- Comparison of platform virtual machines
Platform virtual machines are software packages which emulate the whole physical computer machine, often giving multiple virtual machines on one physical platform. The table below compares basic information about platform virtual machine (VM) packages.
Name Creator Host CPU Guest CPU Host OS(s) Guest OS(s) License Bochs Kevin Lawton Any x86, x86-64 Windows, Linux, Unix/X11, Mac OS 9, Mac OS X, BeOS, MorphOS, OS/2 Windows, Linux, DOS, BSD, OS/2 LGPL Containers, or Zones Sun Microsystems x86, x86-64, SPARC (portable: not tied to hardware) Same as host Solaris 10, Solaris 11 Express, OpenSolaris 2009.06 Solaris (8, 9, 10, 11), Linux (BrandZ) CDDL Cooperative Linux (coLinux) Dan Aloni, other developers x86 Same as host Windows 2000, XP, 2003, Vista Linux GPL version 2 Denali University of Washington x86 x86 Denali Ilwaco, NetBSD ? DOSBox Peter Veenstra, Sjoerd, community help Any x86 Linux, Windows, Mac OS classic, Mac OS X, BeOS, FreeBSD, OpenBSD, Solaris, QNX, IRIX, MorphOS, AmigaOS, Maemo, Symbian Internally emulated DOS shell; classic PC booter games, unofficially Windows 1.0 to 3.11 GPL DOSEMU Community project x86, x86-64 x86 Linux DOS GPL version 2 FreeBSD Jail FreeBSD Any running FreeBSD Any running FreeBSD FreeBSD FreeBSD, Linux ABI BSD GXemul Anders Gavare Any ARM, MIPS, M88K, PowerPC, SuperH Unix-like NetBSD, OpenBSD, Linux, Ultrix, Sprite BSD Hercules Begun by Roger Bowler, as of 2011[update] maintained by Jay Maynard Any z/Architecture Unix-like Linux on zSeries, z/OS, z/VM, z/VSE, OS/360, DOS/360, DOS/VS, MVS, VM/370, TSS/370 QPL Hyper-V Server 2008 R2 Microsoft x86-64 + hardware-assisted virtualization (Intel VT-x or AMD-V) x86-64, x86 (up to 8 physical CPUs) Windows 2008 w/Hyper-V Role, Windows Hyper-V Server supported drivers for Windows 2000, Windows 2003, Windows 2008, Windows XP, Windows Vista, Linux (SUSE 10 released, more announced) Proprietary iCore Virtual Accounts iCore Software x86 x86 Windows XP Windows XP Proprietary Integrity Virtual Machines Hewlett-Packard IA-64 IA-64 HP-UX HP-UX, Windows, Linux (OpenVMS announced) Proprietary JPC (Virtual Machine) Oxford University Any running the Java Virtual Machine x86 Java Virtual Machine DOS, Linux, Windows up to 3.0 GPL version 2 KVM Qumranet  x86, x86-64, IA-64, with x86 virtualization, s390, PowerPC (see restrictions, e.g., no PowerPC 970 support) Same as host Linux, illumos FreeBSD, Linux, Solaris, Windows, Plan 9 GPL version 2 Linux-VServer Community Project x86, x86-64, IA-64, Alpha, PowerPC 64, PA-RISC 64, SPARC64, ARM, S/390, SH/66, MIPS Compatible Linux Linux variants GPL version 2 LynxSecure LynuxWorks x86, Intel VT-x, Intel VT-d x86 No host OS LynxOS, Linux, Windows Proprietary lxc Community project lxc.sourceforge.net x86, x86-64, IA-64, PowerPC 64, SPARC64 Same as host Linux Linux variants GPL version 2 Mac-on-Linux Mac-on-Linux PowerPC PowerPC Linux Mac OS X, Mac OS 7.5.2 to 9.2.2, Linux GPL Mac-on-Mac Sebastian Gregorzyk PowerPC PowerPC Mac OS X, up to Tiger excluded Mac OS X, Mac OS 7.5.2 to 9.2.2, Linux GPL OpenVZ Community project, supported by SWsoft, now Parallels, Inc. x86, x86-64, IA-64, PowerPC 64, SPARC64 Same as host Linux Linux variants GPL Oracle VM for x86 Oracle Corporation x86, x86-64, Intel VT-x, AMD-V x86, x86-64, Intel VT-x, AMD-V No host OS Microsoft Windows, Oracle Enterprise Linux, Red Hat Enterprise Linux, Solaris Oracle VM Server GPL; Manager proprietary Oracle VM Server for SPARC (LDoms) Oracle Corporation UltraSPARC T1, UltraSPARC T2, UltraSPARC T2+, SPARC T3 Compatible Solaris 10 Solaris, Linux, FreeBSD Proprietary OVPsim OVP  x86 OR1K, MIPS32, ARC600/700, ARM; and public API which enables users to write custom processor models, RISC, CISC, DSP, VLIW all possible Microsoft Windows, Linux Depends on target machine, for example includes MIPS Malta that runs Linux or