Two types of hypervisors

Fig. 4.3/1
Fig. 4.3/1: Hipervisors type 1 and 2
A hypervisor, also called virtual machine monitor (VMM) is a p software, firmware or hardware that creates and runs virtual machines.
There are two types of hypervisors:
  • Type one - native or bare-metal hypervisors -hypervisors run directly on the system hardware
  • Type two - hosted hypervisors - hypervisors run on a host operating system that provides virtualization services, such as I/O device support and memory management


Match items with correct types

 Current Virtualization market players

  • VMware is the current market leader in server virtualization
    Flagship product vSphere provides the infrastructure and management solutions for large enterprise level virtual enviroments
  • Businesses are turning to IBM PowerVM virtualization
    PowerVM provides a secure and scalable virtualization environment for AIX, i and Linux applications built upon the advanced RAS features and leading performance of the Power Systems platform
  • Kernel-based Virtual Machine (KVM) is rapidly gaining interest
    KVM is part of the Linux kernel since 2.6.20 and provides native virtualization on Intel VT and AMD-V CPUs. About 58% market share of Linux space
  • Microsoft's Hyper-VTM runs on Windows 2008 ServerTM, provided with the server software
    It supports Microsoft guest virtual machines and some non-Microsoft [Linux] guest operating systems. Midmarket winning -30% of the time
  • Xen is an open-source hypervisor that is available for Linux & Solaris
    Citrix XenServerTM is a commercial and fully supported Xen hypervisor
Hypervisors in business
52% of Large Midmarket (500-999 employees) and 67% of Enterprise (1000+ employees) companies have multiple hypervisors. ESG 2012