Virtualization allows multiple operating systems to run concurrently on a single physical machine. VMware is a leading virtualization software that allows this. The document discusses virtualization concepts like emulation, virtual machines, types of virtualization. It provides an overview of VMware Workstation software for desktop virtualization. Steps for installing Workstation and creating a virtual machine are outlined. Networking modes for virtual machines are explained. The document also discusses how virtualization intersect with cloud computing. It presents a case study of how Oxford University implemented a private cloud using VMware virtualization to provide database as a service for researchers.

1. VIRTUALIZATION USING VMWARE
Hitesh Gupta
Masters in Computer Applications
Roll No. 21
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2. In the presentation…
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Emulation(Prerequisite to Virtualization)
Virtualization: An Introduction
Traditional vs. Virtual Architecture
Virtualization Benefits in Universities
Operating System Virtualization
Virtualization Requirements and Recommendations
VMWare: A brief introduction
VMWare Workstation
Microsoft Virtual PC
Installing Workstation 10
Install VMware tools
Virtualization and Cloud Computing: Intersection
Case Study: Database as a Service(DBaaS) at Oxford University
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3. Emulation(Prerequisite to Virtualization)
 Emulation refers to the ability of a computer program copy (imitate) another program‟s behavior.
 Emulator is hardware or software that duplicates (or emulates) the functions of one computer
system (the guest) in another computer system (the host)
 Source computer is called the guest.
 Destination computer is called the Host
 Examples:
• DOSBox: Allows to execute Turbo C/C++ on 64-bit machines
• BlueStacks: Allows to execute android apps on Windows/Mac machines
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4. Virtualization: An Introduction
 Virtualization refers to a concept in which access to a single server, is coordinated so
that multiple guest(client) operating systems can share that server
 No guest(client) operating system being aware that it is actually sharing anything at all
 Creating a virtual environment for any program to run on an existing platform as a
guest
 The virtual environment running might be an Operating System, Storage
device, Network or an Application server among other things.
 Not a new technology. Mainframe computers have offered the ability to host multiple
operating systems for over 30 years
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5. Traditional vs. Virtual Architecture
Traditional Architecture:
• Operating system is installed on the single CPU and above that applications are installed.
• We can‟t run multiple OS at same time due to limitation of x86 chips.
• We have to STOP one OS to start other.
Virtual Architecture:
• Allows us to install multiple OS on single machine.
• We can run Windows and Linux OS at same time
• A virtualization layer is added called hypervisor. It is the supervisor of the supervisor
•
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Multiple OS are installed on this layer and can communicate among each others.

6. Virtualization Benefits in Universities
•Teach multiple operating systems with a single host computer
•Students can „own‟ their VM while having minimal access to the host computer
•Multiple VMs can run simultaneously on one host
•Easy maintenance and testing
•If VM gets a virus, Copy another one.
•Snapshots allow saving current states of the VM and we can restore VM to any previous state.
•Run multiple versions of software
•Teach Office 2007 while previewing Office 2013 by using two different VMs.
•For programming and database; write an application in one version and easily test on another version
•Isolate your OS from the campus network and host computer
•For programming and networking, run services and write software which might normally interfere with
the host computer or the campus network
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7. Operating System Virtualization
OS Virtualization (Virtual Machines)
• Separate OS from Physical Hardware
• Host OS  Guest OS
• Virtualization layer is added to the system.
Guest OS(Linux)
Guest OS(Mac)
Guest OS(Others)
Virtual Layer(VMWare Workstation)
Host OS(Windows 7)
Hardware(CPU)
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8. Operating System Virtualization(contd.)
 How does Guest OS get to Hardware?
Linux
VMWare Workstation
Windows 7
Hardware
Processor – Memory – NIC – Disk
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9. Virtualization Requirements and Recommendations
•Supported host operating system (Windows XP Pro, Vista, Server 2003/2008, Linux)
•Sufficient RAM on your host computer to accommodate the host OS and the guest OSs you wish
to run
•Sufficient CPU power
•Sufficient hard drive space to accommodate the stored VMs
•Minimum 1 GB RAM, 2+ GB recommended for Vista and Server 2008 virtual machines
•Minimum 3.0 GHz P4, recommended 2.4+ GHz dual-core CPU
•Separate hard drive (80 GB+) for the VMs
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10. Virtualization Terminology
•Host machine or host computer
•The computer on which the virtual machine software is installed (Virtual PC or VMWare, e.g.)
•Virtual machine (VM) or Guest OS
•Similar to physical machines. Have CPU, RAM, Hard disk, NIC etc.
•The operating system that runs in virtual machine software on the host computer
•Comprised primarily of a configuration file and one or more virtual hard drive files
•Virtual disk
•One or more files that reside on the host computer that make up the VM‟s hard disk
•Virtual network
•The network configuration used by the VM
•Options include: bridged, host only, NAT and none
•VMs behave like just another computer on the network
•Snapshot
•A partial copy of a VM at a particular moment in time. Allows you to „go back‟ to the VM at that particular
state. Some programs allow saving multiple snapshots.
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11. VMWare: A brief introduction
•VMWare was the first serious virtualization software
•Around since mid-90s
•The leader in server and desktop virtualization
•Free products
•VMWare Player – runs existing virtual machines but cannot create a new VM
•VMWare Server – can create and run VMs; better suited for low-end server applications
•VMWare Workstation
•Flagship desktop product
•One PC, multiple OS
•Create and run VMs
•Import VMs
•Has all of the additional support including unlimited snapshots, screen capture to create movies
•Costs: $59.99 retail
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12. VMWare Workstation
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13. Microsoft Virtual PC (Closest competitor of VMWare)
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14. Installing Workstation 10
Download from http://www.vmware.com/in/products/workstation/
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15. Networking Modes
•Bridged networking
•The VM acts like any other computer on the network
•Each VM network adapter gets its own IP address and physical address
•VMs can communicate with other VMs and other physical computers on the network including the
Internet
•Most flexible configuration
•Network Address Translation (NAT)/Shared Networking
•VM „shares‟ IP address with host computer
•Host computer acts like router/firewall
•VM can access other computers on the network including the Internet
•Other computers cannot access the VM directly
•More secure configuration than bridged
•Won‟t work if the VM is to be a server
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16. Networking Modes(contd.)
•Local/Host only networking
•VMs can communicate with only other VMs (Virtual PC) or other VMs and the host
PC (VMWare)
•No communication with other physical computers or the Internet
•Ideal for doing activities that might interfere with the classroom network
•No network connection
•Most secure configuration
•Best when no interaction with other computers, including the host, is desired
Recommended Approach: Use NAT
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17. Creating Virtual Machine(1 of 14)/ Assembling a virtual computer
Select File->New
Virtual Machine
or press Crtl+N
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Select Custom and
click Next >