SMP-Linux; and includes public API which enables users to write custom peripheral and system models Proprietary, Apache 2.0 for models Parallels Desktop for Mac Parallels, Inc. x86, Intel VT-x x86 Mac OS X x86 DOS, Windows, Linux, Mac OS X Server, FreeBSD, OS/2, eComStation, Solaris Proprietary Parallels Workstation Parallels, Inc. x86, Intel VT-x x86 Windows, Linux Windows, Linux, FreeBSD, OS/2, eComStation, DOS, Solaris Proprietary PearPC Sebastian Biallas x86, x86-64, PowerPC PowerPC Windows, Linux, Mac OS X, FreeBSD, NetBSD Mac OS X, Darwin, Linux GPL PikeOS SYSGO AG PowerPC, x86, ARM, MIPS, SPARC, SuperH Same as host PikeOS PikeOS native, Linux, RTEMS, OSEK, ARINC 653 APEX, ITRON Proprietary PowerVM IBM POWER4, POWER5, POWER6, PowerPC 970 POWER4/5/6, PowerPC 970, X86 (PowerVM-Lx86) No host OS Linux PowerPC, x86; AIX, i5/OS, IBM i Proprietary QEMU Fabrice Bellard, other developers x86, x86-64, IA-64, PowerPC, Alpha, SPARC 32/64, ARM, S/390, M68k x86, x86-64, ARM, CRIS, LM32, MicroBlaze, MIPS, SPARC 32/64, PowerPC Windows, Linux, Mac OS X, Solaris, FreeBSD, OpenBSD, BeOS Changes regularly GPL/LGPL QEMU w/ kqemu module Fabrice Bellard x86, x86-64 Same as host Linux, FreeBSD, OpenBSD, Solaris, Windows Changes regularly GPL/LGPL QEMU w/ qvm86 module Paul Brook x86 x86 Linux, NetBSD, Windows Changes regularly GPL QuickTransit Transitive Corp. x86, x86-64, IA-64, POWER MIPS, PowerPC, SPARC, x86 Linux, Mac OS X, Solaris Linux, Mac OS X, Irix, Solaris Proprietary RTS Hypervisor Real-Time Systems x86 x86 No host OS Windows 7, Windows XP, Windows Embedded, Windows CE, Linux, Android, VxWorks, OS-9, RTOS-32, QNX, RTEMS, T-Kernel, proprietary Proprietary ScaleMP vSMP Foundation ScaleMP x86, x86-64 Same as host, up to 8,192 CPUs and 64 TB per VM No host OS Linux Proprietary vNUMA Matthew Chapman ia64 ia64, combines CPUs and memory from independent nodes into a virtual NUMA machine No host OS Linux Open source/research Safe Virtual Machine, SVM Altreonic, www.altreonic.com Any Any OpenComRTOS or any other (RT)OS N.A. Binary, Open Technology License SIMH Bob Supnik, The Computer History Simulation Project Alpha, ARM, HPPA, x86, IA-64, x86-64, M68K, MIPS, MIPSel, POWER, s390, SPARC Data General Nova, Eclipse; Digital Equipment Corporation PDP-1, PDP-4, PDP-7, PDP-8, PDP-9, PDP-10, PDP-11, PDP-15, VAX; GRI Corporation GRI-909, IBM 1401, 1620, 1130, 7090/7094, System 3; Interdata (Perkin-Elmer) 16b/32b systems; Hewlett-Packard 2114, 2115, 2116, 2100, 21MX; Honeywell H316/H516; MITS Altair 8800 with 8080 and Z80; Royal-Mcbee LGP-30, LGP-21; Scientific Data Systems SDS 940 BSD, Linux, Solaris, VMS, Windows Depends on target machine, includes NetBSD/VAX, OpenBSD/VAX, VAX/VMS, Unix v6, Unix v7, TOPS-10, TOPS-20, ITS BSD-like, unique Simics Virtutech x86, x86-64, SPARC v9 Alpha, ARM, IA-64, MIPS 32/64, MSP430, POWER, PowerPC 32/64, SPARC v8/v9, x86, x86-64, TI TMS320C64xx Windows, Linux, Solaris Depends on target machine, VxWorks, OSE, QNX, Linux, Solaris, Windows, FreeBSD, RTEMS, TinyOS, many others Proprietary Sun xVM Server Sun Microsystems x86-64, SPARC Same as host No host OS Windows XP, 2003 Server (x86-64 only), Linux, Solaris GPL version 3 SVISTA 2004 Serenity Systems International x86 x86 Windows, OS/2, Linux Windows, Linux, OS/2, BSD Proprietary TRANGO TRANGO Virtual Processors, Grenoble, France ARM, XScale, MIPS, PowerPC Paravirtualized ARM, MIPS, PowerPC No host OS, Linux or Windows as dev. hosts Linux, eCos, µC/OS-II, WindowsCE, Nucleus, VxWorks Proprietary User Mode Linux Jeff Dike, other developers x86, x86-64, PowerPC Same as host Linux Linux GPL version 2 VirtualBox Innotek, acquired by Oracle Corporation x86, x86-64 x86, (x86-64 only on VirtualBox 2 and later with hardware virtualization) Windows, Linux, Mac OS X x86, Solaris, FreeBSD, eComStation DOS, Linux, Mac OS X Server, FreeBSD, Haiku, OS/2, Solaris, Syllable, Windows GPL