SPPU_TE_COMPUTER_CLOUD_COMPUTING_unit 3.pptx

“Virtualization in Cloud
Computing”
.
Prepared By
Prof. S.B. Dhadake
(Assistant Professor)
Computer Engineering Departement
CLASS : TE COMPUTER 2019
SUBJECT : CC (SEM-II)
UNIT : III

SYLLABUS
Introduction: Definition of Virtualization, Adopting Virtualization,
Types of Virtualization, Virtualization Architecture and Software,
Virtual Clustering, Virtualization Application, Pitfalls of
Virtualization. Grid, Cloud and Virtualization: Virtualization in
Grid, Virtualization in Cloud, Virtualization and Cloud Security.
Virtualization and Cloud Computing: Anatomy of Cloud
Infrastructure, Virtual infrastructures, CPU Virtualization, Network
and Storage Virtualization

Virtualization in Cloud Computing
Virtualization is the "creation of a virtual (rather than actual)
version of something, such as a server, a desktop, a storage device,
an operating system or network resources".
In other words, Virtualization is a technique, which allows to share
a single physical instance of a resource or an application among
multiple customers and organizations. It does by assigning a logical
name to a physical storage and providing a pointer to that physical
resource when demanded.

Basic Terminologies for Virtualization
Virtual machine: A virtual machine can be defined as the
computer of a virtual type that operates beneath a
hypervisor.
Hypervisor: This can be defined as the operating system
that runs on actual hardware. A virtual counterpart of the
operating system is a subpart that executes or emulates the
virtual process. They are defined as Domain 0 or Dom0.

Basic Terminologies for Virtualization
Container: These can be defined as virtual machines of lightweight nature
that are a subset of the same operating system instance or the hypervisor. They
are a collection of processes that executes along with corresponding
namespace or identifiers of process.
Virtual network: This is defined as the network being separated logically and
is present inside the servers. Such networks can be expanded across multiple
servers.
Virtualization software: This type of software helps deploy Virtualization on
the computer device.

What is the concept behind the Virtualization?
Creation of a virtual machine over existing operating system and
hardware is known as Hardware Virtualization. A Virtual machine
provides an environment that is logically separated from the
underlying hardware.
The machine on which the virtual machine is going to create is
known as Host Machine and that virtual machine is referred as a
Guest Machine

Benefit of Virtualization in Cloud Computing
1. More flexible and efficient allocation of resources.
2. Enhance development productivity.
3. It lowers the cost of IT infrastructure.
4. Remote access and rapid scalability.
5. High availability and disaster recovery.
6. Pay peruse of the IT infrastructure on demand.
7. Enables running multiple operating systems

Drawback of Virtualization in Cloud Computing
1. The transition of the existing hardware setup to a virtualized
setup requires an extensive time investment, and hence this can
be regarded as a time-intensive process.
2. There is a lack of availability of skilled resources that helps in
terms of transition of existing or actual setup to virtual setup.
3. Since there is a limitation in terms of having less skilled
resources, the implementation of Virtualization calls for high-
cost implementations.
4. If the transition process is not handled meticulously, it also
poses a security risk to sensitive data.

Types of Virtualization
1. Hardware Virtualization.
2. Operating system Virtualization.
3. Server Virtualization.
4. Storage Virtualization.
1) Hardware Virtualization:
When the virtual machine software or virtual machine manager (VMM)
is directly installed on the hardware system is known as hardware
virtualization.
The main job of hypervisor is to control and monitoring the
processor, memory and other hardware resources.
After virtualization of hardware system we can install different
operating
system on it and run different applications on those OS.
Usage:
Hardware virtualization is mainly done for the server platforms,

2) Operating System Virtualization:
When the virtual machine software or virtual machine manager (VMM) is
installed on the Host operating system instead of directly on the hardware
system is known as operating system virtualization.
Usage:
Operating System Virtualization is mainly used for testing the applications on
different platforms of OS.

