z/OS Introduction

Course objectives
After the training the students will have the basic theoretical knowledge necessary for every IBM mainframe user.
This course should to be seen as an introduction course which is necessary for further classes.
On the other hand this training will cover all fundamental concepts and terminology of OS/390 and z/OS which will enable the participants to consult the OS/390 and z/OS literature independently. During the class do we explain the 'how' but also the 'why' of OS/390 and z/OS functionality.

Audience
- All

Prerequisites
- None

Course contents

Multiple Virtual Storage (MVS)

Multiprogramming, multitasking, interrupts, program status word (PSW), CPU states, SPOOLing, virtual storage, address spaces, Authorized Program Facility (APF), etc.

How the mainframe architectures evolved: System/370 → Extended Architecture (XA) → Enterprise Systems Architectures (ESA/370 and ESA/390) → Zero-down-time Architecture (z/Architecture)

Data set organization

Non-VSAM and Virtual Storage Access Method (VSAM) data sets

Integrated Catalog Facility (ICF)

I/O optimization and I/O avoidance techniques

The differences between MVS, OS/390 and z/OS

Job Entry Subsystem 2 (JES2)

What is Job Control Language (JCL)?

UNIX System Services ("USS")

Workload types

Batch: job classes, initiators, SYSOUT classes, ...

Interactive program development using the Time Sharing Option (TSO) and the Interactive System Productivity Facility (ISPF)

Program development using UNIX System Services

Online processing and data bases

Operating systems and subsystems

Relation between MVS-OS/390-z/OS, Virtual Machine (VM), and Virtual Storage Extended (VSE)

Transaction processing/Teleprocessing (TP) monitors: Customer Information Control System (CICS), Information Management System/Transaction Manager (IMS/TM), ...

Data base management systems (DBMSs): IMS/DB, DB2, ...

Virtual Telecommunication Access Method (VTAM)

System Management Facility (SMF)

Mainframe Architecture

Uniprocessor (UP) versus Multiprocessor (MP)

Loosely-coupled MP

System complex (SYSPLEX), Parallel Sysplex, and Coupling Facility (CF)

Processor Resource/Systems Manager (PR/SM)

Processor types

S/370 architecture

16-MB address space

I/O processing

Dual Address Space (DAS) facility & Cross Memory Services (XMS)

Extended Architecture (XA)

2-GB address space

Bimodal (i.e. 24-bit and 31-bit) addressing mode

Dynamic Channel Subsystem (DCS)

Expanded storage (ESTOR)

ESA/370 - 390 Architecture

Data Spaces & Hiperspaces

Advanced Address Space Facility (AASF)

Enterprise Systems Connectivity (ESCON)

z/Architecture

16-EB address space

Trimodal (i.e. 24-bit, 31-bit, and 64-bit) addressing mode

Fiber Connection (FICON)

MVS, OS/390, and z/OS

Program management

Resource Access Control Facility (RACF)

System-managed storage (SMS)

Why do we need standards (data set names, job classes, ...)?

Types of address spaces

Console operations

Workload Manager (WLM)

Questions & Answers