Front cover Virtualization Cookbook for IBM Z Volume 1 IBM z/VM 7.2 Lydia Parziale Edi Lopes Alves Vic Cross Paul Novak Mauro Cesar de Souza Redbooks International Technical Support Organization Virtualization Cookbook for IBM Z Volume 1 July 2021 SG24-8147-02 Note: Before using this information and the product it supports, read the information in “Notices” on page xiii. Third Edition (July 2021) This edition applies to IBM z/VM Version 7, Release 2, Red Hat Enterprise Linux version 8, and SUSE Linux Enterprise Server 15 GA, and Ubuntu Server 20.04. © Copyright International Business Machines Corporation 2015, 2016, 2021. All rights reserved. Note to U.S. Government Users Restricted Rights -- Use, duplication or disclosure restricted by GSA ADP Schedule Contract with IBM Corp. Contents Notices . xiii Trademarks . xiv Preface . 1 Concept of the series . 1 Volumes in this series . 2 Main parts of this volume . 2 Considerations . 3 Conventions . 3 Font conventions in this cookbook series . 3 Command conventions that are used in this cookbook series . 3 Operating system releases that are used . 3 Authors. 4 With gratitude . 5 Now you can become a published author, too! . 7 Comments welcome. 7 Stay connected to IBM Redbooks . 7 Summary of changes. 9 Summary of changes in this book . 9 Part 1. z/VM cloud concepts and planning. 11 Chapter 1. Conceptual overview . 13 1.1 Basic concepts . 14 1.2 Why choose this hardware platform, and why z/VM? . 15 1.2.1 Virtualization and cloud computing originated here . 15 1.2.2 The ultimate virtualization platform . 15 1.2.3 Optimized for Linux . 16 1.2.4 The hidden secret . 17 1.2.5 A community of friends . 17 1.3 The philosophy that was adopted in authoring this book . 17 1.4 A high-level overview of components and terminology . 18 1.4.1 Hardware . 18 1.4.2 Software . 20 1.4.3 z/VM capabilities and enhancements by version and release . 22 1.5 Choices and decisions for this book . 27 1.6 Single system image design . 29 1.7 Infrastructure design . 30 1.8 Usability tests that are performed . 31 1.9 Critical differences of LOGOFF versus DISCONNECT. 31 1.10 Summary of Linux and z/VM similarities . 32 Chapter 2. Planning . 33 2.1 Hardware operation and interface mode. 35 2.1.1 Processor Resource/Systems Manager . 35 2.1.2 IBM Dynamic Partition Manager . 35 2.2 Choosing a z/VM installation method . 36 2.2.1 Understanding traditional and upgrade installations . 36 © Copyright IBM Corp. 2015, 2016, 2021. All rights reserved. iii 2.2.2 Classifications used in this book . 37 2.2.3 New and upgrade installations to DASD. 37 2.2.4 Installing as VMSSI with live guest relocation. 38 2.2.5 Planning aids . 40 2.3 Bill of materials . 40 2.3.1 Hardware . 40 2.3.2 Software . 41 2.3.3 Networking . 42 2.4 Disk planning. 43 2.4.1 Primary considerations . 43 2.5 HiperDispatch planning . 48 2.6 Storage planning . 48 2.6.1 z/VM 7.2 initial installation and migrations considerations . 48 2.6.2 Storage allocation . 49 2.6.3 Global aging list . 50 2.7 Paging . 50 2.7.1 Recommendations, tips, and hints . 50 2.7.2 Calculating paging space . 51 2.8 Passwords and passphrases . 52 2.9 Network . 53 2.9.1 Involvement of stakeholders . 53 2.9.2 Open Systems Adapters . 54 2.9.3 Network attachment options and considerations . 54 2.9.4 Maximum transmission unit size matters . 55 2.9.5 IBM HiperSockets . 56 2.9.6 IPv4 and IPv6 . ..