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Z/OS Basics 3.8 Typical Mainframe Systems

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Z/OS Basics 3.8 Typical Mainframe Systems Contents Preface . .i How this course is organized . .i How each topic is organized . ii Part 1. System programming on z/OS Chapter 1. Overview of system programming . 7 1.1 The role of the system programmer . 8 1.2 What is meant by separation of duties . 9 1.3 Customizing the system . 10 1.3.1 z/OS system libraries . 12 1.3.2 SYS1.PARMLIB . 12 1.3.3 Link pack area (LPA). 13 1.3.4 Pageable link pack area (PLPA) . 13 1.3.5 Fixed link pack area (FLPA) . 14 1.3.6 Modified link pack area (MLPA) . 15 1.3.7 SYS1.PROCLIB . 15 1.3.8 The master scheduler subsystem . 15 1.3.9 A job procedure library . 17 1.3.10 Search order for programs . 18 1.3.11 What system symbols are . 19 1.4 Managing system performance . 21 1.5 Configuring I/O devices . 22 1.6 Following a process of change control . 23 1.6.1 Risk assessment . 24 1.6.2 Change control record system . 24 1.6.3 Production control . 25 1.7 Configuring consoles. 26 1.8 Using SMP/E to manage changes . 29 1.9 Initializing the system . 31 1.9.1 Initialization process . 32 1.9.2 IPL types . 37 1.9.3 Shutting down the system . 38 1.10 Summary . 39 Chapter 2. Using SMP/E . 41 2.1 What is SMP/E? . 42 2.2 The SMP/E view of the system . 42 2.3 Changing system elements . 44 © Copyright IBM Corp. 2005, 2006. All rights reserved. 1 2.4 Introducing an element into the system. 44 2.5 Preventing problems with an element . 46 2.6 Fixing problems with an element. 47 2.7 Customizing an element - USERMOD SYSMOD . 48 2.7.1 Prerequisites and corequisites . 49 2.8 Tracking and controlling elements. 50 2.9 Working with SMP/E . 50 2.9.1 SMP/E basic commands . 51 2.10 When is SMP/E used? . 62 2.11 Why is SMP/E used?. 63 2.12 Terminology. 63 2.12.1 Communicating with IBM Defect Support . 63 2.12.2 Consolidate Software Inventory (CSI) and zones . 64 2.12.3 Maintenance . 65 2.13 Local SMP/E Environments. 67 2.13.1 Production, Test and Emergency Fix . 67 2.13.2 Base z/OS and Product CSIs . 68 2.14 How to use SMP/E . 68 2.14.1 SYSMOD. 68 2.14.2 JCL . 69 2.14.3 RECEIVE Command. 69 2.14.4 APPLY Command . 69 2.14.5 ACCEPT Command . 70 2.14.6 LIST Command . 70 2.15 ISPF . 70 2.16 Order and download IBM fixes . 74 2.17 Summary . 74 Chapter 3. Hardware systems and LPARs . 77 3.1 Overview of mainframe hardware systems . 78 3.2 Early system design . 79 3.3 Current design. 81 3.3.1 I/O connectivity . 82 3.3.2 System control and partitioning. 84 3.3.3 Characteristics of LPARs . 86 3.3.4 Consolidation of mainframes. 87 3.4 Processing units . 88 3.5 Multiprocessors . 89 3.6 Disk devices . 90 3.7 Clustering . 92 3.7.1 Basic shared DASD . 92 3.7.2 CTC rings . 94 3.7.3 Parallel sysplex . 95 2 z/OS Basics 3.8 Typical mainframe systems. 97 3.8.1 Very small systems . 97 3.8.2 Medium single systems. 98 3.8.3 Larger systems . 99 3.9 Summary . 101 Chapter 4. Parallel Sysplex and continuous availability. 103 4.1 Future of the new mainframe . 104 4.2 What a Parallel Sysplex is. 104 4.2.1 Shared data clustering . 105 4.2.2 Non-disruptive maintenance . 106 4.3 Continuous availability of mainframes. ..
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