1111:, instead of certain architectural features. Through paravirtualization, Xen can achieve high performance even on its host architecture (x86) which has a reputation for non-cooperation with traditional virtualization techniques. Xen can run paravirtualized guests ("PV guests" in Xen terminology) even on CPUs without any explicit support for virtualization. Paravirtualization avoids the need to emulate a full set of hardware and firmware services, which makes a PV system simpler to manage and reduces the attack surface exposed to potentially malicious guests. On 32-bit x86, the Xen host kernel code runs in
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1130:, however, in Xen this is known as hardware virtual machine (HVM). HVM extensions provide additional execution modes, with an explicit distinction between the most-privileged modes used by the hypervisor with access to the real hardware (called "root mode" in x86) and the less-privileged modes used by guest kernels and applications with "hardware" accesses under complete control of the hypervisor (in x86, known as "non-root mode"; both root and non-root mode have Rings 0–3). Both Intel and
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modifications to gain many of the performance benefits of paravirtualized I/O. In current versions of Xen (up to 4.2) only fully virtualized HVM guests can make use of hardware facilities for multiple independent levels of memory protection and paging. As a result, for some workloads, HVM guests with PV drivers (also known as PV-on-HVM, or PVH) provide better performance than pure PV guests. Xen HVM has device emulation based on the
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paper. James Harper and the Xen open-source community have started developing free software paravirtualization drivers for
Windows. These provide front-end drivers for the Xen block and network devices and allow much higher disk and network performance for Windows systems running in HVM mode. Without
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To support embedded systems such as smartphone/ IoT with relatively scarce hardware computing resources, the Secure Xen ARM architecture on an ARM CPU was exhibited at Xen Summit on April 17, 2007, held in IBM TJ Watson. The first public release of Secure Xen ARM source code was made at Xen Summit on
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project to provide I/O virtualization to the virtual machines. The system emulates hardware via a patched QEMU "device manager" (qemu-dm) daemon running as a backend in dom0. This means that the virtualized machines see an emulated version of a fairly basic PC. In a performance-critical environment,
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Guest systems can run fully virtualized (which requires hardware support), paravirtualized (which requires a modified guest operating system), or fully virtualized with paravirtualized drivers (PVHVM). Most operating systems which can run on PCs can run as a Xen HVM guest. The following systems can
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60–300 ms to perform final synchronization before the virtual machine begins executing at its final destination, providing an illusion of seamless migration. Similar technology can serve to suspend running virtual machines to disk, "freezing" their running state for resumption at a later date.
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Administrators can "live migrate" Xen virtual machines between physical hosts across a LAN without loss of availability. During this procedure, the LAN iteratively copies the memory of the virtual machine to the destination without stopping its execution. The process requires a stoppage of around
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v7A and v8A virtualization extensions came with Xen 4.3. HVM extensions also often offer new instructions to allow direct calls by a paravirtualized guest/driver into the hypervisor, typically used for I/O or other operations needing high performance. These allow HVM guests with suitable minor
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Responsibilities of the hypervisor include memory management and CPU scheduling of all virtual machines ("domains"), and for launching the most privileged domain ("dom0") - the only virtual machine which by default has direct access to hardware. From the dom0 the hypervisor can be managed and
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as a
Collaborative Project. The Linux Foundation launched a new trademark for "Xen Project" to differentiate the project from any commercial use of the older "Xen" trademark. A new community website was launched at xenproject.org as part of the transfer. Project members at the time of the
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Makes it possible to use a dom0 Linux kernel, which has been implemented by using PVOps. A Linux kernel of version 2.6.31 has been modified for this purpose, because the official Linux kernel actually does not support the usage as dom0 kernel (date July 2010).
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ARM: previously supported under the XenARM project for older versions of ARM without virtualization extensions, such as the Cortex-A9. Currently supported since Xen 4.3 for newer versions of the ARM with virtualization extensions, such as the
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Third-party developers have built a number of tools (known as Xen
Management Consoles) to facilitate the common tasks of administering a Xen host, such as configuring, starting, monitoring and stopping of Xen guests. Examples include:
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completed its acquisition of XenSource, and the Xen
Project moved to the xen.org domain. This move had started some time previously, and made public the existence of the Xen Project Advisory Board (Xen AB), which had members from
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Virtualization also has benefits when working on development (including the development of operating systems): running the new system as a guest avoids the need to reboot the physical computer whenever a bug occurs.
