304-200 – LPIC-3 Virtualization & High Availability

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  Create filesystems during the installation of new VM guest operating systems.

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  Provide host-wide unique PIDs to the processes running inside the VMs in order to ease interprocess communication between virtual machines.

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  Map the resources of virtual machines to the resources of the host system.

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  Ensure isolation and eliminate any interference between virtual machines.

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  Manage authentication to network services running inside a virtual machine.
  
  

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  The hypervisor may provide fine-grained limits to internal elements of the guest operating system such as the number of processes.

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  Full virtualization cannot pose any limits to virtual machines and always assigns the host system's resources in a first-come-first-serve manner.

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  It is up to the virtual machine to use its assigned hardware resources and create, for example, an arbitrary amount of network sockets.

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  The hypervisor provides each virtual machine with hardware of a defined capacity that limits the resources of the virtual machine.

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  All processes created within the virtual machines are transparently and equally scheduled in the host system for CPU and I/O usage.
  
  

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  Creation of new instances can be automated by using scripts or APIs and service interfaces.

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  The root file system of a computing instance is always persistent and can be accessed after the instance is destroyed.

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  Each and every user of an IaaS cloud has exactly one computing instance.

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  Once created, computing instances are seldom deleted in order to ensure the accessibility of the instance's data.

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  Instances may be created when needed and destroyed when they become obsolete.