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Wrapping your head around virtualization (Why virtualization is important,…

- - - - Data centers are running
        only 10-15% of it's total
        capacity, but uses the same
        resources as if it was running
        100%
      - Constant growth in computing
        power
      - Need for a new way to match
        capacity with load
  - - - Increasing digital transformation
      - Exponential need for storage
      - Multiple systems in single server
        
        Now companies can buy
        space without the need to
        create new physical servers
  - - - Wasteful usage is now
        frowned upon because
        of the impact it supposes
        for the environment
  - - - Systems need to be maintained
      - Administrators are needed
        for hardware maintenance and
        software installation/maintenance
      - Virtualization allows for less machines to be used
- - - - An operating system runs on top of an
        existing host and gives the ability to
        use it as if it was running on a
        machine by itself
    - - presents an emulated hardware
        environment that guest OSs can operate on.
      - A consistent hardware environment is provided
        which can be migrated
      - Short-comings
        
        Driver compatibility
        
        performance
    - - Thin layer of virtualization
      - Multiplexing guest operating systems
      - Less performance overhead
      - drawbacks
        
        The source-code of the OS is needed
  - - - Web-based apps
        
        Multiple machines accesing the same data
        
        bottlenecks
        
        Machine storage limits
        
        Back-up problems