version 2; full version with extra enterprise features is proprietary Virtual Iron 3.1 Virtual Iron Software, Inc., acquired by Oracle x86 VT-x, x86-64 AMD-V x86, x86-64 No host OS Windows, Linux Full product is proprietary, a few components are GPL version 2 Virtual PC 2007 Connectix x86, x86-64 x86 Windows Vista (Business, Enterprise, Ultimate), XP Pro, XP Tablet PC Edition DOS, Windows, OS/2, Linux (SUSE, Xubuntu), OpenSolaris (Belenix) Proprietary Windows Virtual PC Connectix x86, x86-64 with Intel VT-x or AMD-V x86 Windows 7 Windows XP, Windows Vista, Windows 7, Windows Server 2003, Windows Server 2008 Proprietary Virtual PC 7 for Mac Connectix PowerPC x86 Mac OS X Windows, OS/2, Linux Proprietary VirtualLogix VLX VirtualLogix ARM, TI DSP C6000, x86, Intel VT-x, Intel VT-d, PowerPC Same as host No host OS Linux, Windows XP, C5, VxWorks, Nucleus, DSP/BIOS, proprietary Proprietary Virtual Server 2005 R2 Connectix x86, x86-64 x86 Windows 2003, XP Windows NT, 2000, 2003, Linux (Red Hat, SUSE) Proprietary CoWare Virtual Platform CoWare x86, x86-64, SPARC v9 Devices including (multi) cores from ARM, MIPS, PowerPC, Toshiba MeP, Renesas SH, TI, Tensilica, ZSP Windows, Linux, Solaris Depends on guest CPU; includes: Linux (various flavors), mITRON (various flavors), Windows CE, Symbian, more Proprietary Virtuozzo SWsoft, now Parallels, Inc. x86, IA-64, x86-64 x86, IA-64, x86-64 Linux, Windows Linux, Windows Proprietary VMware ESX Server VMware x86, x86-64 x86, x86-64 No host OS Windows, Linux, Solaris, FreeBSD, OSx86 (as FreeBSD), virtual appliances, Netware, OS/2, SCO, BeOS, Darwin, others: runs arbitrary OS Proprietary VMware ESXi VMware x86, x86-64 x86, x86-64 No host OS Same as VMware ESX Server Proprietary VMware Fusion VMware x86, x86-64 x86, x86-64 Mac OS X x86 Same as VMware ESX Server Proprietary VMware Server VMware x86, x86-64 x86, x86-64 Windows, Linux Same as VMware ESX Server Proprietary VMware Workstation 7.1 VMware x86, x86-64 x86, x86-64 Windows, Linux Same as VMware ESX Server Proprietary VMware Player 3.1 VMware x86, x86-64 x86, x86-64 Windows, Linux Same as VMware ESX Server Proprietary, free of charge for personal non-commercial use Wind River hypervisor Wind River x86, PowerPC Same as host No host OS Linux, VxWorks, unmodified guests (including MS Windows and RTOSes such ach OSE, QNX and others), bare metal virtual board Proprietary Wind River VxWorks MILS Platform Wind River PowerPC Same as host No host OS VxWorks, bare metal virtual board Proprietary Xen Xensource x86, x86-64, IA-64 Same as host NetBSD, Linux, Solaris FreeBSD, NetBSD, Linux, Solaris, Windows XP & 2003 Server (needs vers. 3.0 and an Intel VT-x (Vanderpool) or AMD-V (Pacifica)-capable CPU), Plan 9 GPL XtratuM Universidad Politecnica de Valencia x86, x86; SPARC v8 LEON2/3 Same as host No host OS GPOS: Linux, RTOS: PartiKle, RTEMS GPL z/VM IBM z/Architecture z/Architecture, z/VM does not run on predecessor mainframes No host OS, itself (single or multiple levels/versions deep, e.g. VM/ESA running in z/VM 4.4 in z/VM 5.2 in z/VM 5.1.) Linux on zSeries, z/OS, z/VSE, z/TPF, z/VM, VM/CMS, MUSIC/SP, OpenSolaris for System z, predecessors Proprietary z LPARs IBM z/Architecture z/Architecture Integrated in firmware of System z mainframes Linux on zSeries, z/OS, z/VSE, z/TPF, z/VM, MUSIC/SP, and predecessors Integrated in firmware of System z mainframes Name Creator Host CPU Guest CPU Host OS(s) Guest OS(s) License