3) Server Virtualization:
When the virtual machine software or virtual machine manager (VMM) is
directly installed on the Server system is known as server virtualization.
Usage:
Server virtualization is done because a single physical server can be divided
into multiple servers on the demand basis and for balancing the load.

4) Storage Virtualization:
Storage virtualization is the process of grouping the physical storage
from
multiple network storage devices so that it looks like a single storage device.
Storage virtualization is also implemented by using software applications.
Usage:
Storage virtualization is mainly done for back-up and recovery purposes.

How does virtualization work in cloud computing?
Virtualization plays a very important role in the cloud computing technology,
normally in the cloud computing, users share the data present in the clouds like
application etc, but actually with the help of virtualization users shares the
Infrastructure.
The main usage of Virtualization Technology is to provide the applications
with the standard versions to their cloud users, suppose if the next version of
that application is released, then cloud provider has to provide the latest
version to their cloud users and practically it is possible because it is more
expensive.
To overcome this problem we use basically virtualization technology, By using
virtualization, all severs and the software application which are required by
other cloud providers are maintained by the third party people, and the cloud
providers has to pay the money on monthly or annual basis.

Virtualization Architecture and Software

A virtualization architecture is a conceptual model specifying the
arrangement and interrelationships of the particular components
involved in delivering a virtual -- rather than physical -- version of
something, such as an operating system (OS), a server, a storage
device or network resources.

Virtualization is commonly hypervisor-based. The
hypervisor operating systems and applications
from the underlying
isolates
computer
hardware so the host machine can run multiple virtual machines (VM) as
guests that share the system's physical compute resources, such as
processor cycles, memory space, network bandwidth and so on.
Type 1 hypervisors, sometimes called bare-metal hypervisors, run
directly on top of the host system hardware. Bare-metal hypervisors offer
high availability and resource management. Their direct access to
system hardware enables better performance, scalability and stability.
Examples of type 1 hypervisors include Microsoft Hyper-V, Citrix
XenServer and VMware ESXi.

A type 2 hypervisor, also known as a hosted hypervisor, is installed on
top of the host operating system, rather than sitting directly on top of the
hardware as the type 1 hypervisor does. Each guest OS or VM runs
above the hypervisor. The convenience of a known host OS can ease
system configuration and management tasks. However, the addition of a
host OS layer can potentially limit performance and expose possible OS
security flaws. Examples of type 2 hypervisors include VMware
Workstation, Virtual PC and Oracle VM VirtualBox.

The main alternative to hypervisor-based virtualization is
containerization. Operating system virtualization, for example, is a
container-based kernel virtualization method. OS virtualization is similar
to partitioning. In this architecture, an operating system is adapted so it
functions as multiple, discrete systems, making it possible to deploy and
run distributed applications without launching an entire VM for each
one. Instead, multiple isolated systems, called containers, are run on a
single control host and all access a single kernel.

Software Virtualization
Software Virtualization is a technique that allows one computer server
to work with more than one virtual system.
The primary function of software Virtualization is to develop virtual
Software and make the work easier. It produces a simple virtual machine
on which the system can work as regularly.
Software Virtualization: It is precisely the same as the virtualization
bit. It is capable of abstracting the software installation procedure and
building virtual software installations.
Virtualized Software: Basically, it is a program installed inside its self-
contained unit.

Software Virtualization
The concept behind Software Virtualization
Software Virtualization will build a virtual environment and allows the
user to use more than one Operating System.
Suppose the user wants to use Windows and Linux at the same time.
Virtualization can help build a virtual environment, and it will enable the
use of more than one Operating System.

Types of Software Virtualization
1. OS Virtualization
In OS Virtualization, more than the Operating system wants to work
individually to complete the task without affecting others. Thus, a particular
Operating system can perform its specified job.
2. Application Virtualization
Application Virtualization is the second Virtualization method where users can
remotely access their applications on the central server. It helps to run multiple
applications at the same time by building a virtual environment.
3. Service Virtualization
Service Virtualization is a technique to simulate the Behaviors of components
in the form of combination component-based applications.

