virtual ization s

8/12/2019 Virtual Ization s

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A Brief Introduction To VirtualizationTechnologies

Yin Yunqiao

[email protected]

2007-08-31

HP
mailto:[email protected]:[email protected]:[email protected]


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Virtualization

In computing, virtualization is a broad term thatrefers to the abstraction of computer resources.

Platform virtualization

Resource virtualization


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Platform Virtualization

Emulation or simulation

Native virtualization and full virtualization

Hardware enabled virtualization

Partial virtualization

ParavirtualizationOperating system-level virtualization

Application Virtualization


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Emulation or simulation

allowing an unmodified "guest" OS for acompletely different CPU to be run.

Examples: Bochs

PearPC

VirtualPC QEMU(without acceleration)


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Native and Full Virtualization

the virtual machine simulates enough hardware toallow an unmodified "guest" OS (one designedfor the same CPU) to be run in isolation.

Examples:

VirtualBox

Virtual PC

Vmware QEMU

Win4Lin

XEN/Virtual Iron


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Hardware enabled virtualization

the virtual machine has its own hardware andallows a guest OS to be run in isolation.

Intel VT (IVT)

AMD virtualization (AMD-V)

Examples:

VMware Fusion

Parallels Desktop for Mac

Parallels Workstation


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Partial virtualization

the virtual machine simulates multiple instancesof much (but not all) of an underlying hardwareenvironment, particularly address spaces.


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Paravirtualization

the virtual machine does not necessarily simulatehardware, but instead (or in addition) offers aspecial API that can only be used by modifying

the "guest" OS.

Terminologies

Hypervisor, hypercall

Enomalism

Examples:

XEN, KVM, Win4Lin 9x


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Operating system-level virtualization

virtualizing a physical server at the operatingsystem level, enabling multiple isolated andsecure virtualized servers to run on a single

physical server.

Examples:

Parallels Workstation

Linux-VServer, Virtuozzo

OpenVZ, Solaris Containers

FreeBSD Jails

Chroot ?


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Application Virtualization

typically for the purpose allowing applicationbinaries to be portably run on many differentcomputer architectures and operating systems.

http://en.wikipedia.org/wiki/Comparison_of_Application_Virtual_Machines

Examples:

.NET CLR

JVM

Script Languages:Python,Ruby,Javascript...
http://en.wikipedia.org/wiki/Comparison_of_Application_Virtual_Machineshttp://en.wikipedia.org/wiki/Comparison_of_Application_Virtual_Machineshttp://en.wikipedia.org/wiki/Comparison_of_Application_Virtual_Machineshttp://en.wikipedia.org/wiki/Comparison_of_Application_Virtual_Machineshttp://en.wikipedia.org/wiki/Comparison_of_Application_Virtual_Machines


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Virtualization Under Linux(1)

UML (User Mode Linux)

http://user-mode-linux.sourceforge.net/

KVM (Kernal-based Virtual Machine)

From Linux-2.6.20

http://kvm.qumranet.com/kvmwiki

XEN

http://xen.xensource.com/


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QEMU

http://fabrice.bellard.free.fr/qemu/

QEMU Accelerators KQEMU

QVM86

VirtualBox (released in January 2007)

KVM with QEMU
http://fabrice.bellard.free.fr/qemu/http://fabrice.bellard.free.fr/qemu/http://fabrice.bellard.free.fr/qemu/


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Bochs (GPLed, very slow)

A portable x86 and AMD64 PCs emulator mostlywritten in C++ and distributed as free software underGPL.

http://bochs.sourceforge.net/

VirtualBox(commercial&open source, fast)

http://www.virtualbox.org/

VMWare (Workstation,Server,Player)
http://bochs.sourceforge.net/http://www.virtualbox.org/http://www.virtualbox.org/http://www.virtualbox.org/http://bochs.sourceforge.net/http://bochs.sourceforge.net/


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SWSOFT Virtualizations

http://www.swsoft.com

http://www.parallels.com/ http://openvz.org/

Linux-VServer

http://linux-vserver.org/ Compare with:

FreeBSD Jail

Solaris Containers (Zones)
http://www.swsoft.com/http://www.parallels.com/http://openvz.org/http://openvz.org/http://openvz.org/http://www.parallels.com/http://www.parallels.com/http://www.swsoft.com/http://www.swsoft.com/


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VMWare

Virtual PC

VirtualBox

Bochs

QEMU

Linux Virtualization in Windows(1)


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CoLinux Cooperative Linuxhttp://www.colinux.org/

Topologilinuxhttp://www.topologilinux.com
http://www.colinux.org/http://www.topologilinux.com/http://www.topologilinux.com/http://www.topologilinux.com/http://www.colinux.org/http://www.colinux.org/


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MinGW Minimalist GNU for Windows

Cygwin

GNUWIN32 GNUWINII

UnxUtils

UWIN SFU

Microsoft Windows Services for UNIX,aka Interix
http://gnuwin32.sourceforge.net/http://gnuwin.epfl.ch/http://unxutils.sourceforge.net/UnxUtils.htmlhttp://www.research.att.com/sw/tools/uwinhttp://www.research.att.com/sw/tools/uwinhttp://www.research.att.com/sw/tools/uwinhttp://unxutils.sourceforge.net/UnxUtils.htmlhttp://unxutils.sourceforge.net/UnxUtils.htmlhttp://gnuwin.epfl.ch/http://gnuwin.epfl.ch/http://gnuwin32.sourceforge.net/http://gnuwin32.sourceforge.net/http://gnuwin32.sourceforge.net/


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Comparison of virtual machines

http://en.wikipedia.org/wiki/Comparison_of_virtual_machines


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History of virtualization development 1965 IBM M44/44X paging system

1965 IBM System/360-67 virtual memory hardware

1967 IBM CP-40 (January) and CP-67 (April) time-sharing

1972 IBM VM/370 run VM under VM

1997 Connectix First version of Virtual PC

1998 VMWare U.S. Patent 6,397,242

1999 VMware Virtual Platform for the Intel IA-32

architecture

2000 IBM z/VM

2001 Connectix Virtual PC for Windows

2003 Microsoft acquired Connectix

2003 EMC acquired Vmware

2003 VERITAS acquired Ejascent

2005 HP Integrity Virtual Machines

2005 Intel VT

2006 AMD VT

2005 XEN

2006 VMWare Server

2006 Virtual PC 2006

2006 HP IVM Version 2.0

2006 Virtual Iron 3.1

2007 InnoTek VirtualBox

2007 KVM in Linux Kernel

2007 XEN in Linux Kernel


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References

Wikipedia for any virtualization Terminologies

Virtual Linux:An overview of virtualization methods, architectures, and implementationshttp://www-128.ibm.com/developerworks/linux/library/l-linuxvirt/


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Questions

Q&A

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