©HCCS & IBM® 2008 Stephen Linkin1 Mainframe Hardware Systems And High Availability Stephen S. Linkin Houston Community College © HCCS and IBM 2008

©HCCS & IBM® 2008 Stephen Linkin2 Introduction To Mainframe Hardware Systems Terminology Or JARGON Fig 2-1

©HCCS & IBM® 2008 Stephen Linkin3 Early System Design  What Is In The Box Processors Memory Control Circuits Interfaces  S/360 system

©HCCS & IBM® 2008 Stephen Linkin4 Early System Design  Channel Addresses Hex Parallel Channels

©HCCS & IBM® 2008 Stephen Linkin5 Current Design  I/O Connectivity  System Control And Partitioning  Characteristics Of LPARS  Consolidation Of Mainframes

©HCCS & IBM® 2008 Stephen Linkin6 Current Design  I/O Connectivity

©HCCS & IBM® 2008 Stephen Linkin7 Current Design  I/O Connectivity

©HCCS & IBM® 2008 Stephen Linkin8 Current Design  System Control And Partitioning PR/SM™

©HCCS & IBM® 2008 Stephen Linkin9 Current Design  System Control And Partitioning PR/SM™  LPARS

©HCCS & IBM® 2008 Stephen Linkin10 Current Design  Characteristics Of LPARS Equivalent To Separate Mainframes No Need To Run z/OS, In Each LPAR  z/OS In LPAR1  Test Version Of z/OS In LPAR2  Linux For S/390 In LPAR3

©HCCS & IBM® 2008 Stephen Linkin11 Current Design  Consolidation Of Mainframes Fewer Machines More Power Software Expense

©HCCS & IBM® 2008 Stephen Linkin12 Processing Units  Central Processor (CP)  System Assistance Processor (SAP)  Integrated Facility For Linux (IFL)  zAAP

©HCCS & IBM® 2008 Stephen Linkin13 Processing Units  zIIP  Integrated Coupling Facility (ICF)  Spare  Capacity on Demand

©HCCS & IBM® 2008 Stephen Linkin14 Multiprocessors  Possible To Purchase With A Single CP  Minimum Configuration Is Two Processors  Owned By System Or LPAR Channels I/O Devices Interrupts Memory

©HCCS & IBM® 2008 Stephen Linkin15 Multiprocessors  Memory Private Area Of Memory (8 KB)  PSA

©HCCS & IBM® 2008 Stephen Linkin16 Disk Devices  IBM 3390 Disk Drives  IBM 2105 Enterprise Storage Server® Commodity SCSI Units RAID 5

©HCCS & IBM® 2008 Stephen Linkin17 Clustering  Basic Shared DASD  CTC Rings  Parallel Sysplex

©HCCS & IBM® 2008 Stephen Linkin18 Clustering  Basic Shared DASD

©HCCS & IBM® 2008 Stephen Linkin19 Clustering  CTC Rings Usage And Locking Queue Information Security Controls

©HCCS & IBM® 2008 Stephen Linkin20 Clustering  Parallel Sysplex

©HCCS & IBM® 2008 Stephen Linkin21 What Is An IBM Parallel Sysplex?

©HCCS & IBM® 2008 Stephen Linkin22 What Is An IBM Parallel Sysplex?  Coupling Facility  Clustering Technologies For The Mainframe Shared Data Clustering Non-disruptive Maintenance

©HCCS & IBM® 2008 Stephen Linkin23 What Is An IBM Parallel Sysplex?  What Is A Coupling Facility?  Hardware & Software 1. Locking Information 2. Cache Information 3. Data List Information

©HCCS & IBM® 2008 Stephen Linkin24 What Is An IBM Parallel Sysplex?  Clustering Technologies For The Mainframe Shared Data Clustering Non-disruptive Maintenance

©HCCS & IBM® 2008 Stephen Linkin25 Typical Mainframe Systems  Very Small Systems

©HCCS & IBM® 2008 Stephen Linkin26 Typical Mainframe Systems  Very Small Systems  Medium Single Systems

©HCCS & IBM® 2008 Stephen Linkin27 Typical Mainframe Systems  Very Small Systems  Medium Single Systems  Larger Systems

©HCCS & IBM® 2008 Stephen Linkin28 Continuous Availability Of Mainframes

©HCCS & IBM® 2008 Stephen Linkin29 Continuous Availability Of Mainframes  No Single Points Of Failure

©HCCS & IBM® 2008 Stephen Linkin30 Continuous Availability Of Mainframes  No Single Points Of Failure  Capacity And Scaling

©HCCS & IBM® 2008 Stephen Linkin31 Continuous Availability Of Mainframes  No Single Points Of Failure  Capacity And Scaling  Dynamic Workload Balancing Workload Distribution Generic Resource Management

©HCCS & IBM® 2008 Stephen Linkin32 Continuous Availability Of Mainframes  No Single Points Of Failure  Capacity And Scaling  Dynamic Workload Balancing Workload Distribution Generic Resource Management

©HCCS & IBM® 2008 Stephen Linkin33 Continuous Availability Of Mainframes  Ease Of Use Workload Management (WLM) Component

©HCCS & IBM® 2008 Stephen Linkin34 Continuous Availability Of Mainframes  Ease Of Use Workload Management (WLM) Component Sysplex Failure Manager (SFM)

©HCCS & IBM® 2008 Stephen Linkin35 Continuous Availability Of Mainframes  Ease Of Use Workload Management (WLM) Component Sysplex Failure Manager (SFM) Automatic Restart Manager (ARM) Cloning And Symbolics

©HCCS & IBM® 2008 Stephen Linkin36 Continuous Availability Of Mainframes  Ease Of Use Workload Management (WLM) Component Sysplex Failure Manager (SFM) Automatic Restart Manager (ARM) Cloning And Symbolics Z/series Resource Sharing

©HCCS & IBM® 2008 Stephen Linkin37 Continuous Availability Of Mainframes  Single System Image Single Point Of Control Persistent Single System Image Across Failures

©HCCS & IBM® 2008 Stephen Linkin38 Continuous Availability Of Mainframes  Compatible Change And Non- disruptive Growth  Application Compatibility

©HCCS & IBM® 2008 Stephen Linkin39 Continuous Availability Of Mainframes  Compatible Change And Non- disruptive Growth  Application Compatibility  Disaster Recovery

©HCCS & IBM® 2008 Stephen Linkin40 Summary  Read The Redbook