Benefits of Software Virtualization
1. Time-Saving
Software Virtualization helps organizations to complete the task efficiently, and
also it helps to save time.
2. Quick Changes
The user is capable of making quick changes in the Software according to the
requirements. According to the demand, the Software can be altered and run.
3. High Security
The Software can be kept secure from any viruses and security attacks as the
firewall is available as a bodyguard and prevents from entering the viruses.
Thus the resided data remains highly secure. are minimal.

Benefits of Software Virtualization
4. Effective Utilization
With the help of Software Virtualization, the available resources are used best
by building a virtual environment. It results in making use of multiple
operating systems in one computer.
5. Easy Manage
Managing updates is a simple task. The user can update applications at one
location and deploy the updated virtual applications to all client systems.
6. Software Migration
In previous scenarios, getting switched from one platform to another was a
time-consuming and challenging task, impacting the end-user systems. But
with the help of Software Virtualization, the migration process is simplified.

Virtual Cluster in Cloud Computing
Virtual cluster is a many-to-one virtualization technology, which can form a
routing system from multiple common devices connected through a switching
network, while performing the same as a single logical router to all external
appearances.
Virtual clusters are built with VMs installed at distributed servers from one or
more physical clus-ters. The VMs in a virtual cluster are interconnected
logically by a virtual network across several physical networks. Figure 3.18
illustrates the concepts of virtual clusters and physical clusters. Each virtual
cluster is formed with physical machines or a VM hosted by multiple physical
clusters. The virtual cluster boundaries are shown as distinct boundaries

The provisioning of VMs to a virtual cluster is done dynamically to have
the following interest-ing properties:
• The virtual cluster nodes can be either physical or virtual machines.
Multiple VMs running with different OSes can be deployed on the same
physical node.
•A VM runs with a guest OS, which is often different from the host OS, that
manages the resources in the physical machine, where the VM is implemented.
•The purpose of using VMs is to consolidate multiple functionalities on the
same server. This will greatly enhance server utilization and application
flexibility.
• VMs can be colonized (replicated) in multiple servers for the purpose of
promoting distributed parallelism, fault tolerance, and disaster recovery

• The size (number of nodes) of a virtual cluster can grow or shrink dynamically, similar
to the way an overlay network varies in size in a peer-to-peer (P2P) network.
• The failure of any physical nodes may disable some VMs installed on the
failing
nodes. But the failure of VMs will not pull down the host system.

Virtualization
Application
Application virtualization is technology that allows users to access
and use an application from a separate computer than the one on
which the application is installed. Using application virtualization
software, IT admins can set up remote applications on a server and
deliver the apps to an end user’s computer. For the user, the
experience of the virtualized app is the same as using the installed
app on a physical machine

Virtualization
Application
How does it works?
The most common way to virtualize applications is the server-based
approach. This means an IT administrator implements remote
applications on a server inside an organization’s datacenter or via a
hosting service. The IT admin then uses application virtualization
software to deliver the applications to a user’s desktop or other
connected device. The user can then access and use the application as
though it were locally installed on their machine, and the user’s actions
are conveyed back to the server to be executed.
Application virtualization is an important part of digital workspaces and
desktop virtualization.

Virtualization
Application
Benefits of Application
Virtualization :
1. Simplified Management
2. Scalability
3. Security

Pitfalls of Virtualization
1. Capacity and costs fail to meet expectations.
2. Application fails to run (or fails to run adequately)
in a virtual environment.
3. Licensing cost increase and some software is not supported.
4. Managers, executives, users and other “server huggers” resist
virtualization.
5. Virtualization exposes unforeseen security risks.

