Virtualization in IT

Replies

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  Kaustubh Katdare

  CE ran on a virtual machine for a long period of time. I really like the concept & it helps organizations by reducing the cost of hardware by taking out the most from current hardware.
  
  Can't wait to read more information from you, CB! Keep up the good work! 😀
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  Anil Jain

  Virtualization is one concept which help IT industry to overcome problems of hardware cost, environment set-up and time saving. We can divide virtualization in various categories however I would be explaining 5 broad types of virtualization here in this thread (Will provide reference links for the others)
  
  1. Platform / Server virtualization
  2. Storage virtualization
  3. Software virtualization
  4. Application Virtualization
  5. Network Virtualization
  
  More recently the creation and management of virtual machines has been called platform virtualization, or server virtualization.
  
  Lets wait for the in depth explanation of each type of virtualization...
  
  -CB
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  AGRU

  this theme of virtualization is new but by the fact mentioned seems really grt .i wud really like to know more clearly abt it
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  durga ch

  any applicational examples please for me to understand it better?
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  Anil Jain

  Platform / Server virtualization -
  
  Platform virtualization is a powerful mechanism for simulating a test setup on a few desktops/servers that would otherwise require "physical" equipments. In other words we can say Platform virtualization is performed on a given hardware platform by host software (a control program), which creates a simulated computer environment, a virtual machine, for its guest software. The guest software executes as if it were running directly on the physical hardware, with several notable caveats.
  
  Access to physical system resources (such as the network access, display, keyboard, and disk storage) is generally managed at a more restrictive level than the processor and system-memory. Guests are often restricted from accessing specific peripheral devices, or may be limited to a subset of the device's native capabilities, depending on the hardware access policy implemented by the virtualization host.
  
  The controlling sofftware which hosts the virtual operating sysem is called as Virtual Machine Managers (VMMs). These VMM's manage each virtual machine individually; each OS instance is unaware that 1) Its virtual and 2) that other virtual operating systems are (or may be) running at the same time.
  
  
  Example: - As per biggi, in inception phase of CE...
  
  Biggi must have had a physical machine with XP operating system. Then he must have installed a VMM (example: Microsft virtual server / VMWare Workstation), followed by installation of virtual operating system say windows 2003 server. He must have setup CE server on that Virtual machine.
  
  
  This way he had enjoyed 2 PC's in the cost of 1 physical machine.
  
  
  Biggi, Please correct m If I am wrong ....
  
  Am I sounding like an alien or making any sense in this post?
  
  Reference link: Platform Virtualization
  
  -CB
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  Kaustubh Katdare

  CE ran on a shared hosting environment powered by powerful linux server. The OS was CentOS virtualized by Virtuozzo containers. Its important to note that the virtual machine eats up the RAM & CPU of the physical machine its being hosted on.
  
  The technology is similar, but the mechanism of running website public website is bit different.
  
  The example configuration suggested by CB is powerful in an Intranet.