©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 Linkin 1

Mainframe Hardware Systems And High AvailabilityStephen S. LinkinHouston Community College

© HCCS and IBM 2008


Introduction To Mainframe Hardware Systems

Terminology Or JARGONFig 2-1


Early System Design

What Is In The Box Processors Memory Control Circuits Interfaces

S/360 system


Early System Design

Channel Addresses Hex Parallel Channels

http://ascii.cl/conversion.htm


Current Design

I/O Connectivity System Control And Partitioning Characteristics Of LPARS Consolidation Of Mainframes


Current Design

I/O Connectivity


Current Design

I/O Connectivity


Current Design

System Control And Partitioning PR/SM™


Current Design

System Control And Partitioning PR/SM™ LPARS


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


Current Design

Consolidation Of Mainframes Fewer Machines More Power Software Expense


Processing Units

Central Processor (CP) System Assistance Processor (SAP) Integrated Facility For Linux (IFL) zAAP


Processing Units

zIIP Integrated Coupling Facility (ICF) Spare Capacity on Demand


Multiprocessors

Possible To Purchase With A Single CP Minimum Configuration Is Two

Processors Owned By System Or LPAR

Channels I/O Devices Interrupts Memory


Multiprocessors

Memory Private Area Of Memory (8 KB)

PSA


Disk Devices

IBM 3390 Disk Drives IBM 2105 Enterprise Storage Server®

Commodity SCSI Units RAID 5


Clustering

Basic Shared DASD CTC Rings Parallel Sysplex


Clustering

Basic Shared DASD


Clustering

CTC Rings Usage And Locking Queue Information Security Controls


Clustering

Parallel Sysplex


What Is An IBM Parallel Sysplex?



Coupling Facility Clustering Technologies For The

Mainframe Shared Data Clustering Non-disruptive Maintenance



What Is A Coupling Facility? Hardware & Software

1. Locking Information

2. Cache Information

3. Data List Information



Clustering Technologies For The Mainframe Shared Data Clustering Non-disruptive Maintenance


Typical Mainframe Systems

Very Small Systems



Very Small Systems Medium Single Systems



Very Small Systems Medium Single Systems Larger Systems


Continuous Availability Of Mainframes



No Single Points Of Failure



No Single Points Of Failure Capacity And Scaling



No Single Points Of Failure Capacity And Scaling Dynamic Workload Balancing

Workload Distribution Generic Resource Management



No Single Points Of Failure Capacity And Scaling Dynamic Workload Balancing

Workload Distribution Generic Resource Management



Ease Of Use Workload Management (WLM)

Component




Component Sysplex Failure Manager (SFM)




Component Sysplex Failure Manager (SFM) Automatic Restart Manager (ARM) Cloning And Symbolics




Component Sysplex Failure Manager (SFM) Automatic Restart Manager (ARM) Cloning And Symbolics Z/series Resource Sharing



Single System Image Single Point Of Control Persistent Single System Image Across

Failures



Compatible Change And Non-disruptive Growth

Application Compatibility



Compatible Change And Non-disruptive Growth

Application Compatibility Disaster Recovery


Summary

Read The Redbook

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

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