1 z/OS Overview Stephen S. Linkin Houston Community College © HCCS and IBM 2008 ©HCCS & IBM® 2008...

©HCCS & IBM® 2008 Stephen Linkin 1

z/OS Overview

Stephen S. LinkinHouston Community College

© HCCS and IBM 2008


What Is An Operating System?


What Is z/OS?

Hardware Resources Used By z/OS The Standard Reference For Descriptions

Of The Major Facilities of z/Architecture is the IBM’s z/Architecture Principles of Operation.

http://www.ibm.com/servers/eserver/zseries/zos/bkserv/



What Is z/OS?


What Is z/OS?

Multiprogramming And Multiprocessing


What Is z/OS?

Modules And Macros


What Is z/OS?

Control Blocks System-related control blocks Resource-related control blocks Job-related control blocks Task-related control blocks


What Is z/OS?

Physical Storage Used By z/OS


Overview Of Z/OS Facilities


Virtual Storage And Other Mainframe Concepts

What Is Virtual Storage?



What Is An Address Space? Address Space Isolation



What Is An Address Space? Address Space Isolation Address Space Communication






What Is Dynamic Address Translation? Virtual Storage Overview





Format Of A Virtual Address



Virtual Storage Overview Format Of A Virtual Address How Virtual Storage Addressing Works In

z/OS



Virtual Storage Overview Format Of A Virtual Address How Virtual Storage Addressing Works In

z/OS Frames, Pages, And Slots


REAL VIRTUAL


What Is Paging? How Paging Works In z/OS



What Is Paging? How Paging Works In z/OS Page Stealing Unreferenced Interval Count



Swapping And The Working Set What Is Storage Protection?




How Storage Protect Keys Are Used




How Storage Protect Keys Are Used How Storage Protect Keys Are Assigned



Role Of Storage Managers Real Storage Manager Auxiliary Storage Manager Virtual Storage Manager



A Brief History Of Virtual Storage And 64-bit Addressability



What Is “Below-the-line Storage”?



What’s In An Address Space?



System Address Spaces And The Master Scheduler


What Is Workload Management?

What Does WLM Do? Goal Achievement Throughput Response And Turnaround Time




How Is WLM Used?


I/O and data management


Supervising Execution Of Work In The System

Tasks Involved Interrupt processing Dispatchable Units Of Work Dispatching Work Serializing Use Of Resources



What Is Interrupt Processing? SVC I/O External Restart Program Machine Check



What Is Interrupt Processing? How Is The Program Status Word Used?

Current PSW New PSW Old PSW



What Is Interrupt Processing? How Is The Program Status Word Used?

Current PSW New PSW Old PSW

Registers And The PSW



Creating Dispatchable Units Of Work What Is A TCB?



Creating Dispatchable Units Of Work What Is A TCB? What Is An SRB?



Preemptable Versus Non-preemptable What Does The Dispatcher Do?



Serializing The Use Of Resources What Is Global Resource Serialization?



Serializing The Use Of Resources What Is Global Resource Serialization? What Is Enqueuing? What Is Locking?



Serializing The Use Of Resources What Is Global Resource Serialization? What Is Enqueuing? What Is Locking?

IT’S MINE


A Brief Comparison Of z/OS And UNIX.


Summary

Read The Redbook

1 z/OS Overview Stephen S. Linkin Houston Community College © HCCS and IBM 2008 ©HCCS & IBM® 2008...

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