Name Guest OS SMP available Runs arbitrary OS Supported guest OS drivers Method of operation Typical use Speed relative to host OS Commercial support available Containers, or Zones Yes, over 500-way on current systems No Uses native device drivers Operating system-level virtualization Server consolidation with workload isolation, single workload containment, hosting, dev/test/prod Native Yes Hyper-V Server 2008 R2 Yes, up to 4 VCPUs per VM Yes Yes Virtualization Server consolidation, service continuity, dev/test, desktop virtualization, could computing Near native Yes OpenVZ Yes No Compatible Operating system-level virtualization Virtualized server isolation Native ? KVM Yes, up to 16 VCPUs per VM Yes Yes AMD-V and Intel-VT-x ? ? Yes, Look at RedHat or Novell for details Linux-VServer Yes No Compatible Operating system-level virtualization Virtualized server isolation Native Yes Oracle VM Server for x86 Yes Yes Yes Paravirtualization and hardware virtualization Server consolidation and security, enterprise and business deployment Near native Yes Oracle VM Server for SPARC Yes Yes Yes Paravirtualization and hardware virtualization Server consolidation and security, enterprise and business deployment Near native Yes OVPsim Yes Yes Yes, but most of the time unmodified is the goal Full system simulation with optional component virtualization Software development (early, embedded), advanced debug for single and multicore software, compiler and other tool development, computer architecture research, hobbyist Depends on target, up to 500% faster than embedded target, runs over 1,000 MIPS on desktop Yes, with commercial license from Imperas PikeOS Yes Yes, but modifications required as paravirtualization is used Yes Paravirtualization Safety and security critical embedded systems. Near native Yes RTS Hypervisor Yes Yes Compatible. OS drivers run unmodified, no special drivers required Two modes: full virtualization and paravirtualization; both modes may be used for different operating systems concurrently x86 based devices: vertical markets include robotics, industrial automation, medical, telecom, test and measurement; focus is on real-time uses Native Yes ScaleMP vSMP Foundation Yes, up to 8,192 CPUs and 64 TB per VM Yes Yes Virtualization Server scaling (large workloads), Server consolidation, Cloud computing Near Native Yes Safe Virtual Machine Altreonic Not applicable Runs on any OS OpenComRTOS all services Interpreter Executes binary code on any embedded processor, diagnostics, dynamic code loading, 3KB code size Depends on application Yes Sun xVM Server Yes Yes Yes Paravirtualization and porting or hardware virtualization Servers Up to near native speed Yes SVISTA 2004 No ? ? ? Hobbyist, Developer, Business workstation ? ? TRANGO Yes Yes Yes Paravirtualization and porting or hardware virtualization Mob. phone, STB, routers, etc. Native ? User Mode Linux ??? No special guest kernel+modules required Porting used as a separate machine for a server or with X11 networking near Native  (Runs slow as all calls are proxied) ? Oracle VirtualBox Yes Yes Yes Virtualization Business workstation, server consolidation, service continuity, developer, hobbyist Near native Yes (with commercial license) Virtual Iron 3.1 Yes, up to 8 way Yes Yes Native virtualization Server consolidation, service continuity, dev/test Near Native Yes Virtual PC 2007 No Yes Yes Virtualization, guest calls trapping where supported Hobbyist, Developer, Business workstation Near native with virtual machine additions ? Windows Virtual PC Yes Yes Yes Hardware virtualization Developer, Business workstation, support for Compatibility with Windows XP applications Near native with virtual machine additions No Virtual PC 7 for Mac No Yes Yes dynamic recompilation (guest calls trapping where supported) Hobbyist, Developer, Business workstation Slow ? Virtual Server 2005 R2 No Yes Yes Virtualization (guest calls trapping where supported) Server, server farm Near native with virtual machine additions ? CoWare Virtual Platform Yes Yes Yes ( Same compiled Software image as for the real device) Full-system virtualization (Processor Core ISA + Hardware + External connections) Early embedded software development and integration (from driver to application), Multi-core software debugging and optimization