Presentation of Virtual Machine

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Presentation of Virtual Machine

  1. 1. VIRTUAL MACHINE Presented by : Zain Raza Discipline : Information Technology 5th Semester
  2. 2. OUTLINE  History of Virtual Machine  Virtual Machine (VM) mean?  Types  Use of VM  Virtual Machine Application  Pros & Cons of VM
  3. 3. HISTORY OF VM  VM is a family of IBM virtual machine operating systems used on IBM mainframes System/370.  The first version, released in 1972, was VM/370.  This was a System/370 reimplementation of earlier CP/CMS operating system.
  4. 4. VIRTUAL MACHINE MEAN? • A virtual machine (VM) is a software program or operating system that not only exhibits the behavior of a separate computer, but is also capable of performing tasks such as running applications and programs like a separate computer. • A virtual machine, usually known as a guest is created within another computing environment referred as a "host." Multiple virtual machines can exist within a single host at one time. • A virtual machine is also known as a guest.
  5. 5. VIRTUAL MACHINE CONCEPT :
  6. 6. SNAPSHOT OF VM
  7. 7. TYPES OF VIRTUAL MACHINE There are two main types of virtual machines : One, which is called a system virtual machine, is used to mimic all the processes and components of an actual computer. The other, which is known as a process virtual machine, is used to run only a single application and disappears when that application is closed.
  8. 8. SYSTEM VIRTUAL MACHINES :  It allow a person to use a single server as if it were many different computers.  Using system machines also allows a user to run multiple operating systems on the same machine.  This allows a user to run programs that are only available on one type of operating system.  It also makes it possible to test a program across multiple platforms without switching machines.  System virtual machines (also known as full virtualization VMs) provide a complete substitute for the targeted real machine and a level of functionality required for the execution of a complete operating system.
  9. 9. PROCESS VIRTUAL MACHINES :  They are used to run a single program in isolation from the physical computer’s operating system.  This allows a user to run a program that might otherwise be incompatible with the normal operating system.  Each process machine is created to run a specific program and exists only while the program is running.  Closing the program it is running will make a process machine disappear, and opening that program again will create a new virtual machine.
  10. 10. USES OF VIRTUAL MACHINE :  Virtual machines allow user to run an multiple operating system on his windows desktop.  VM use to run different software on an operating system.  By using VM we can try different new operating systems on your O/S.  By using VM you can try your new software or web apps or even site design by just building virtual machines and running the tests there.  When you get ready to move from XP to Vista, you can use VMWare to make a backup of your old system.
  11. 11. VIRTUAL MACHINE APPLICATIONS : There are three major virtual machine applications that run on all three major computer operating systems (Windows, Mac OS, and Linux). The three virtual machine applications are:  Parallels  VMware  Qemu  KVM  Xen  TeamViewer  VirtualBox.
  12. 12. THE MAIN PROS & CONS OF VM : Pros :  You can run other programs in a VM that may not necessarily be in the same OS as the host machine.  Ability to run more than one OS simultaneously.  You can install/reinstall/backup/move your guest OS easily.  You can manage allocation of resource (Memory, Hard disk), and etc.
  13. 13. THE MAIN PROS & CONS OF VM : Cons :  Performance drop. Usually much slower due to the workload on the system by running virtual machines.  Virtual machine is not that efficient as a real one when accessing the hardware.

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