Virtualization in Grid
The primary focus in Grid Computing lies in secure resource sharing in terms
of access to computers, software and data in a dynamic environment. Sharing
of those resources has to be ﬁne grained and highly controlled. Moreover,
Foster proposed a three point checklist which characterizes a Grid more in
detail:
• Delivery of nontrivial qualities of service;
• Usage of standard, open, general-purpose protocols and interfaces e.g. for
inter-communication;
• Coordination of resources that are not subject to centralized control.

Operating System virtualizations are just a use of software which allows the
hardware of a system to run multiple operating systems concurrently. This
further provides the benefit to run multiple applications requiring a different
operating system on a single computer.
How virtualization is different from Grid Computing?
Whereas a grid has many systems in a network and hence multiple people can
have ownership. Virtualization helps in providing cloud better security. Grid
computing is more economical. It splits the work and distributes it over the
network on computers increasing the efficiency as well

What is an example of virtualization?
Examples of virtualization in the IT world include: Running multiple Windows
VM servers on an Intel box, or running different IBM i, Linux, and
AIX
partitions on an IBM POWER machine are well known implementations of
server virtualization.
Why grid computing is required?
Grid computing enables the virtualization of distributed computing resources
suchas processing, network bandwidth,and storage capacity to create a single
system image, granting users and applications seamless access to vast IT
capabilities.

The virtual storage containers offer high performance cloud storage systems.
Logical Unit Number (LUN) of device, files and other objects are created in
virtual storage containers. Following diagram shows a virtual storage container,
defining a cloud storage domain:
Virtual Storage Container

Challenges :
1. Storing the data in cloud is not that simple task. Apart from its flexibility and
convenience, it also has several challenges faced by the customers. The
customers must be able to:
2. Get provision for additional storage on-demand.
3. Know and restrict the physical location of the stored data.
4. Verify how data was erased.
5. Have access to a documented process for disposing of data storage hardware.
6. Have administrator access control over data.
Virtual Storage Container

Virtualization and Cloud
Security
Virtualized security, or security virtualization, refers to security solutions
that are software-based and designed to work within a virtualized IT
environment. This differs from traditional, hardware-based network
security, which is static and runs on devices such as traditional firewalls,
routers, and switches.
In contrast to hardware-based security, virtualized security is flexible and
dynamic. Instead of being tied to a device, it can be deployed anywhere in
the network and is often cloud-based. This is key for virtualized networks,
in which operators spin up workloads and applications dynamically;
virtualized security allows security services and functions to move around
with those dynamically created workloads

Virtualization and Cloud
Security
Cloud security considerations (such as isolating multitenant environments
in public cloud environments) are also important to virtualized security.
The flexibility of virtualized security is helpful for securing hybrid and
multi-cloud environments, where data and workloads migrate around a
complicated ecosystem involving multiple vendors.

What are the benefits of virtualized security?
1. Cost-effectiveness: Virtualized security allows an enterprise to
maintain a secure network without a large increase in spending on
expensive proprietary hardware. Pricing for cloud-based virtualized
security services is often determined by usage, which can mean
additional savings for organizations that use resources efficiently.
2. Flexibility: Virtualized security functions can follow workloads
anywhere, which is crucial in a virtualized environment. It provides
protection across multiple data centers and in multi-cloud and hybrid
cloud environments, allowing an organization to take advantage of the
full benefits of virtualization while also keeping data secure.

What are the benefits of virtualized security?
3. Operational efficiency : Quicker and easier to deploy than hardware-
based security, virtualized security doesn’t require IT teams to set up
and configure multiple hardware appliances. Instead, they can set up
security systems through centralized software, enabling rapid scaling.
Using software to run security technology also allows security tasks to
be automated, freeing up additional time for IT teams.
4. Regulatory compliance : Traditional hardware-based security is static
and unable to keep up with the demands of a virtualized network,
making virtualized security a necessity for organizations that need to
maintain regulatory compliance.

