a brief introduction to virtualization technologies
DESCRIPTION
Yin Yunqiao [email protected] 2007-08-31 HP. A Brief Introduction To Virtualization Technologies. Virtualization. In computing, virtualization is a broad term that refers to the abstraction of computer resources. Platform virtualization Resource virtualization. Platform Virtualization. - PowerPoint PPT PresentationTRANSCRIPT
A Brief Introduction To Virtualization Technologies
2007-08-31
HP
Virtualization
In computing, virtualization is a broad term that refers to the abstraction of computer resources.
Platform virtualization Resource virtualization
Platform Virtualization
Emulation or simulation
Native virtualization and full virtualization
Hardware enabled virtualization
Partial virtualization
Paravirtualization
Operating system-level virtualization
Application Virtualization
Emulation or simulation
allowing an unmodified "guest" OS for a completely different CPU to be run.
Examples: Bochs PearPC VirtualPC QEMU(without acceleration)
Native and Full Virtualization the virtual machine simulates enough hardware to
allow an unmodified "guest" OS (one designed for the same CPU) to be run in isolation.
Examples: VirtualBox Virtual PC Vmware QEMU Win4Lin XEN/Virtual Iron
Hardware enabled virtualization
the virtual machine has its own hardware and allows a guest OS to be run in isolation.
Intel VT (IVT) AMD virtualization (AMD-V) Examples:
VMware Fusion Parallels Desktop for Mac Parallels Workstation
Partial virtualization
the virtual machine simulates multiple instances of much (but not all) of an underlying hardware environment, particularly address spaces.
Paravirtualization
the virtual machine does not necessarily simulate hardware, but instead (or in addition) offers a special API that can only be used by modifying the "guest" OS.
Terminologies Hypervisor, hypercall Enomalism
Examples: XEN, KVM, Win4Lin 9x
Operating system-level virtualization
virtualizing a physical server at the operating system level, enabling multiple isolated and secure virtualized servers to run on a single physical server.
Examples: Parallels Workstation Linux-VServer, Virtuozzo OpenVZ, Solaris Containers FreeBSD Jails Chroot ?
Application Virtualization
typically for the purpose allowing application binaries to be portably run on many different computer architectures and operating systems.
http://en.wikipedia.org/wiki/Comparison_of_Application_Virtual_Machines
Examples: .NET CLR JVM Script Languages:Python,Ruby,Javascript...
Resource Virtualization
RAID
SAN
Channel bondings
VPN/NAT
Multiprocessor and multi-core
Cluster and Grid computing
Partitioning
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/
Virtualization Under Linux(2)
QEMU http://fabrice.bellard.free.fr/qemu/
QEMU Accelerators KQEMU QVM86 VirtualBox (released in January 2007) KVM with QEMU
Virtualization Under Linux(3)
Bochs (GPLed, very slow) A portable x86 and AMD64 PCs emulator mostly
written in C++ and distributed as free software under GPL.
http://bochs.sourceforge.net/ VirtualBox(commercial&open source, fast)
http://www.virtualbox.org/ VMWare (Workstation,Server,Player)
Virtualization Under Linux(4)
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)
VMWare Virtual PC VirtualBox Bochs QEMU
Linux Virtualization in Windows(1)
Linux Virtualization in Windows(2)
CoLinux Cooperative Linuxhttp://www.colinux.org/
Topologilinux http://www.topologilinux.com
Linux Virtualization in Windows(3)
MinGW Minimalist GNU for Windows Cygwin GNUWIN32 GNUWINII UnxUtils UWIN SFU
Microsoft Windows Services for UNIX,aka Interix
Comparison of virtual machines
http://en.wikipedia.org/wiki/Comparison_of_virtual_machines
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
References
Wikipedia for any virtualization Terminologies Virtual Linux:An overview of virtualization methods, architectures, and implementations
http://www-128.ibm.com/developerworks/linux/library/l-linuxvirt/
Questions
Q&A