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Virtualization Overview

Virtualization Overview. Date: 8/7/2012 SCF-FEF- SSS Author: Tyler Parsons. Agenda. What is x86 Virtualization Why virtualize Virtualization Types Virtualization Methods Virtual Machine Accelerators Virtualization (Pro/Cons) Questions. What is x86 Virtualization.

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Virtualization Overview

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  1. Virtualization Overview Date: 8/7/2012 SCF-FEF-SSS Author: Tyler Parsons

  2. Agenda • What is x86 Virtualization • Why virtualize • Virtualization Types • Virtualization Methods • Virtual Machine Accelerators • Virtualization (Pro/Cons) • Questions

  3. What is x86 Virtualization • Technology which allow multiple operating systems to simultaneously share the underlying physical hardware. • Why virtualize: • Security • Portability • Hardware Abstraction

  4. Virtualization Types • Type 1 (native): Hypervisor runs directly on the hardware. • VMware ESX • XEN • Type 2 (hosted): Hypervisor does not run directly on hardware. • Virtual Box • VMware Workstation

  5. Virtualization Methods • Paravirtualization: Presents a common software interface to the underlying virtual machine for it to interact directly with the hypervisor. • Full Virtualization • Binary Translation: Replaces instruction sets which are not virtual machine friendly with ones that are. • Hardware assisted Virtualization: Leverage special CPU instruction (AMD-V | Intel VT) on modern hardware to assist in virtualizing a virtual machine.

  6. Virtual Machine Accelerators • Paravirtualized Drivers: Hypervisor specific drivers/modules are installed within the virtual machine allowing it to make efficient system level calls to the underlying hypervisor (disk I/O, network). • SR-IOV: Commonly used to share a PCI device among multiple virtual machines. • I/O MMU (PCI Passthrough): Allows a virtual machine to use an underlying piece of hardware directly (Ethernet, raid controller ..).

  7. Virtualization (Pro/Cons) • Pro(s) • Sandboxed • Low Level ACL • Portability • Hardware Abstraction • Con(s) • Complexity • Design • Installation • Maintainability • LTS • Performance

  8. Questions?

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