1 introduction to the new mainframe stephen s. linkin houston community college ©hccs & ibm®...

©HCCS & IBM® 2008 Stephen Linkin 1

Introduction To The New Mainframe

Stephen S. LinkinHouston Community College

©HCCS & IBM® 2008 Stephen Linkin 2

The New Mainframe

Mainframe Computers Play A Central Role In Daily Operations

Coveted Place In Today’s E-business Environment. Banking, Finance, Healthcare, Insurance,

Public Utilities, Government Mainframe Computing Dominates Large-

Scale Business Computing.

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The New Mainframe

70% of all web pages are stored on mainframe systems

Transaction Processing is a Prime use.

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The S/360: A Turning Point In Mainframe History

IBM 701 Circa 1951 Univac System Circa 1950 IBM 1401 Circa 1956 IBM 360 Circa 1964

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The S/360: A Turning Point In Mainframe History

A Series Of Generations First Generation Systems – 1951 Second Generation – 1956 Third Generation - 1964

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The S/360: A Turning Point In Mainframe History

Standardized Mainframe Computers Microcode

Corrections Or New Functions Can Be Implemented By Updating

No Concern Over Compatibility Standardized Languages

Assembler, COBOL, FORTRAN, PL/1

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The S/360: A Turning Point In Mainframe History

Standardized Software Utilities

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An Evolving Architecture

Definition Of Architecture

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An Evolving Architecture

More And Faster Processors More Physical Memory And Greater

Memory Addressing Capability Dynamic Upgrading Of Hardware And

Software Automation Of Hardware Error Checking

And Recovery

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An Evolving Architecture

Enhanced (I/O) More And Faster Channels Sophisticated I/O Attachments, E.G. LAN

Adapters Ability To Divide Resources Of One Machine

Into Multiple, Isolated Systems, Running Its Own OS

Advanced Clustering, Parallel Sysplex, That Share Data Among Multiple Systems.

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An Evolving Architecture

Stable Secure Compatible

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Mainframes In Our Midst

Mainframes Are Largely Invisible They Are Resistant To Viruses And

Trojan Horses. They Share Space With Other Hardware

Devices: External Storage Devices Hardware Network Routers Channel Controllers Automated Tape “Robots”

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What Is A Mainframe?

The Largest Servers Server Farms

Networked ServersCentral Data Repository PlatformThe Single Box…

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What Is A Mainframe?

Style Of Operation Hosting Commercial Databases Transaction Servers Applications Requiring A Great

Degree Of Security

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What Is A Mainframe?

Style Of Operation Compatibility Centralized Control Of

Resources Shared Access To Disk Drives

On Other Systems

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What Is A Mainframe?

Style Of Operation Dedicated Operations Staff S.O.P

Clustering Technologies Parallel Sysplex

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Who uses mainframe computers? Everyone

Perform large-scale transaction processing (thousands of transactions per second)

Support thousands of users and application programs concurrently accessing resources

Manage terabytes of information in databases Handle large-bandwidth communication

The roads of the information superhighway often lead to a mainframe.

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Factors contributing to mainframe use

Reliability, Availability, Serviceability Security Scalabilty Continuing Compatibility Evolving Architecture

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Factors contributing to mainframe use

Reliability, Availability, Serviceability

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Factors contributing to mainframe use

Security

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Factors contributing to mainframe use

Scalabilty

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Factors contributing to mainframe use

Continuing Compatibility

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Factors contributing to mainframe use

Evolving Architecture

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Typical mainframe workloads

Batch Interactive

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Typical mainframe workloads

BatchFig 1-2

Large Volumes Timed Activity Multiple Tasks

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Typical mainframe workloads

InteractiveFig 1-3

Immediate Short Response

Time Mission Critical

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Roles in the mainframe world

System Programmers System

Administrators Application Designers

And Programmers System Operators Production Control Analysts

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z/OS and other mainframe operating systems

z/OS z/VM® z/VSE™ Linux z/TPF

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z/OS and other mainframe operating systems

z/OS

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z/OS and other mainframe operating systems

z/VM®

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z/OS and other mainframe operating systems

z/VSE™

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z/OS and other mainframe operating systems

Linux

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z/OS and other mainframe operating systems

z/TPF

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Summary

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