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Finally, hardware appliance vendors may decide to ship their appliance running several guest systems, so as to be able to execute various pieces of software that require different operating systems.
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The Xen hypervisor is covered by the GNU General Public
Licence, so all of these versions contain a core of free software with source code. However, many of them contain proprietary additions.
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Xen can scale to 4095 physical CPUs, 256 VCPUs per HVM guest, 512 VCPUs per PV guest, 16 TB of RAM per host, and up to 1 TB of RAM per HVM guest or 512 GB of RAM per PV guest.
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440:, and his PhD student Keir Fraser. The first public release of Xen was made in 2003, with v1.0 following in 2004. Soon after, Pratt and Fraser along with other Cambridge alumni including
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these drivers all disk and network traffic has to be processed through QEMU-DM. Subsequently, Citrix has released under a BSD license (and continues to maintain) PV drivers for
Windows.
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492:. The Xen Advisory Board advises the Xen Project leader and is responsible for the Xen trademark, which Citrix has freely licensed to all vendors and projects that implement the Xen
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operating systems whereby the operating system is aware that it is running inside a virtual machine, and so makes hypercalls directly, rather than issuing privileged instructions.
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announcement included: Amazon, AMD, Bromium, CA Technologies, Calxeda, Cisco, Citrix, Google, Intel, Oracle, Samsung, and
Verizon. The Xen project itself is self-governing.
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1380:'s Academic Licensing Program. The terms of this license do not allow the publication of this port, although documentation of the experience appears in the original Xen
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Xen provides a form of virtualization known as paravirtualization, in which guests run a modified operating system. The guests are modified to use a special hypercall
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Virtualization shoot-out: Citrix, Microsoft, Red Hat, and VMware. The leading server virtualization contenders tackle InfoWorld's ultimate virtualization challenge
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CPUs that support virtualization make it possible to run unmodified guests, including proprietary operating systems (such as
Microsoft Windows). This is known as
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Solid libvirt support for libxl, new scalable event channel interface, hypervisor ABI for ARM declared stable, Nested
Virtualization on Intel hardware.
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Xen version 3.0 introduced the capability to run
Microsoft Windows as a guest operating system unmodified if the host machine's processor supports
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Some of the improvements: Support for more than 255 processors, better stability. Linux kernel v2.6.37 and onward support usage as dom0 kernel.
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Alternatively, Xen is distributed as an optional configuration of many standard operating systems. Xen is available for and distributed with:
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PV-on-HVM disk and network drivers are used during the normal guest operation, so that the emulated PC hardware is mostly used for booting.
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provided by Intel VT-x (formerly codenamed Vanderpool) or AMD-V (formerly codenamed Pacifica). During the development of Xen 1.x,
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1097:(paravirtualization with hardware virtualization): PV supported hardware-assisted virtualization with PV drivers for IO devices.
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Focused on improving code quality, security hardening, enablement of security appliances, and release cycle predictability.
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Improvements for the PCI passthrough and the power management. Xen ARM hypervisor source code released for ARM CPU support
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under which privileged instructions are provided by hardware virtualization instructions (if the host processor supports
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or XenServer (formerly Citrix Hypervisor, and before that Citrix XenServer, and before that XenSource's XenEnterprise).
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have contributed modifications to Xen to exploit their respective Intel VT-x and AMD-V architecture extensions. Use of
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1103:(PV in an HVM container): Fully paravirtualized Guest accelerated by hardware-assisted virtualization where available.
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2155:"Xen 3.2.0 Officially Released : VMblog.com - Virtualization Technology News and Information for Everyone"
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and large servers running IBM, HP, and other systems. Server virtualization can provide benefits such as:
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XL became the default toolstack. Support for up to 4095 host processors and up to 512 guest processors.
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Improved: security, live migrations, performances and workload. Hardware support (ARM and Intel Xeon).
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Intel Virtualization Technology: Software-only virtualization with the IA-32 and Itanium architectures
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and founding CEO Nick Gault created XenSource Inc. to turn Xen into a competitive enterprise product.