18. Creating Virtual Machine(2 of 14)
Select Workstation 8.0 in
Hardware compatibility
drop down menu
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Click Next >

19. Creating Virtual Machine(3 of 14)
Select guest OS
installation source:
• CD/DVD
• ISO image
• Install later
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Click Next >

20. Creating Virtual Machine(4 of 14)
Select the guest OS
vendor and version
(depends on your
installation source)
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Click Next >

21. Creating Virtual Machine(5 of 14)
Click Next >
Type name for VM
And select install
location
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22. Creating Virtual Machine(6 of 14)
Select number of
processors and cores
for the guest OS
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Click Next >

23. Creating Virtual Machine(7 of 14)
Select the amount
of RAM available to
guest OS.
Best practice:
Allocate minimum
OS requirement
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Click Next >

24. Creating Virtual Machine(8 of 14)
Select your preferred
network mode
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Click Next >

25. Creating Virtual Machine(9 of 14)
Select I/O controller for
guest.
Recommended:
Bus Logic (x86-based)
LSI Logic (x64-based)
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Click Next >

26. Creating Virtual Machine(10 of 14)
Select your preferred
disk type:
• Create New
• Use Existing
• Use Physical(NOT
recommended)
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Click Next >

27. Creating Virtual Machine(11 of 14)
Select disk type
either IDE or SCSI.
NAS/SAN are not
supported.
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Click Next >

28. Creating Virtual Machine(12 of 14)
Select virtual hard
disk size.
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Click Next >

29. Creating Virtual Machine(13 of 14)
Type in name for
virtual disk image
file(*.vmdk)
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Click Next >

30. Creating Virtual Machine(14 of 14)
Review all settings.
To add/modify H/W
device, click
Customize
Hardware…
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Click Finish to
boot up your new
VM

31. Installing guest OS
Guest
OS
install
screen

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Install
Guest
OS…

32. Logging into guest OS
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33. Install VMware tools
Benefits:
• Provides additional functionality to guest
• Support Graphic drivers
• Guest/Host file transfer.
• Better mouse and keyboard emulation.
Procedure:
• Mount VMware tools ISO file into system
• For Linux based guests, extract the files from vmware-tools<ver>.tar.gz file
• In terminal, run command .vmware-install.pl
• After successful completion, reboot the guest.
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34. Guest running Fedora 13
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35. Cloud Computing (A brief introduction)
•
A model for enabling convenient access to a shared pool of computing resources
(e.g., networks, servers, storage, applications, and services) that can be rapidly
provisioned and released with minimal service provider interaction.
• The provider‟s computing resources are pooled to serve multiple consumers using a
multi-tenant model, with different physical and virtual resources dynamically assigned
and reassigned according to consumer demand.
• Cloud maximizes the efficiency of a resource by spreading it out over multiple
consumers.
Example: Google Drive(http://drive.google.com/) is a SaaS technology.
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36. Virtualization and Cloud Computing: Intersection
Virtualization
• Simplifies the
process of sharing
computer
resources
• Increases the
efficiency of
hardware
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Cloud
• Allow sharing
resources in order
to improve
efficiency and
reduce costs.
• Adds management
layer so that VMs
can be
created, scaled
and torn down as
required.