How does virtualized security work?
Virtualized security can take the functions of traditional security hardware appliances (such as
firewalls and antivirus protection) and deploy them via software. In addition, virtualized
security can also perform additional security functions. These functions are only possible due to
the advantages of virtualization, and are designed to address the specific security needs of a
virtualized environment.
For example, an enterprise can insert security controls (such as encryption) between
the
application layer and the underlying infrastructure, or use strategies such as micro-segmentation
to reduce the potential attack surface.
Virtualized security can be implemented as an application directly on a bare metal hypervisor (a
position it can leverage to provide effective application monitoring) or as a hosted service on a
virtual machine. In either case, it can be quickly deployed where it is most effective, unlike
physical security, which is tied to a specific device.

How is physical security different from virtualized security?
Traditional physical security is hardware-based, and as a result, it’s inflexible
and static. The traditional approach depends on devices deployed at strategic
points across a network and is often focused on protecting the network
perimeter (as with a traditional firewall). However, the perimeter of a
virtualized, cloud-based network is necessarily porous and workloads and
applications are dynamically created, increasing the potential attack surface.
Traditional security also relies heavily upon port and protocol filtering, an
approach that’s ineffective in a virtualized environment where addresses and
ports are assigned dynamically. In such an environment, traditional hardware-
based security is not enough; a cloud-based network requires virtualized
security that can move around the network along with workloads and
applications

What are the different types of virtualized security?
Segmentation, or making specific resources available only to specific applications and users.
This typically takes the form of controlling traffic between different network segments or tiers.
Micro-segmentation, or applying specific security policies at the workload level to create
granular secure zones and limit an attacker’s ability to move through the network. Micro-
segmentation divides a data center into segments and allows IT teams to define security controls
for each segment individually, bolstering the data center’s resistance to attack.
Isolation, or separating independent workloads and applications on the same network. This is
particularly important in a multitenant public cloud environment, and can also be used to isolate
virtual networks from the underlying physical infrastructure, protecting the infrastructure from
attack.

Cloud Security
Cloud security, also known as cloud computing security, is a
collection of security measures designed to protect cloud-based
infrastructure, applications, and data. These measures ensure user
and device authentication, data and resource access control, and data
privacy protection. They also support regulatory data compliance.
Cloud security is employed in cloud environments to protect a
company's data from distributed denial of service (DDoS) attacks,
malware, hackers, and unauthorized user access or use.

Cloud Security
Planning of security in Cloud Computing :
As security is a major concern in cloud implementation, so an organization have
to plan for security based on some factors like below represents the three main
factors on which planning of cloud security depends.
• Resources that can be moved to the cloud and test its sensitivity risk
are picked.
• The type of cloud is to be considered.
• The risk in the deployment of the cloud depends on the types of cloud and
service models.

Types of Cloud Computing Security
There are 4 types of cloud computing security controls i.e.
1. Deterrent Controls : Deterrent controls are designed to block nefarious
attacks on a cloud system. These come in handy when there are insider
attackers.
2. Preventive Controls : Preventive controls make the system resilient to
attacks by eliminating vulnerabilities in it.
3. Detective Controls : It identifies and reacts to security threats and control.
Some examples of detective control software are Intrusion detection
software and network security monitoring tools.
4. Corrective Controls : In the event of a security attack these controls are
activated. They limit the damage caused by the attack.

Importance of Cloud Security
• Centralized security : Centralized security results in centralizing protection.
As managing all the devices and endpoints is not an easy task cloud security
helps in doing so. This results in enhancing traffic analysis and web filtering
which means less policy and software updates.
• Reduced costs : Investing in cloud computing and cloud security results in
less expenditure in hardware and also less manpower in administration.
• Reduced Administration : It makes it easier to administer the organization
and does not have manual security configuration and constant security
updates.
• Reliability : These are very reliable and the cloud can be accessed
from

Virtualizatio
n and
Cloud
Computing

Anatomy of Cloud Infrastructure
Cloud computing is changing itself to meet the demands of customers in terms
of software and hardware. These changes have benefitted developments in web-
based applications and facilitated decisions-making in business.
Thomas J. Watson of IBM has said ‘there may be a demand for five in world
market for computers.’ IBM designed computers for 20 companies, expecting to
get orders only from five companies. Surprisingly, IBM got order for 18
companies for the IBM 701 system. Operations in terms of hardware and data
are the main players and they are not cost effective. Cloud’s on-demand
infrastructure will make it cheaper and efficient.

