Server virtualization
- 2. Presentation Overview • What is Virtualization • Problem Assessment - Why Virtualization? • Server Virtualization • Typical Server Model • Virtualized Server Model • Hypervisor • Types of Hypervisor • Native Hypervisor (Type I) • Hosted Hypervisor (Type II) • Warnings about Hosted Hypervisor • Advantages of Virtualization • Marketplace Offerings
- 3. What is Virtualization • “Virtualization is the creation of a virtual (rather than actual) version of something, such as an operating system, a server, a storage device or network resources.”
- 4. Problem Assessment - Why Virtualization? • Each physical hardware for each server • High Cost • Power consumption • Down Time of a server • Machine Crashing • High Infrastructure • Less Utilization of resource
- 5. Server Virtualization • “Server virtualization in general terms lets you take a single physical device and install (and run simultaneously) two or more OS environments that are potentially different and have different identities, application stacks, and so on.”
- 8. Hypervisor • Hypervisor or Virtual Machine Monitor (VMM) is a computing layer which allows multiple operating systems to run on a host computer at the same time. • Originally developed in the 1970s as part of the IBM
- 9. Types Of Hypervisors • Native Hypervisor (Type I) • Hosted Hypervisor (Type II)
- 10. Native Hypervisor (Type I) • Able to install more than one OS in a virtual server • Copy the OS from one virtual server to another easily • Over allocation of memory than the available memory in physical server
- 11. Hosted Hypervisor (Type II)
- 12. Warnings about Hosted Hypervisor • Here over allocation of memory is not possible
- 13. Advantages of Virtualization • Zero downtime maintenance • Dynamic resource sharing • Low maintenance cost • Backups, and automated restoration
- 14. Market Place Offerings Freely Available Commercial • OpenVZ (Open Source) • Virtuozzo • VMWare Server (GSX) • VMWare ESX • Xen 3.0 (Open Source) • Xen Enterprise • Microsoft Virtual Server • Virtual Iron
- 15. Summary • Virtualization offers major savings in data center operations • Reductions in the costs of managing data centers • Virtualization offers back-up and high availability services • Cloud computing uses the virtualization as its main component