Topics in Virtualization and Cloud Computing Dr Balwinder Singh Sodhi July, 2017 Preface Virtualization and Cloud Computing are vast areas of study. Though there are several excellent reference books on these topics, most of them tend to have a narrow focus. In this book, I have tried to compile those Virtualization and Cloud Computing topics which are necessary to gain an in-depth understanding of the internals of these two important technologies. A majority of the topics in this book have been taken from the content which is freely available on the Web under a permissive license. Balwinder Singh Sodhi Ropar PB India 140001 Licensing Notice This book is released under CC BY-SA License: https://creativecommons.org/licenses/by-sa/3.0/ ​ Contents 1 Virtualization 1 2 Hardware virtualization 7 3 Full virtualization 13 4 Paravirtualization 16 5 Hypervisor 18 6 Hardware-assisted virtualization 23 7 Emulator 26 8 Snapshot (computer storage) 37 9 Migration (virtualization) 40 10 Operating-system-level virtualization 42 11 Application virtualization 45 12 Portable application 49 13 Memory virtualization 53 14 Storage virtualization 57 15 Network virtualization 66 16 Software-defined networking 69 17 Network Functions Virtualization 78 18 Cloud computing 82 19 Elasticity (cloud computing) 98 20 Platform as a service 101 21 Software as a service 105 “” 22 Cloud computing issues 112 23 Cloud computing comparison 121 Chapter 1 Virtualization Virtualization 1.1 Hardware virtualization • • • “ “ ” ” 1.1.1 Snapshots 1.1.2 Migration 1.1.