Depending on the system characteristics and the software itself, ranges from faster than real time to slow. Yes Virtuozzo Yes No Compatible Operating system-level virtualization Server consolidation, service continuity, disaster recovery, service providers Native  Yes VMware ESX Server 4.0 (vSphere) Yes, add-on, up to 8 way Yes Yes Virtualization Server consolidation, service continuity, dev/test, cloud computing Up to near native Yes VMware ESX Server 3.0 Yes, add-on, up to 4 way Yes Yes Virtualization Server consolidation, service continuity, dev/test Up to near native Yes VMware ESX Server 2.5.3 Yes, add-on, 2 way Yes Yes Virtualization Server consolidation, service continuity, dev/test Up to near native Yes VMware Fusion Yes Yes Yes Virtualization Hobbyist, Developer, Tester, Business workstation Near native Yes VMware Server Yes (2-way) Yes Yes Virtualization Server/desktop consolidation, dev/test Up to near native Yes VMware Workstation 6.0 Yes (2-way) Yes Yes Paravirtualization (VMI) and virtualization Technical professional, advanced dev/test, trainer Up to near native Yes VMware Player 2.0 Yes (2-way) Yes Yes Virtualization Technical professional, advanced dev/test, trainer, end user on prebuilt machines Up to near native Yes Wind River hypervisor No Yes Yes Paravirtualization, hardware assisted virtualization Embedded, safety critical, secure Native Yes Wind River VxWorks MILS Platform No Yes Yes Paravirtualization, hardware assisted virtualization Embedded, safety critical, secure Native Yes Xen Yes, v4.0.0: up to 128 VCPUs per VM Yes Not required with the exception of the networking drivers where a NAT is required. A modified guest kernel or special hardware level abstraction is required for guest OSs. Paravirtualization and porting or hardware virtualization Server/desktop consolidation, dev/test Up to near native speed, substantial performance loss on some workloads (network and disk intensive especially) Yes XtratuM Yes No Yes, but not required. Paravirtualization Embedded, safety critical, secure Native (overhead lower than 1%) Yes z/VM Yes, both real and virtual (guest perceives more CPUs than installed), incl. dynamic CPU provisioning and reassignment Yes Yes, but not required Virtualization (among first systems to provide hardware assists) Servers Near Native Yes z LPARs Yes, both real and virtual (guest perceives more CPUs than installed), incl. dynamic CPU provisioning and reassignment; up to 64 real cores Yes Yes, but not required Microcode and hardware hypervisor Servers Native: System z machines always run with at least one LPAR Yes Name Guest OS SMP available Runs arbitrary OS Supported guest OS drivers Method of operation Typical use Speed relative to host OS Commercial support available
- ^ Providing any virtual environment usually requires some overhead of some type or another. Native usually means that the virtualization technique does not do any CPU level virtualization (like Bochs), which executes code more slowly than when it is directly executed by a CPU. Some other products such as VMWare and Virtual PC use similar approaches to Bochs and QEMU, however they use a number of advanced techniques to shortcut most of the calls directly to the CPU (similar to the process that JIT compiler uses) to bring the speed to near native in most cases. However, some products such as coLinux, Xen, z/VM (in real mode) do not suffer the cost of CPU-level slowdowns as the CPU-level instructions are not proxied or executing against an emulated architecture since the guest OS or hardware is providing the environment for the applications to run under. However access to many of the other resources on the system, such as devices and memory may be proxied or emulated in order to broker those shared services out to all the guests, which may cause some slow downs as compared to running outside of virtualization.
