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Introduction To The New Mainframe
Stephen S. LinkinHouston Community College
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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
Read The Redbook