A presentation Perumal on Server virtualization

1. 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.”

6. Typical Server Model

7. Virtualized Server Model

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