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2229:"Virtualisation: Xen is looking to catch up by releasing version 4 - The H Open: News and Features"
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Xen Project runs in a more privileged CPU state than any other software on the machine, except for
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496:. Citrix also used the Xen brand itself for some proprietary products unrelated to Xen, including
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guest systems can also help in computer-security research, allowing study of the effects of some
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On April 15, 2013, it was announced that the Xen Project was moved under the auspices of the
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XenServer (Formerly Citrix Hypervisor until 2023 and formerly Citrix XenServer until 2019)
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has the necessary packages available to support Xen, along with instructions on their Wiki.
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1455:(Open Source, within the Linux Foundation and Xen Project, originally a fork of XenServer)
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1004:
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1085:(hardware virtual machine): Fully hardware-assisted virtualization with emulated devices.
3378:"XPDDS18: Windows PV Drivers Project: Status and Updates - Paul Durrant, Citrix Systems"
2177:"Xen 3.3.0 hypervisor ready for download - The H: Open Source, Security and Development"
959:
Please help update this article to reflect recent events or newly available information.
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Hardware fault tolerance (through migration of a virtual machine to different hardware)
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PowerPC: previously supported under the XenPPC project, no longer active after Xen 3.2
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2862:"Analysis of the Intel Pentium's Ability to Support a Secure Virtual Machine Monitor"
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With 43 major new features, 4.5 includes the most updates in the project's history.
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2907:"The ARM Hypervisor — The Xen Project's Hypervisor for the ARM architecture"
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Xen's support for virtual machine live migration from one host to another allows
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4144:
3997:
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1261:-based distributions can function as dom0 and domU from Nevada build 75 onwards.
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321:
2340:"Best Quality and Quantity of Contributions in the New Xen Project 4.6 Release"
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provides the necessary packages with detailed setup instructions on their Wiki.
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1726:"Secure Architecture and Implementation of Xen on the ARM for Mobile Devices"
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Support for legacy software as well as new OS instances on the same computer
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Virtual machine monitors (also known as hypervisors) also often operate on
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1091:: Fully hardware-assisted virtualization with PV drivers for IO devices.
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27:
This article is about the virtualization software. For other uses, see
3266:
1537:, a TXT-based integrity system for the Linux kernel and Xen hypervisor
1164:
The Xen hypervisor has been ported to a number of processor families:
669:
Contains a first version of the "Xen Client Initiative", shortly XCI.
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3976:
3971:
3935:
3874:
3814:
3741:
3726:
3721:
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3634:
3619:
3576:
3171:"Xen dom0 support in Lucid - Kernel team discussions - ArchiveOrange"
2203:"Xen.org Announces Release Of Xen 3.4 Hypervisor | Citrix Blogs"
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against software failures (through rapid bootstrapping or rebooting)
381:. User domains may either be traditional operating systems, such as
5095:
3444:
Huawei to virtual world: Give us your desktops and no-one gets hurt
3104:
2018:
1995:
1194:
Xen can be shipped in a dedicated virtualization platform, such as
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4997:
4672:
4129:
3784:
3736:
3711:
3591:
1593:
1534:
1428:
Orchestrate also manages Xen virtual machines for Xen shipping in
1347:
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1228:
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Xen offers five approaches to running the guest operating system:
1007:
use Xen as the primary VM hypervisor for their product offerings.
587:
469:
394:
374:
340:
293:
97:
62:
4918:
3218:
1808:"Citrix Systems » Citrix Completes Acquisition of XenSource"
4982:
4043:
3819:
3751:
3731:
3683:
3310:
2873:
Gil Neiger, Amy Santoni, Felix Leung, Dion Rodgers, Rich Uhlig.
1406:
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331:
The Xen Project community develops and maintains Xen Project as
325:
5099:
4922:
4271:
3505:
3060:
519:, Xen support for dom0 and domU exists in the mainline kernel.
3930:
3629:
1131:
939:
643:
PCI passthrough and ACPI S3 standby mode for the host system.
465:
317:
309:
1902:
1079:(paravirtualization): Virtualization-aware Guest and devices.
722:
Experimental ARM support. NUMA-aware scheduling. Support for
339:(GPL), version 2. Xen Project is currently available for the
1435:
1273:
uses Xen to isolate applications for a more secure desktop.
257:
3489:
2728:"Xen Project - Guest VM Images - OrionVM PV-HVM Templates"
2111:"[Xen-devel] FW: Xen 3.0.4 released! - Xen Source"
1969:"Xen celebrates full dom0 and domU support in Linux 3.0 –"
231:
3401:"XenServer split from Citrix, promises per-socket prices"
1267:
10.x to 12.x: only 64-bit hosts are supported since 12.1;
1061:
without the possibility of compromising the host system.