- ^ OS-level virtualization is described as "native" speed, however some groups have found overhead as high as 3% for some operations, but generally figures come under 1%, so long as secondary effects do not appear.
- ^ See for a paper comparing performance of paravirtualization approaches (e.g. Xen) with OS-level virtualization
- ^ Requires patches/recompiling.
- ^ Exceptional for lightweight, paravirtualized, single-user VM/CMS interactive shell: largest customers run several thousand users on even single prior models. For multiprogramming OSes like Linux on zSeries and z/OS that make heavy use of native supervisor state instructions, performance will vary depending on nature of workload but is near native. Hundreds into the low thousands of Linux guests are possible on a single machine for certain workloads.
Name Can boot an OS on another disk partition as guest USB support GUI Live memory allocation 3D acceleration Snapshots per VM Snapshot of running system Live migration Shared folders Shared clipboard KVM Yes Yes Yes Yes Yes (via AIGLX) Yes Yes Yes User Mode Linux Yes No No No No No Yes N/A Oracle VirtualBox-OSE (GPLv2) Partial (since version 1.4, but unsupported)  USB 1.1 Yes Yes OpenGL 2.0 DirectX 3D Yes branched Yes Yes Yes Yes Oracle VirtualBox-PUEL (pre-compiled, not free) Partial (since version 1.4, but unsupported)  USB 2.0 Yes Yes OpenGL 2.0 Yes branched Yes Yes Yes Yes Oracle VM Server for SPARC Yes USB 2.0 Yes Yes No Yes No Yes Yes No Virtual Iron 4.2 Yes Virtual PC 2007 No No Yes No No No Yes Yes Windows Virtual PC No partially Yes VirtualPC 7 for Mac Yes Yes Yes Yes No No Microsoft Virtual Server 2005 R2 No Yes No No ? Yes No Microsoft Hyper-V Server 2008 R2 Yes Partial support over remote desktop connections  Yes Yes DirectX 9.0c  branched Yes Yes Virtuozzo Yes Yes Yes Yes No Yes VMware ESX Server 3.0 atp Yes No ? Yes Yes VMware ESX Server 2.5.3 Yes No VMware ESX Server 4.0 (vSphere) Yes Yes Yes Yes Yes ? Yes Yes VMware Fusion 2.0 Yes Yes Yes No DirectX 9 Shader model 2 No VMware Server Yes Yes Yes Yes No 1 Yes No Yes Yes VMware Workstation 5.5 Yes Yes Yes Yes Experimental support for DirectX 8; also supported with VMGL Yes branched Yes No Yes Yes VMware Workstation 6.0 Yes Yes Yes Yes Experimental support for DirectX 8; Also supported with VMGL Yes branched Yes No Yes Yes VMware Workstation 7.0 Yes Yes Yes Yes Support for DirectX 9.0c Shader Model 3 and OpenGL 2.13D. Yes branched Yes No Yes Yes VMware Player No Yes Yes Yes supported with VMGL No No No Yes Wind River hypervisor Yes Yes Yes Yes Yes No Wind River VxWorks MILS Platform Yes Xen Yes Yes Yes Supported with VMGL ? Yes Yes z/VM Yes Not applicable with add-ons Yes No No z LPARs Yes Not applicable Yes Yes No No Zones Yes Yes Yes Yes No Name Can boot an OS on another disk partition as guest USB GUI Live memory allocation 3D acceleration Snapshots per VM Snapshot of running system Live migration Shared folders Shared clipboard
- ^ VirtualBox User Manual, Chapter 9.9; requires usage of VBoxManage internalcommands createrawvmdk which says:This is a development tool and shall only be used to analyse problems. It is completely unsupported and will change in incompatible ways without warning.
- ^ Windows Server 2008 R2 SP1 and Windows 7 SP1 have limited support for redirecting the USB protocol over RDP using RemoteFX.
- ^ Windows Server 2008 R2 SP1 adds accelerated graphics support for certain editions of Windows Server 2008 R2 SP1 and Windows 7 SP1 using RemoteFX.
