z/OS Concepts and Components
Duration
7 hours
Overview
The z/OS Concepts and Components course describes the evolution of mainframe computing and provides descriptions of the major components that comprise today's z/OS environment. Details of general z/OS processing concepts are also provided.
Audience
Operations, programming, and technical support personnel requiring knowledge about z/OS; this course provides a broad introduction to many aspects of the z/OS environment.
Prerequisites
None
Objectives
After completing this course, the student will be able to:
- Identify the characteristics of an operating system that make multiprogramming possible
- Identify the names and functions of commonly used z/OS system components
- Describe the compile and bind process used to create an executable program
- Describe how I/O is processed in a mainframe environment
- List the system components that participate in z/OS system resource sharing
- Describe how Workload Management (WLM) manages resources
Course Content
Mainframe Evolution
Early Computer Systems
The Supervisor
Input/ Output Fundamentals
Multiprogramming
SPOOL
Virtual Storage
TSO, VTAM, and ISPF
Major Components of the z/OS System
Subsystems
Job Control Language
TSO/E and ISPF
VTAM and TCP/IP
The Workload Manager
The System Log
System Automation
CICS, IMS, Db2, IBM MQ, RACF
SMS/HSM
Compilers, Binders, and Utilities
Compilers
The Binder
Utility Programs
How z/OS Processes I/O
The I/O Operation
Channel Subsystem
CCW and Coupling Channels
I/O Definitions
Open Systems Adapter
OSA Express
Hipersockets
Mainframe Resource Sharing
PR/SM
Physical and Logical CPU Sharing
Channel Sharing
Sharing Across the SYSPLEX
Coupling Facility
Serialization
Workload Management and WLM
The Need to Share Resources
WLM
Dispatchable Units, Address Spaces, and Enclaves
Dispatching Priority
I/O Priority
WLM Service Classes
WLM Goals
Donor Receiver Concept