612:
Graphical framebuffer support for paravirtualized guests.
2334:
2332:
2330:
1216:) that can be run from removable media, like USB sticks.
3291:. The FreeBSD Documentation Project. September 22, 2016
1231:(since version 4.0 "etch") and many of its derivatives;
2089:"[Xen-devel] Xen 3.0.3 released! - Xen Source"
2995:"Porting Xen Paravirtualization to MIPS Architecture"
260:
254:
4318:
Comparison of open-source and closed-source software
2205:. Community.citrix.com. May 18, 2009. Archived from
2133:"[Xen-devel] Xen 3.1 released! - Xen Source"
1415:
natively supports Xen as a Hypervisor/Compute target
5205:
5179:
5133:
5067:
5011:
4965:
4824:
4758:
4686:
4556:
4533:
4495:
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4305:
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4120:
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4016:
3990:
3959:
3908:
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3777:
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3549:
2752:. Rackspace.com. September 13, 2011. Archived from
2519:"Xen Project 4.8.1 is available | Xen Project Blog"
2461:"Less is More in the New Xen Project 4.5 Release –"
2043:. XenSource, Inc. December 10, 2005. Archived from
1766:"Secure Xen on ARM: Source Code Release and Update"
416:host operating system into the host domain (dom0).
251:
226:
214:
202:
192:
157:
125:
103:
87:
70:
2891:Extending Xen with Intel Virtualization Technology
2832:"Choosing a virtualization mode (PV versus PVHVM)"
276:, providing services that allow multiple computer
3265:. Wiki.freebsd.org. June 25, 2012. Archived from
284:concurrently. It was originally developed by the
1168:Intel: IA-32, IA-64 (before version 4.2), x86-64
2590:"What's New in the Xen Project Hypervisor 4.11"
2567:"What's New in the Xen Project Hypervisor 4.10"
2455:
2453:
2179:. H-online.com. August 25, 2008. Archived from
1810:. Citrix Systems. July 12, 2007. Archived from
1034:Secure separations of virtual operating systems
452:, a Cambridge alumnus, in Samsung Electronics.
370:unprivileged domains ("domU") can be launched.
3543:Comparison of platform virtualization software
2545:"What's New in the Xen Project Hypervisor 4.9"
2390:. Blog.xen.org. March 10, 2014. Archived from
2289:. Blog.xen.org. March 25, 2011. Archived from
1018:Consolidation leading to increased utilization
5111:
4934:
4283:
3517:
2838:. Rackspace. January 12, 2016. Archived from
2231:. H-online.com. April 9, 2010. Archived from
8:
4323:Comparison of source-code-hosting facilities
4226:Generic Network Virtualization Encapsulation
3337:(PDF). University of Cambridge SOSP'03 paper
2364:. Blog.xen.org. July 9, 2013. Archived from
1971:. Blog.xen.org. May 30, 2011. Archived from
424:Xen originated as a research project at the
5274:University of Cambridge Computer Laboratory
3241:"Understanding the Virtualization Spectrum"
2776:"Understanding the Virtualization Spectrum"
286:University of Cambridge Computer Laboratory
82:University of Cambridge Computer Laboratory
5264:History of computing in the United Kingdom
5118:
5104:
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1409:and virt-man offer graphical VM management
526:
373:The dom0 domain is typically a version of
181:
133:
51:
42:
38:
3455:Crucible - Secure Embedded Virtualization
2113:. Lists.xenproject.org. December 20, 2006
2069:. lists.xenproject.org. December 14, 2005
987:(from August 2006 to November 2017), IBM
2702:"Fujitsu's global cloud launches in Aus"
2091:. Lists.xenproject.org. October 17, 2006
3173:. Web.archiveorange.com. Archived from
3149:"Xen in Qubes OS Security Architecture"
3129:. Wiki.xenproject.org. November 8, 2011
1687:. Wiki.xenproject.org. February 8, 2007
1587:
1585:
1562:
1560:
1556:
1321:operate as paravirtualized Xen guests:
3197:"Xen - Community Ubuntu Documentation"
1925:"Linux Foundation Xen Project Members"
1616:"Xen Project 4.19 Release Notes - Xen"
1237:11 includes experimental host support.
