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 System/370 XA -Extended architecture - Address field 24 bits  31 bits - Expanded storage added to – System/370 Model 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/ rack-mounted system air-cooled model water-cooled series

7 System/390 History 1994 – Extensions to S/390 and ES/ 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 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 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 wizardswww.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.