating system. It can be seen as a complement to the courses ZOSISP (z/OS Implementation Using ServerPac) and SPI (z/OS System Programmer Introduction) in developing an installation tailored and configured system. It is a suitable prerequisite to course ZOSS (z/OS System Services).

Prerequisites

Delegates should have attended z/OS for Beginners or have equivalent knowledge.

Duration

2 days. Hands on.

Course Objectives

To show delegates how the installation definitions set at initialisation time and later are handled by the system. The course also deepens the delegates understanding of the functions of the z/OS operating system so that the effect of performance tuning and availability of diagnostic data is understood better. There are some topics which introduce system features, such as the Workload Manager, which are explored further in other courses.

Course Content

What is z/OS?
The History of z/OS
Elements and Features

z/OS Architecture
Hardware components
Software components
Virtual Storage Layout
Dynamic Address Translation
System Address Spaces
Started Tasks
Data Spaces
Hiperspaces
Hardware and Software Interfaces
PSW
Register Sets
Interrupt Processing
The Address Space and Programs
Tasks in an Address Space
SVC Routines

System Libraries
Defining the System
IPL Overview
LOADxx Member
Loading the Nucleus
Logical Parmlib
Specifying IEASYSxx
SQA and CSA Specification
Program Management
Loading the Link Pack Areas
The LNKLST
Authorised Program Facility – APF
Defining Susbsystems
SCHEDxx member of Parmlib
SVC Routines
Master Scheduler Address Space
Library Lookaside
PDSEs
Virtual Lookaside Facility

Catalogs, Page Data Sets and Consoles
The Catalog Structure
Page Data Sets
Consoles

The Sysplex
Sysplex Overview
Basic Sysplex
Parallel Sysplex
Couple Data Sets
Coupling Facility
System Symbols
Global Resource Serialization
GRS and Sysplex
RESERVE

Workload Manager
Workload Manager and Performance
Setting Goals
Goal Mode and the Sysplex
Transaction Routing
Intelligent Resource Director

Logic Flow
I/O Processing
User Program Functions
Access Method Functions
I/O Driver Functions
I/O Supervisor Functions
Channel Subsystem
WAIT/POST
Recovery Management
User Level Errors
ESTAE Routines
Job Scheduling
JES2 Phases
Initiator Functions