3880:System Center Virtual Machine Manager
2864:, 9th Usenix Security Symposium, 2000
2669:"CloudLayer Computing vs. Amazon EC2"
979:companies use hypervisors to provide
594:The releases up to 3.0.4 also added:
335:, subject to the requirements of the
7:
4846:Microsoft Open Specification Promise
4193:Distributed Overlay Virtual Ethernet
3289:"FreeBSD 11.0-RELEASE Release Notes"
3199:. Help.ubuntu.com. September 5, 2012
2700:Suzanne Tindal (February 28, 2011).
2135:. Lists.xenproject.org. May 18, 2007
2017:Jonathan Corbet (December 6, 2005).
1994:Jonathan Corbet (November 5, 2004).
1685:"OSCompatibility - Xen Project Wiki"
1506:Free and open-source software portal
4313:Alternative terms for free software
3332:"Xen and the Art of Virtualization"
1592:Jonathan Corbet (October 2, 2003).
1333:in 32-bit, or 64-bit through PVHVM;
4653:Python Software Foundation License
3604:LDoms / Oracle VM Server for SPARC
3425:Mikael Lindholm (April 25, 2019).
2881:, Volume 10 Issue 03, August 2006.
2342:. Xenproject.org. October 13, 2015
1570:. SourceForge.net. October 2, 2003
1115:, while the hosted domains run in
288:and is now being developed by the
25:
5279:Virtualization software for Linux
5141:Cloud Native Computing Foundation
4716:Definition of Free Cultural Works
4333:Free software project directories
4259:List of computer system emulators
4160:Symantec Workspace Virtualization
2704:. ZDNet Australia. Archived from
2632:Kurth, Lars (December 18, 2019).
1421:also supports Xen as a Hypervisor
4959:List of mergers and acquisitions
4903:
4902:
4892:
4353:Open-source software development
3427:"Citrix Hypervisor 8.0 is here!"
2952:. Xen Project. December 17, 2012
2610:Gross, Juergen (April 2, 2019).
2588:Gross, Juergen (July 10, 2018).
2485:. Xenproject.org. April 12, 2017
2483:"Xen Project 4.8.1 is available"
2463:. Blog.xen.org. January 15, 2015
1498:
1303:, but no dom0-capable kernel in
1128:hardware-assisted virtualization
944:
247:
5166:Open Source Security Foundation
4711:Debian Free Software Guidelines
4543:Free Software Movement of India
3311:"xen(4) - OpenBSD Manual Pages"
2807:"Xen virtualization on FreeBSD"
2414:"Xen Project 4.4 Release Notes"
1442:and Citrix Hypervisor platforms
1045:and the avoidance of downtime.
5192:Core Infrastructure Initiative
3468:Paul Venezia (April 13, 2011)
2993:Mashable (September 4, 2012).
2974:. Xen Project. August 15, 2010
2505:"Xen Project 4.7 Feature List"
2260:(PDF). Xen.org. Archived from
1947:"Project Governance (Updated)"
1594:"The first stable Xen release"
1255:can function as domU and dom0.
1208:offers a minimal dom0 system (
928:Xen Project 4.19 Release Notes
915:Xen Project 4.18 Release Notes
902:Xen Project 4.17 Release Notes
889:Xen Project 4.16 Release Notes
876:Xen Project 4.15 Release Notes
863:Xen Project 4.14 Release Notes
850:Xen Project 4.13 Release Notes
837:Xen Project 4.12 Release Notes
824:Xen Project 4.11 Release Notes
811:Xen Project 4.10 Release Notes
1:
4701:Contributor License Agreement
4515:Open-source-software movement
4299:Free and open-source software
2507:. Xen project. June 24, 2016.
1355:(gnumach-1-branch-Xen-branch)
993:Fujitsu Global Cloud Platform
798:Xen Project 4.9 Release Notes
333:free and open-source software
5259:Free virtualization software
5254:Cross-platform free software
4872:The Cathedral and the Bazaar
4726:The Free Software Definition
3991:Virtual kernel architectures
3263:"FreeBSD/Xen - FreeBSD Wiki"
2067:"AMD SVM Xen port is public"
1861:(PDF). Xen.org. June 1, 2008
1787:"XenSummit Speaker Profiles"
1724:Suh, Sang-bum (April 2007).
