SYSPLEX

1. SYSPLEX By : Seyed Hamid Alvani December 2003

2. Overview • System/390 History • Introduction to Sysplex • What is Sysplex ? • Why Sysplex ? • Sysplex Philosophy • Sysplex Software • Sysplex Hardware • Base/Parallel Sysplex

3. System/390 History • 1961 “SPREAD” corporate task force developed architecture for series of computers • 1964 System/360 - Core memory - Over 10 models - Architecture innovations for future upward compatibility

4. System/390 History • 1970 System/370 - Integrated circuit technology - Extended control mode - Virtual memory - Multi-processing - 17 different models - Two compatible product lines 30XX – large systems 43XX – mid-rang systems

5. System/390 History • 1983 - System/370 XA -Extended architecture - Address field 24 bits  31 bits - Expanded storage added to 3090 • 1985 – System/370 Model 9370 - CMOS technology • 1988 – Enterprise System Architecture/370 - Access registers

6. System/390 History • 1990 – ESA/390 – Enterprise System Architecture/390 - ESCON – Enterprise System Connections - Parallel Sysplex • 1990 – ES/9000 System/390 - 9221 rack-mounted system - 9121 air-cooled model - 9021 water-cooled series

7. System/390 History • 1994 – Extensions to S/390 and ES/9000 - Parallel Sysplex capability on 711-based and 511-based models - S/390 Parallel Enterprise Server - Generation 3,4 and 5 - Many models

8. zSeries History • 2001 – zSeries 900 - z/Architecture: 64-bit - Intelligent Resource Director - Advanced CMOS Technology - High density , high bandwidth I/O subsystem - New Parallel Sysplex Function - Availability enhancements

9. zSeries History • 2002 – zSeries 800 - Complete z/Architecture (64bit) - Flexible Model Structure - 8, 16, 24 or 32 GB memory

10. zSeries History

11. Introduction to Sysplex • Parallel Developments Symmetric Multiprocessor(SMP) Servers vs Single processor Servers • Making Connections Three cluster types: - Fail over or High-availability - Parallel - Single-system image

12. Introduction to Sysplex Parallel Sysplex scalability

13. What is Sysplex? • The Parallel Sysplex technology is a highly advanced commercial processing clustered system. • It supports high-performance, multisystem, read/write data sharing, enabling the aggregate capacity of multiple z/OS and OS/390 systems to be applied against common workloads.

14. What is Sysplex?

15. Why Sysplex? • Reduced cost through: -Cost effective processor technology - Continued use of large system data processing skills without re-education - Protection of OS/390 application investments - manage a large number of systems more easily than other comparably performing multisystem environments

16. Why Sysplex? • Platform for continuous availability so that applications can be available 24 hours a day, 7 days a week, 365 days a year

17. Why Sysplex? • Ability to do more work - Greater capacity - Improved ability to manage response time - Platform for further capacity and response time advances

18. Why Sysplex? • Greater flexibility - Ability to mix levels of hardware and software - Ability to dynamically add systems - An easy path for incremental growth - Varied platforms for applications

19. Sysplex Philosophy • Data sharing • Dynamic workload balancing • Incremental growth • Symmetry in a sysplex • Single system image - Different perspectives on single system image - Single point of control • Continuous availability • Continuous operations

20. Sysplex Software • System software • Networking software • Data management software • Transaction management software • System management software

21. Sysplex Software

22. Sysplex Software • z/OS Workload Manager (WLM) • z900 Intelligent Resource Director • Sysplex Distributor function in OS/390 R10 allows a sysplex-wide Virtual IP Addressing (VIPA) • Web-based Parallel Sysplex Configuration Assistant

23. Sysplex Software • z/OS Managed System Infrasturcture for Setup (msys) • WLM Goal Mode Migration Aid • www.ibm.com/server/eserver/zseries/zos/wizards

24. Sysplex Hardware • Coupling facility • Coupling facility channels • Sysplex Timers • System/390 processors • ESCON channels and directors • ESCON contol units and I/O devices

25. Sysplex Hardware • The Coupling Facility (CF) provides hardware and microcode assists for rich and diverse set of multisystem data sharing functions, is at the heart of Parallel Sysplex “Coupling” technology. • The Coupling Facility provides three models to enable efficient clustering protocols: • Lock model • Cache model • List model

26. Sysplex Hardware • The Coupling Facility consists of hardware and specialized microcode, Coupling Facility Control Code(CFCC), supporting the S/390 Parallel Sysplex command architecture. • IBM CF Control Code runs in: - CF LPAR, which can reside on a standalone z900 model 100, 9672-R06 or 9674 clustering facility. - Internal Coupling Facility on a z900 server or a 9672 server (starting with the G3 servers) - Logical partition on a z900 or 9672

27. Sysplex Hardware • When significant new function is defined, a new version of the CF microcode is released, supporting the new functions as defined by the latest architecture CFLEVEL. • Summerized information regarding CF Levels can be found in two next pages.

28. Sysplex Hardware

29. Sysplex Hardware CF Level of Support • G1 base can be upgraded to CF Level 4 • G2 base can be upgraded to CF Level 5 • G3 and G4 can be upgraded to CF Level 8 • G5 base CF Level code is CF Level 6 • G6 base CF Level code is CF Level 8 • z900 base CF Level code is CF Level 9 • ICF support is for G3+ only

30. Sysplex Hardware • Internal Coupling Facility - Starting with the G3 Servers. - ICF cut the cost of exploiting Coupling Facility technology by reducing the need for an external CF. - Software license charges are not applicable to ICF processor because ICF runs CFCC microcode and not z/OS or OS/390.

31. Sysplex Hardware

32. Sysplex Hardware • Integrated CF Migration Facility (ICMF) - The ICMF was initially introduced as a test/migration aid for customers wishing to test their Parallel Sysplex environment on a single machine prior to multisystem deployment. - The ICMF is basically a linkless CF. - The ICMF is no longer avaible starting with the z900 server.

33. Sysplex Hardware • Coupling links • Inter-system Channel (ISC) • HiperLinks (High Performance coupling links) • Integrated Cluster Bus (ICB) • Internal Coupling (IC) channels (linkless) • LPAR-simulated coupling links via ICMF (linkless)

34. Sysplex Hardware • Sysplex Timer - The 9037 Sysplex Timer is mandatory hardware requirment for a parallel sysplex consisting of more than one CPC. - The 9037 provides the synchronization for the time-of-day (TOD) clocks of multiple CPCs, and thereby allows events started by different CPCs to be properly sequenced in time.

35. Base/Parallel Sysplex • Base Sysplex - IBM introduced MVS Sysplex in September 1990 to help solve difficulties of managing many MVS systems. - In a base sysplex, CPCs are connected by CTCA and a shared dataset supports the communication. - When more than on CPC is involved, a Sysplex Timer synchronizes the time on all systems. - The same capacity as loosely coupled but Better and simpler systems management.

36. Base/Parallel Sysplex • Parallel Sysplex - supports greater number of systems and significantly improves communications and data sharing. - High performance data sharing through a new coupling technology (Coupling Facility).

37. Parallel Sysplex • Geographically Dispersed Parallel Sysplex GDPS is a multi-site application availability solution that provides the capability to manage the remote copy configuration and storage subsystems,automates Parallel Sysplex operational tasks and failure recovery from a single point of control.