This document discusses server virtualization. It begins by defining server virtualization and describing the key approaches: virtual machine model, para-virtual machine model, and virtualization at the OS layer. Benefits of server virtualization include reduced costs, improved resource utilization, increased availability, and tools to enhance security. Server virtualization can be used for server consolidation, multiple OS/application support, disaster recovery, and centralizing administration. It concludes by discussing future applications of server virtualization like establishing large organizations at low cost and improving data security.

1. Presented by:
Abhinav Saxena(0716510004)
Ajay Singh(0716510005)
Akanksha Shukla(0716510006)
Akhilesh Kumar Jha(0716510007)
Amarish Pal(0716510008)

2.  Introduction
 Server
 Virtualization
 General Virtualization Concept
 Approaches to Server Virtualization
 The Virtual Machine Model
 Para Virtual Machine Model
 Virtualization at OS layer
 Virtualization benefits
 X86 Server Virtualization Basics
 Server Virtualization scenarios
 Disaster Recovery
 Implementation
 Future Scope
 Scope of Virtualization
 References
2

3. A Server is a computer
program that provides
services to other computer
programs (and their users) in
the same or other
computers.
Virtualization is a
method of running multiple
independent virtual operating
systems on a single physical
computer. It is a way of
maximizing physical
resources to maximize the
investment in hardware. Fig 1:A general server
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4. Fig 2:A General Virtualization concept
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5. Server
virtualization is the
masking of server
resources,
including the
number and
identity of
individual physical
servers, processors,
and operating
systems, from
server users.
Fig 3: Virtual Server
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6. There are three popular approaches to server
virtualization:
The virtual machine model,
 The paravirtual machine model, and
 Virtualization at the operating system (OS) layer.
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7. Virtual machines are based on the host/guest
paradigm. Each guest runs on a virtual imitation of the
hardware layer. This approach allows the guest
operating system to run without modifications. It's not
running on real hardware. It uses a hypervisor to
coordinate instructions to the CPU. The hypervisor is
called a virtual machine monitor (VMM).
VMware and Microsoft Virtual Server both use
the virtual machine model.
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8. Fig 4: Virtual Machine Model
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9. The paravirtual machine (PVM) model is
also based on the host/guest paradigm. The
VMM actually modifies the guest operating
system's code. This modification is called
porting. Porting supports the VMM so it can
utilize privileged systems calls sparingly.
Xen and UML both use the paravirtual
machine model.
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10. Fig 5:Para Virtual Machine
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11. Virtualization at the OS level works a little
differently. It isn't based on the host/guest paradigm.
In the OS level model, the host runs a single OS
kernel as its core and exports operating system
functionality to each of the guests.
Virtuozzo and Solaris Zones both use OS-
level virtualization.
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12. Fig 6:Virtualization at the
operating system (OS) layer 12

13.  Reduces administrative efforts
◦ Lowers operational costs
 Fewer servers to manage
◦ Speeds deployment
 Now 1-6 weeks (requisition, setup, software, test)
 Virtual reduces this to hours
 Reduced hardware and infrastructure costs
 Improves resource utilization
 Increases availability
 Tools to enhance security
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14. 14

15.  Server consolidation
 Multiple OS & application support
 Lab and deployment testing
 Help desk
 Application isolation
 Security
 Disaster recovery
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16. 16
Fig 7: Disaster Recovery

17.  Fewer servers to manage and recover/restore
◦ Reduces costs
 Server VMs are hardware independent
◦ Can be restored to other platforms
◦ No need to match primary site and secondary site
hardware
 VMs are encapsulated
◦ Faster
◦ Can be replicated between sites
◦ No need for bare-metal installs
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18.  Physical-to-VM recovery
◦ Restore physical backup to running VM
◦ Lower costs – no need for 1-to-1 physical servers
 VM-to-VM recovery
◦ Protects against operating system/application failure
◦ Recover failed VM on another server
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19. Server virtualization can be viewed as part of an
overall virtualization trend in enterprise IT that
includes storage virtualization, network virtualization,
and workload management. Server virtualization can
be used to eliminate server sprawl, to make more
efficient use of server resources, to improve server
availability, to assist in disaster recovery, testing and
development, and to centralize server administration.
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20. Server Virtualization is the perfect solution for
applications that are meant for small- to medium-scale
usage. Munich - Fujitsu announced a new initiative aimed
at helping small and mid-size businesses (SMBs) take
advantage of the business-boosting benefits of switching
to server virtualization. ‘My Very First Hyper-V’
combines hardware and software components to provide
an affordable, easy-to-manage entry point to server
virtualization, offering SMBs significantly-reduced fixed
and operational costs, as well as increased system
flexibility and availability.
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21.  Establishment of large organization will not cost too much
due to deployment of virtual servers.
 Data security issues will be fixed easily by storing the data
on the virtual servers.
 As in the data communication process there will be only one
physical server so traffic load will be reduced.
 Time paid to recovery of data in disaster situations like
system or server crash will be reduced.
 Productivity of the organization will be increased.
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22. 1. Server Virtualization is the masking of server resources,
including the number and identity of individual physical servers,
processors, and operating systems, from server users.
2. There are three popular approaches to server virtualization:
The Virtual machine model, The Para virtual machine model,
and Virtualization at the operating system (OS) layer.
3. Benefits of Server Virtualization are reduction of administrative
efforts, Lowering operational costs, reduced hardware and
infrastructure costs,
Tools to enhance security and disaster recovery.
4. As in the data communication process there will be only one
physical server so traffic load will be reduced.
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23.  http://www.wikipedia.org
 http://www.infoclipz.com
 Figures & videos:- http://www.youtube.com
 “The Best Damn Server Virtualization Book
Period” by Rogier Dittner and David Rule Jr.
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24. Queries
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25. Thanking to you
all......
-Abhinav Saxena
-Ajay Singh
-Akanksha Shukla
-Akhilesh Kumar Jha
-Amarish Pal 25