Virtual Machines

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4 Terms

1
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What is native architecture?

  • The operating system sits between applications and hardware

  • The OS manages the running of applications and hardware resources

  • The OS is the lowest level of software

<ul><li><p>The operating system sits between applications and hardware</p></li><li><p>The OS manages the running of applications and hardware resources</p></li><li><p>The OS is the lowest level of software </p></li></ul>
2
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What is virtualisation architecture type 1?

  • “Bare metal virtualisation”,

  • A hypervisor sits between the hardware and the virtual machines running on the system, with each virtual machine running its own apps.

  • A hypervisor is software that creates and runs virtual machines (also called the Virtual Machine Monitor or the VMM)

  • The hypervisor is the lowest level of software

<ul><li><p>“Bare metal virtualisation”, </p></li><li><p>A hypervisor sits between the hardware and the virtual machines running on the system, with each virtual machine running its own apps. </p></li><li><p>A hypervisor is software that creates and runs virtual machines (also called the Virtual Machine Monitor or the VMM)</p></li><li><p> The hypervisor is the lowest level of software</p></li></ul>
3
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What is virtualisation architecture type 2?

  • “Hosted virtualisation”,

  • The host os runs the hypervisor as an application alongside other applications,

  • The hypervisor runs virtual machines that run their own apps.

  • Like native architecture, the host OS runs directly above the hardware as the lowest level of software.

<ul><li><p>“Hosted virtualisation”, </p></li><li><p>The host os runs the hypervisor as an application alongside other applications,</p></li><li><p>The hypervisor runs virtual machines that run their own apps.</p></li><li><p>Like native architecture, the host OS runs directly above the hardware as the lowest level of software.</p></li></ul>
4
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How is the hardware handled in virtualisation architecture type 2?

  • The hardware is simulated as files with constrained sizes, thus limiting the access of the virtual machines to the system's hardware.

  • When needed the files used by the virtual machines are sent to the hardware devices they emulate to carry out tasks.

<ul><li><p>The hardware is simulated as files with constrained sizes, thus limiting the access of the virtual machines to the system's hardware.</p></li><li><p>When needed the files used by the virtual machines are sent to the hardware devices they emulate to carry out tasks.</p></li></ul>