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Transcript of 1 SYSPLEX By : Seyed Hamid Alvani December 2003. 2 Overview System/390 History Introduction to...
1
SYSPLEX
By : Seyed Hamid Alvani
December 2003
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Overview
• System/390 History• Introduction to Sysplex• What is Sysplex ?• Why Sysplex ?• Sysplex Philosophy• Sysplex Software• Sysplex Hardware• Base/Parallel Sysplex
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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
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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
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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
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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
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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
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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
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zSeries History
• 2002 – zSeries 800
- Complete z/Architecture (64bit)
- Flexible Model Structure
- 8, 16, 24 or 32 GB memory
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zSeries History
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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
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Introduction to Sysplex
Parallel Sysplex scalability
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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.
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What is Sysplex?
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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
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Why Sysplex?
• Platform for continuous availability so that
applications can be available 24 hours a
day, 7 days a week, 365 days a year
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Why Sysplex?
• Ability to do more work
- Greater capacity
- Improved ability to manage response time
- Platform for further capacity and response time advances
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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
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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
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Sysplex Software
• System software
• Networking software
• Data management software
• Transaction management software
• System management software
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Sysplex Software
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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
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Sysplex Software
• z/OS Managed System Infrasturcture for Setup (msys)
• WLM Goal Mode Migration Aid
• www.ibm.com/server/eserver/zseries/zos/wizards
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Sysplex Hardware
• Coupling facility
• Coupling facility channels
• Sysplex Timers
• System/390 processors
• ESCON channels and directors
• ESCON contol units and I/O devices
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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
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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
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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.
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Sysplex Hardware
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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
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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.
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Sysplex Hardware
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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.
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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)
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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.
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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.
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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).
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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.