Products and Solutions

Virtualization Technology

What is Virtualization?

Virtualization is a technology that transforms hardware into software.
Virtualization allows you to run multiple Operating systems as virtual machines on a single computer.

  • Each copy of an operating system is installed into a virtual machine.

Virtualization is not

  • Simulation
  • Emulation

Vertulization Technology

How Does Virtualization Work?

A virtualization layer is installed. It uses either a hosted or hypervisor architecture.

Two Types

  • Host Operating System-Based.
  • Bare-Metal Hypervisor.

Host Operating System-Based Virtualization

A host-based virtualization system requires an operating system (such as Windows or Linux) to be installed on the computer.

Example:

  • VMware Server
  • VMware Workstation

Virtualization Using a Bare-Metal Hypervisor

A bare-metal hypervisor system does not require an operating system. The hypervisor is the operating system

What Is a Virtual Machine?

From the user’s perspective, it is a software platform that, like a physical computer, runs an operating system and applications.

From the hypervisor’s perspective, it is a discrete set of files. There are the main files:

  • Configuration file
  • Virtual disk file
  • NVRAM setting file
  • Log file

vMotion

  • vMotion migration moves a VM that is powered on
  • Why migrate using VMotion?
    • Improve overall hardware utilization
    • Allow continued VM operation

VMware Fault Tolerance (FT)

  • Single identical VMs running in lockstep on separate hosts
  • Zero downtime, zero data loss failover for all virtual machines in case of hardware Failures
  • Zero downtime, zero data loss
  • No complex clustering or specialized hardware required
  • Single common mechanism for all applications and OS

Why Use Virtual Machines?

Physical Machine

  • Difficult to move or copy
  • Bound to a specific set of Hardware
  • Often has short life cycle
  • Requires personal contact to upgrade hardware
  • Difficult to manage remotely

Virtual Machine

  • Easy to move and copy
    • Encapsulated into files
    • Independent of physical hardware
  • Easy to manage
    • Isolated from other virtual machines running on the same physical hardware
    • Insulated from physical hardware changes