1. Virtualization - an introduction Gordon Ross Computing Service

2. What is virtualization ? “The simulation of the software and/or hardware upon which other software runs.” http://en.wikipedia.org/wiki/Virtualisation

3. 3 Why virtualization ? Obsolete hardware/software Consolidation/Efficiency Easier Management Availability Online Hardware Upgrade Test/Dev/Proof-of-Concept 3

4. 4 Why not virtualize ? Cost Hardware Software Complexity Speed Availability Licensing 4

5. 5 Key Terms Virtualisation Software Hypervisor Guests Host

6. 6 Types of virtualization Full Virtualization Guest operating system runs unmodified Para-virtualization Requires guest operating system modification Containers Can only run guests using the same kernel Guest isolation... 6

7. 7 Virtualization Methods Emulation Type 2 Type 1 Hardware assisted 7

8. 8 Virtualization Software VMWare Xen Hyper-V KVM Domains/Containers Desktop (Workstation, Parallels, VirtualBox, Virtual PC, XP Mode) 8

9. 9 VM Migration

10. 10 VM Migration - Requirements Network Shared Storage iSCSI, NFS, FC or not ! CPU Compatibility AMD/Intel, AMD-V/VT, Windows HAL Management System Money... 10

11. 11 High Availability Virtualization VM Crashes Server Outages Load Balancing 11

12. 12 Virtual Machine Management Backups Snapshots Templates & Clones But don’t get trigger happy... Resource Management O/S & Data separation 12

13. 13 Gotchas Time Network MAC Addresses Batch Jobs Patching Management Software DNS & Windows Domains Disc 13