The document provides an overview of server virtualization, highlighting its benefits such as server consolidation, failure recovery, and simple management. It focuses on Citrix XenServer, detailing its features, comparison to VMware ESXi, and the architecture of its hypervisor. The presentation emphasizes the flexibility of running multiple operating systems and the advantages of resource balancing and security in a virtualized environment.

1. Introducing XenServerStephen Rice (Lead Software Engineer)June 2010

2. What is server virtualization?What benefits does it have?Citrix XenServer in detailTaking a look at the feature listAgenda

3. Server virtualization enables multiple virtual machines to run on a single physical server.

4. Almost any operating system you want.Q. What can you run as a virtual machine?Windows (XP, Vista, 7, 2000, 2003, 2008…)Linux (RHEL, SLES, Debian, Centos, Oracle…)Many more community supported guests

5. CPU, MemoryDisks(storage)NetworksWhat does a virtual machine need?Shared StoragePool

6. zzzNon Virtualzzz

7. Virtualization

8. Server consolidationFailure recoverySecurity and sandboxingResource balancingBackup, restore and cloneSimple managementBenefits of Virtualization

9. Server consolidationBenefits of VirtualizationServer power consumption

10. Server cooling costs

11. Space requirements

12. Hardware maintenancecostsFailure recoveryBenefits of VirtualizationHigh availability

13. Snapshot and restoreSecurity and sandboxingBenefits of VirtualizationMalicious code

14. Legacy testing

15. Upgrade previewResource balancingBenefits of VirtualizationConsolidate in periods of low demand

16. Spread out for periods of high demand

17. Monitor and adapt to changing requirementsBackup, restore and cloneBenefits of VirtualizationRapid deployment of new setups

18. Extend existing capabilities

19. Simplify staging to production transitionSimple managementBenefits of VirtualizationManage workloads from a single console

20. Organizational tools

21. At a glance status reportsServer consolidationFailure recoverySecurity and sandboxingResource balancingBackup, restore and cloneSimple managementBenefits of Virtualization

22. Citrix XenServer in detailHypervisorHypervisorOSHardwareHardwareHardwareNormal ServerType 2 HypervisorType 1 HypervisorSingle operating system that has direct access to the underlying hardware.Host OS has access to the hardware and runs a hypervisor which manages the VMs. E.g. VMWare Server

23. Security and performance trade offHypervisor controls access to the hardware for all guests VMs. E.g. XenServer, VMWareESXi

24. ‘Bare metal’ performanceCitrix XenServer in detailOpen source Xen/ Open sourceXenServer

25. Privileged VM called Domain 0

26. Gives commands to the hypervisor

27. Coordinates networking/storage

28. Communicates with external clients

29. XenCenter, Workload Balancing Server, Active Directory e.t.cCitrix XenServer compared to VmwareESXiEstablished server virtualization company

30. Extra server to manage database (Single POF)

31. Binary translation performance cost

32. Mature feature list

33. High costESXiESXiESXivCenter

34. Citrix XenServer compared to VmwareESXiMasterEach server keeps a copy of the database