Microsoft and Google are the new players using cloud computing technology.
Microsoft’s Windows Azure platform will provide best results for C# and
ASP.Net development. Google’s App Engine and its Python language has
powered distributed web applications.
The most famous cloud computing provider is Amazon’s EC2. AMI (Amazon
Machine Image) is the block used in EC2 virtualization and is the point of
interaction to users of Amazon’s EC2.

1. Cloud Stack :
Infrastructure stack for delivering web applications
by the providers of cloud computing. Figure shows
the managed cloud stack consisting of two parts:
first part consists of cache, dynamic code and
attached storage and logic for the dynamic code;
second part consists of stable and efficient OS,
security features and business logic written using
some programming language. Cloud computing
environment separates the computing environment
away from the developers and helps them focus on
improving their application.

1. Cloud Stack :
Every cloud platform includes a virtual machine language and a gateway for
web services. Language functions are closely linked with parent OS and their
native libraries are taken away. External tools and ordinary compilers will not
function in the cloud language layer. Cloud services always bundles language
runtime dynamically for efficient interpretation across many application
instances.
Dynamic applications resides in application state and logic through database
and file storage. In cloud computing, the database and the file server are placed
inside cloud services, which are operated in an isolated and specialized layer.
This isolation layer makes the storage layer inter-changeable from cloud stack.

1. Cloud Stack :
Static files are categorized based on their size. Files <1 MB can be consumed
in a single request. File >1 MB need to be chopped into parts for an easier and
sequenced download. Static cloud storage can be broken up according to their
file size and type, thus providing best solution for storage and delivery.

2. Cloud Consumers :
Web Application Developers
New small web applications may experience exponential growth. Web
developers use cloud computing stack for faster web performance and their
applications. Enterprise applications have deployed different cloud models.
SMBs and large-sized IT companies are replacing their in-house maintenance
and relying on IaaS. Project management, employee tracking, payroll and some
common functions are deployed as SaaS.
Windows Azure, Salesforce’s Force.com and Google App Engine has strong
support for back office add-ons. Microsoft and Google support Exchange
Online and Google Apps, respectively. Force.com tied to the popular Salesforce
CRM application for sales and marketing teams.
Companies such as Aptana, CohesiveFT, RightScale are some examples for
cloud hosting providers.

Virtual Infrastructure
In the present scenario, the Internet provides services such as research, mining,
e-mail and maps. In the near future, it will converge communication and
computation as a single service.
Hence the Internet cannot be considered as a huge shared and unreliable
communication enabling data exchanges between users. Instead, it will become
a pool of interconnected resources that can be shared.
Grid’5000, an experimental facility, gathers clusters and gives access to nearly
5,000 CPUs distributed over remote sites and inter-connected by super fast
networks.

Virtual Infrastructure
Virtualization abstracts services and physical resources. It simplifies the job of
managing the resources and offers a great flexibility in resource usage.
The vitrual machine
• Provides an environment where non-trusted applications can be run
• Adopts isolation techniques
• Allows dynamic deployment of application (portability)
• Applied optimization in OS
• Manages as a single service

CPU Virtualization
Virtualizing a CPU is an easy job. For virtualizing a CPU, the following points
are to adhered:
• Privileged instructions runs only in privileged
mode.
•
Control sensitive instructions that tend to change memory mappings,
communicating with other devices.
• Behavior-sensitive instructions that tend to change resource configuration.
By adopting CPU virtualization, two separate CPUs resemble a single CPU,
i.e., two systems running in a single system. By adopting this concept, user can
run two OS in a single system. The most important part of the computer is the
central processing unit(CPU).