37. Virtualization and Cloud Computing: Intersection (Contd.)
• “majority” of today‟s cloud solutions are built on virtualization technology.
• Virtualization specifies that resources will be shared, it does not specify how.
• Virtualization is like a “basement” and cloud is like “building a house”
BASEMENT
Cloud with Virtualization
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Cloud only

38. Advanced: VMware Server
• VMWare Server allows us to run multiple OS
on a central server(machine) which has high
CPU resources like RAM, hard-disk etc.
• All client computers can run their applications
on a central server as long as server has
enough RAM available.
VMware Server
Windows or Linux OS
• This allows clients to become “thin clients”
Used with permission. Copyright VMWare Inc. 2013
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39. Advanced: VMware vCenter Server
• vCenter server is a central point of organization‟s IT infrastructure. It manages all the ESXi
servers which in turn manages individual VM‟s.
Functions:
•
•
•
•
Resource management
Dynamic allocation of resources
Energy-efficient resource optimization
Automatic restarts
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40. Case Study: Database as a Service(DBaaS) at Oxford University
Requirements:
• They needed ability to quickly run up VM for department/college.
• They wanted to build a data center for the university.
• They wanted to create a private cloud for the university so that researchers can keep
their data safely at internal cloud.
• They also wanted to migrate private cloud at Oxford to public cloud environment.
• They required a way for researchers to manage electronic data for keeping the data, as
old as 30 years, safe.
• They needed to provide a self-service product to the researchers‟ ability to create their
own database and store on university cloud and to tweak their DB‟s
Product used: VMWare vCloud Director
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41. VMware vCloud Director(Overview)
Computer Science
Physics
Users
VMware vCloud Director
User Portal
Catalogs
Public Clouds (For outside data)
Security
VMware vCloud API
Oxford’s Virtual Datacenter
VMware
vShield
Oxford’s Backup Datacenter
Programmatic
Control and
Integrations
VMware
vCenter Server
VMware
vCenter Server
VMware
vCenter Server
VMware vSphere
VMware vSphere
VMware vSphere
Used with permission. Copyright VMWare Inc. 2013
Secure Private Cloud (For Research data)
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42. Case Study: Database as a Service(DBaaS) at Oxford University
Observed Benefits:
• Bringing at central place all the data.
• Reduce the needs of personal DB‟s by students which were not durable.
• Major cost reduction regarding purchasing of new desktop machines and physical
server hardware.
• Databases could now be up and running within few minutes which would
otherwise, require 7-8 weeks which aids in research projects.
Future of virtualization at Oxford University:
• The University is now planning to offer other small universities in U.K. which currently
cannot afford the cost of such services.
• They will complete their DBaaS (Database As A Service) project in future.
• The University wants to link up with U.K. National Public cloud.
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43. References
1: Data Center Virtualization Fundamentals, Cisco Press (2014)
2: Scott Lowe, Mastering VMware vSphere 5, Sybex (2011)
3: Bernard Golden, Virtualization for Dummies, Wiley Publishing Inc. (2013)
4. “Need Of Virtualization”
http://insights.wired.com/profiles/blogs/virtualization-why-do-we-need-it#ixzz2gyjnltOF
5. “Storage Virtualization”
http://en.wikipedia.org/wiki/Storage_virtualization
6. “Installing VMware Workstation 5”
http://kb.VMware.com/selfservice/microsites/search.do?language=en_US&cmd=displayKC&extern
alId=2057907
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44. References (Contd.)
7. “Install, Create and Use VM”
https://www.VMware.com/pdf/desktop/ws10-getting-started.pdf
8. “Video Tutorial on creating VM”
http://kb.VMware.com/selfservice/microsites/search.do?language=en_US&cmd=displayKC&exte
rnalId=1018415
9. “Brief discussion of Oxford University Case study”
http://www.VMware.com/a/customers/industry/2?sort=a&next=61
10. “A video by System Admin of Oxford discussing the benefits of vCloud Director”
http://download3.VMware.com/media/customers/VMware-Oxford-University-12Q1-EN-Video.flv
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