2. Agenda
Introduction to Virtualization and Server
Virtualization
Comparing with and without virtualization
Virtual server concept
Benefit of server virtualization
Limitation of server virtualization
4. What is Virtualization
Server virtualization
Creates multiple isolated environments
Allows multiple OS’s and workloads to run on
the same physical hardware
Virtualization basically allows one computer
to do the job of multiple computers, by sharing
the resources of a single hardware across multiple
environments.Version of virtualization such as
hardware platform,operating system,storage
device , network resources and server
virtualization.
Virtualization Layer
Virtual
Container
App. A App. B
Hardware
Virtual
Container
App. C App. D
6. The Traditional Server Concept
Old Model:
Traditional x86 Architecture
• Single OS image per machine
• Software and hardware tightly
coupled
• Multiple applications often
conflict
Old model is challenging!
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7. Comparison between with and
without virtualization
With VirtualizationWithout Virtualization
VMware provides hardware virtualization that presents a complete
x86 platform to the virtual machine
Allows multiple applications to run in isolation within virtual machines
on the same physical machine
Virtualization provides direct access to the hardware resources to
give you much greater performance
8. The Virtual Server Concept
Hardware independence
–Guest VM sees the same hardware
regardless of the host hardware
Isolation
–VM’s operating system is isolated
(different) from the host operating
system
Encapsulation
–Entire VM encapsulated into a single
file
Virtual machines provide:
9. Benefits of Virtualization
Increased hardware utilization
Server consolidation
Decreased provisioning times
Load-Balancing
Improved security
Software Development
Testing / Quality Assurance
Training
Disaster Recovery
15. The Disadvantages of Virtualization
o Increase complexity of IT environment
o Physical failures become “serious”
o Performance Testing
o Hardware compatibility Testing
o Specific Hardware Requirements
o -custom hardware devices
o Resource-intensive application
o -VMs may have RAM/CPU Limitations
