What is Server Virtualization?
                     WHAT IS SERVER 
VIRTUALIZATION?
INTRODUCTION
Server virtualization is the process of 
dividing a physical server into multiple 
unique and isolated virtual servers by means 
of a software application. Each virtual server 
can run its own operating systems 
independently.
Source: www.vmware.com
KEY BENEFITS
Higher server ability
Cheaper operating costs
Eliminate server complexity
Increased application performance
Deploy workload quicker
Source: www.vmware.com
FULL 
VIRTUALIZATION
Full virtualization uses a hypervisor, a type 
of software that directly communicates with 
a physical server's disk space and CPU. The 
hypervisor monitors the physical server's 
resources and keeps each virtual server 
independent and unaware of the other 
virtual servers.
Source: www.vmware.com
PARA-
VIRTUALIZATION
Unlike full virtualization, para-virtualization 
involves the entire network working together 
as a cohesive unit.
Source: www.vmware.com
OS-LEVEL 
VIRTUALIZATION
Unlike full and para-virtualization, OS-level 
visualization does not use a hypervisor. 
Instead, the virtualization capability, which 
is part of the physical server operating 
system, performs all the tasks of a 
hypervisor.
Source: www.vmware.com
WHY SERVER 
VIRTUALIZATION?
Server virtualization is a cost-effective way 
to provide web hosting services and 
effectively utilize existing resources in IT 
infrastructure. Without server virtualization, 
servers only use a small part of their 
processing power.
Source: www.vmware.com
INDEPENDENT 
RESTART
In Server Virtualization, each server can be 
restart independently and does not affect 
the working of other virtual servers.
Source: www.vmware.com
LOW COST
Server Virtualization can divide a single 
server into multiple virtual private servers, 
so it reduces the cost of hardware 
components.
Source: www.javatpoint.com
DISASTER 
RECOVERY
Disaster Recovery is one of the best 
advantages of Server Virtualization. In 
Server Virtualization, data can easily and 
quickly move from one server to another 
and these data can be stored and retrieved 
from anywhere.
Source: www.javatpoint.com
DISADVANTAGES OF 
SERVER 
VIRTUALIZATION
The biggest disadvantage of server 
virtualization is that when the server goes 
offline, all the websites that are hosted by 
the server will also go down.
There is no way to measure the performance 
of virtualized environments.
It requires a huge amount of RAM 
consumption.
It is difficult to set up and maintain.
Source: www.javatpoint.com