Introduction To The New Mainframe

1. Introduction To The New Mainframe Stephen S. Linkin Houston 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. ©HCCS & IBM® 2008 Stephen Linkin

3. The New Mainframe • 70% of all web pages are stored on mainframe systems • Transaction Processing is a Prime use. ©HCCS & IBM® 2008 Stephen Linkin

4. 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 ©HCCS & IBM® 2008 Stephen Linkin

5. The S/360: A Turning Point In Mainframe History • A Series Of Generations • First Generation Systems – 1951 • Second Generation – 1956 • Third Generation - 1964 ©HCCS & IBM® 2008 Stephen Linkin

6. 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 ©HCCS & IBM® 2008 Stephen Linkin

7. The S/360: A Turning Point In Mainframe History • Standardized Software Utilities ©HCCS & IBM® 2008 Stephen Linkin

8. An Evolving Architecture • Definition Of Architecture ©HCCS & IBM® 2008 Stephen Linkin

9. 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 ©HCCS & IBM® 2008 Stephen Linkin

10. 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. ©HCCS & IBM® 2008 Stephen Linkin

11. An Evolving Architecture • Stable • Secure • Compatible ©HCCS & IBM® 2008 Stephen Linkin

12. 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” ©HCCS & IBM® 2008 Stephen Linkin

13. What Is A Mainframe? • The Largest Servers • Server Farms • Networked Servers • Central Data Repository • Platform • The Single Box… ©HCCS & IBM® 2008 Stephen Linkin

14. What Is A Mainframe? • Style Of Operation • Hosting Commercial Databases • Transaction Servers • Applications Requiring A Great Degree Of Security ©HCCS & IBM® 2008 Stephen Linkin

15. What Is A Mainframe? • Style Of Operation • Compatibility • Centralized Control Of Resources • Shared Access To Disk Drives On Other Systems ©HCCS & IBM® 2008 Stephen Linkin

16. What Is A Mainframe? • Style Of Operation • Dedicated Operations Staff • S.O.P • Clustering Technologies • Parallel Sysplex ©HCCS & IBM® 2008 Stephen Linkin

17. 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. ©HCCS & IBM® 2008 Stephen Linkin

18. Factors contributing to mainframe use • Reliability, Availability, Serviceability • Security • Scalabilty • Continuing Compatibility • Evolving Architecture ©HCCS & IBM® 2008 Stephen Linkin

19. Factors contributing to mainframe use • Reliability, Availability, Serviceability ©HCCS & IBM® 2008 Stephen Linkin

20. Factors contributing to mainframe use • Security ©HCCS & IBM® 2008 Stephen Linkin

21. Factors contributing to mainframe use • Scalabilty ©HCCS & IBM® 2008 Stephen Linkin

22. Factors contributing to mainframe use • Continuing Compatibility ©HCCS & IBM® 2008 Stephen Linkin

23. Factors contributing to mainframe use • Evolving Architecture ©HCCS & IBM® 2008 Stephen Linkin

24. Typical mainframe workloads • Batch • Interactive ©HCCS & IBM® 2008 Stephen Linkin

25. Typical mainframe workloads • Batch Fig 1-2 • Large Volumes • Timed Activity • Multiple Tasks ©HCCS & IBM® 2008 Stephen Linkin

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27. Typical mainframe workloads • InteractiveFig 1-3 • Immediate • Short Response Time • Mission Critical ©HCCS & IBM® 2008 Stephen Linkin

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29. Roles in the mainframe world • System Programmers • System Administrators • Application Designers And Programmers • System Operators • Production Control Analysts ©HCCS & IBM® 2008 Stephen Linkin

30. z/OS and other mainframe operating systems • z/OS • z/VM® • z/VSE™ • Linux • z/TPF ©HCCS & IBM® 2008 Stephen Linkin

31. z/OS and other mainframe operating systems • z/OS ©HCCS & IBM® 2008 Stephen Linkin

32. z/OS and other mainframe operating systems • z/VM® ©HCCS & IBM® 2008 Stephen Linkin

33. z/OS and other mainframe operating systems • z/VSE™ ©HCCS & IBM® 2008 Stephen Linkin

34. z/OS and other mainframe operating systems • Linux ©HCCS & IBM® 2008 Stephen Linkin

35. z/OS and other mainframe operating systems • z/TPF ©HCCS & IBM® 2008 Stephen Linkin

36. Summary • Read The Redbook ©HCCS & IBM® 2008 Stephen Linkin