CPU Virtualization
The main objective of CPU virtualization is to make a CPU function similar to
that of two separate CPUs. CPU virtualization allows the users to run different
operating systems simultaneously. For example, Apple Mac can be virtualized
to run Windows as well.
CPU virtualization is not multitasking or multi-threading. Multitasking is
concept of running multiple applications at a time. Multi-threading is where
more than one CPUs can run applications in a way that carries out two actions
at the same time.

Network and Storage Virtualization
running of multiple networks,
multiple
1. Network Virtualization :
Network virtualization
facilitates consumers over a
shared substrate.
Network virtualization is a method which combines the available resources by
splitting up the bandwidth into channels and assigned to device or user in real
time. Each channel is independently secured. Every consumer will have shared
access to all the resources on the network.
By adopting network virtualization, managing the network will be an easier job
and less time-consuming for network administrators. Productivity and
efficiency are improved using network virtualization. Files, images, programs
and folders can be managed centrally.

Storage media such as hard drives and tape drives can be added, removed and
shared easily. Network virtualization is categorized as: external and internal.
External format: In this format, multiple local networks are combined or
subdivided into virtual networks to improve the efficiency. VLAN and network
switch are the components of this format.
Internal format: In this format, a single system is configured with containers
or hypervisors, such as the Xen/KVM domain to control VNIC. By adopting
this format, overall efficiency of a single system is improved since applications
are isolated.

Components of a virtual network consists of:
• Network hardware components such as network switch, adapters (NIC)
• Network elements e.g., firewalls
• VLANs and VMs
• Network storage devices
• Network mobile elements e.g., tablets, mobiles
• Network media e.g., ethernet cards and fibre channels

2. Storage Virtualization
1. Storage virtualization is a concept where storage devices are virtualized. As
a result of this concept better functionality, proper maintenance of storage
devices and efficient backup procedures can be achieved.
2. A storage system is also called as storage array or disk array. Storage
systems are complex and are controlled by special systems providing high
data protection for the data stored in it.
3. There are two types of storage virtualization : block virtualization and file
virtualization.

2. Storage Virtualization :
• Block virtualization separates the logical storage from physical storage.
Accessing can be done without the knowledge of where the physical storage
is located and its nature (heterogeneous). Storage virtualization allows
storage administrators greater flexibility in managing the storage devices
and the users.
• File virtualization takes care of NAS by eliminating the dependencies
between file level and the location. Due to file virtualization, optimization of
storage and migrations of storage devices can be done easily.

2. Storage Virtualization :
Benefits of Storage Virtualization
1. Non-disruptive data migration: Ability to migrate data without disturbing
concurrent I/O access.
2. Improved utilization: Utilization can be increased by pooling and
migration. When all storage media are pooled, the administrator can easily
maintain the devices and also assign disks for the users.

REFERENCES
1. https://www.javatpoint.com/virtualization-in-cloud-computing5
2. https://www.guru99.com/virtualization-cloud-computing.html
3. https://www.techtarget.com/whatis/definition/virtualization-architecture
4. https://www.brainkart.com/article/Virtual-Clusters-and-Resource-Management_11343/
5. https://gzipwtf.com/what-is-virtualization-in-grid-computing/
6. https://www.researchgate.net/publication/226151863_Grids_Clouds_and_Virtualization
7. https://indianjournals.com/ijor.aspx?target=ijor:ijst1&volume=13&issue=4&article=005
8. https://arxiv.org/ftp/arxiv/papers/1807/1807.11016.pdf
9. https://learning.oreilly.com/library/view/cloud-
computing/9789332537439/xhtml/chapter010.xhtml#ch10sec4-2

THANK YOU!!!
My Blog : https://anandgharu.wordpress.com/
Email : gharu.anand@gmail.com
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