This table is meant to outline restrictions in the software dictated by licensing or capabilities.
Name Maximum host physical processors (sockets) Maximum host cores per processor Maximum host memory Maximum host disk volume size Maximum number of guest VM running Maximum number of logical CPU per VM guest Maximum amount of memory per VM guest, 32/64 bit Maximum number of SCSI + IDE disks per VM guest Maximum disk size per VM guest Containers, or Zones 72 No limit 4TB No limit 8191 No limit No limit No limit No limit VMware Player 3.1 ? ? No limit N/A ? 8 8/32 GB ? 2 TB VMware Server 2.0 16 16 No limit N/A 64 2 8/8 GB 4 IDE; 60 SCSI 950 GB VMware vSphere Hypervisor (ESXi) 4.1 160 160 1 TB 2 TB minus 512 bytes 320 8 255/255 GB 4 IDE; 60 SCSI 2 TB minus 512 bytes VMware vSphere ESXi 5.0 160 160 2 TB 64 TB 512 32 1 TB 4 IDE; 60 SCSI 2 TB minus 512 bytes VirtualBox 4.0.x No limit ? No limit ? No limit ? No limit No limit 16 No limit 4 IDE; no limit SATA, SCSI, SAS 2 TB Hyper-V 2008 R2 64 64 1 TB No limit 384 4 64 GB 4 IDE; 256 SCSI 2 TB
Note: No limit means no enforced limit. For example, a VM with 1 TB of memory cannot fit in a host with only 8 GB memory and no memory swap disk, so it will have a limit of 8 GB physically.
- List of computer system emulators
- Comparison of application virtual machines
- Platform virtualization
- Popek and Goldberg virtualization requirements
- Virtual machine
- x86 virtualization
- ^ The list of platforms supported by Bochs. Retrieved on 2011-07-27.
- ^ Instructions on compiling Bochs. Retrieved on 2011-07-27.
- ^ a b Cooperative Linux FAQ. Retrieved on 2009-01-27.
- ^ a b QEMU Official OS Support List
- ^ Oracle VM VirtualBox® User Manual, Chapter 3: Configuring virtual machines | Mac OS X Server guests
- ^ Oracle and Virtual Iron
- ^ Can run a guest OS without modifying it, and hence is generally able to run any OS that could run on a physical machine the VM simulates
- ^ VMware Player FAQ. Retrieved on 2011-07-27.
- ^ VMware Player 3.1 EULA. Retrieved on 2011-07-27.
- ^ http://www.linux-kvm.com/content/running-windows-smp-guests
- ^ Imperas
- ^ http://www.cs.princeton.edu/~mef/research/vserver/paper.pdf
- ^ a b "Virtual Machine Manager". http://virt-manager.et.redhat.com/. Retrieved 2010-02-20.
- ^ "Sheepdog is a distributed storage system for KVM". http://www.osrg.net/sheepdog/. Retrieved 2010-05-20.
- ^ "KVM Migration". http://www.linux-kvm.org/page/Migration. Retrieved 2010-05-20.
- ^ a b "VirtualBox Changelog". http://www.virtualbox.org/wiki/Changelog-3.0. Retrieved 2009-06-30.
- ^ "VirtualBox Changelog". http://www.virtualbox.org/wiki/Changelog-4.1. Retrieved 2009-06-30.
- ^ a b "VirtualBox Changelog 3.1". http://www.virtualbox.org/wiki/Changelog-3.1. Retrieved 2010-10-01.
- ^ a b c d "VMGL (formerly Xen-GL)". http://www.cs.toronto.edu/~andreslc/xen-gl.
- ^ http://www.vmware.com/products/workstation/new.html
- ^ http://technet.microsoft.com/en-us/library/ff817581(WS.10).aspx
- ^ http://technet.microsoft.com/en-us/library/ff817578(WS.10).aspx
- ^ http://technet.microsoft.com/en-us/library/ff817602(WS.10).aspx
- ^  Getting Started Guide VMware Player 3.1
- ^  VMware Server User’s Guide VMware Server 2.0
- ^  Configuration Maximums VMware® vSphere 4.1
- ^  Configuration Maximums VMware® vSphere 5.0
- ^  Oracle VM VirtualBox User Manual. Accessed 2011-04-07
- ^  Requirements and Limits for Virtual Machines and Hyper-V in Windows Server 2008 R2
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