1519:Kernel-based Virtual Machine
1277:SUSE Linux Enterprise Server
4776:Mozilla software rebranding
4741:Permissive software license
3127:"XenDom0Kernels - Xen Wiki"
2313:"XenParavirtOps - Xen Wiki"
2041:"XenSource: Press Releases"
1764:Suh, Sang-bum (June 2008).
412:, and then usually loads a
76:Keir Fraser, Steven Hand,
5295:
4781:Proprietary device drivers
4731:The Open Source Definition
1881:"Linux Foundation Project"
1376:to Xen — made possible by
1185:: XLP832 experimental port
337:GNU General Public License
26:
5269:Linux Foundation projects
5187:Open Container Initiative
4956:
4888:
4866:Source-available software
4766:Digital rights management
4251:
3805:Parallels Desktop for Mac
3540:
2836:Rackspace Support Network
953:This article needs to be
515:Since version 3.0 of the
404:Xen Project boots from a
153:
121:
50:
41:
5171:Overture Maps Foundation
4861:Shared Source Initiative
4658:Shared Source Initiative
4611:Free Software Foundation
4548:Free Software Foundation
4398:Configuration management
3810:Parallels Server for Mac
3790:Microsoft Virtual Server
2879:Intel Technology Journal
2634:"What's new in Xen 4.13"
2612:"WHAT'S NEW IN XEN 4.12"
1903:"XenProject.org Website"
1747:"Xen Summit Boston 2008"
1639:"What's New In XEN 4.12"
1637:jgross (April 2, 2019).
1478:(discontinued by Oracle)
1468:Oracle VM Server for x86
1402:cloud management toolkit
1309:12.04 "Precise Pangolin"
1287:Oracle VM Server for x86
977:Internet hosting service
4796:SCO/Linux controversies
4215:Virtual security switch
4155:Remote Desktop Services
4107:Remote Desktop Services
4102:Citrix Virtual Desktops
4017:Related kernel features
1707:"Xen Summit April 2007"
1366:hardware virtualization
1068:Types of virtualization
981:virtual private servers
630:for HVM guests, XenAPI
426:University of Cambridge
280:to execute on the same
5213:Open Mainframe Project
4696:Comparison of licenses
4505:Free software movement
4220:Virtual Extensible LAN
3960:Application containers
3921:iCore Virtual Accounts
2950:"Xen 4.2 Feature List"
2928:"Xen Release Features"
2436:"Xen 4.4 Feature List"
1794:Xen Summit Boston 2008
600:AMD SVM virtualization
586:Support for the Intel
109:; 20 years ago
4771:License proliferation
3795:Parallels Workstation
3657:VMware Infrastructure
3243:. Wiki.xenproject.org
3177:on September 13, 2011
2674:(PDF). Archived from
2438:. Wiki.xenproject.org
2416:. Wiki.xenproject.org
2362:"Xen 4.3 released! –"
2315:. Wiki.xenproject.org
1883:. LinuxFoundation.org
1482:Crucible (hypervisor)
1359:Plan 9 from Bell Labs
455:On October 22, 2007,
358:Software architecture
140:; 45 days ago
4856:Open-source hardware
4791:Proprietary software
4786:Proprietary firmware
4487:Formerly open-source
4482:Formerly proprietary
4348:Open-source software
3061:"Xen - FreeBSD Wiki"
3041:. Wiki.archlinux.org
2681:on December 12, 2014
2388:"Xen 4.4 releases –"
2287:"Xen 4.1 releases –"
2047:on December 10, 2005
1305:8.10 "Intrepid Ibex"
270:free and open-source
107:October 2, 2003
29:Xen (disambiguation)
4736:Open-source license
4338:Gratis versus libre
4135:Citrix Virtual Apps
4097:Citrix Virtual Apps
3951:Workload Partitions
3762:Virtual DOS machine
3405:www.theregister.com
3357:"Xen Windows GplPv"
3269:on October 12, 2012
3019:. Aur.archlinux.org
2842:on January 26, 2018
2786:on February 5, 2023
2756:on October 17, 2012
2708:on October 31, 2014
2569:. December 12, 2017
2523:blog.xenproject.org
2255:"Xen 4.0 Datasheet"
1814:on February 6, 2012
1447:Commercial versions
1279:(since version 10);
1089:HVM with PV drivers
581:Intel VT technology
438:Computer Laboratory
5197:OpenAPI Initiative
3941:Solaris Containers
3850:VMware Workstation
3757:Windows on Windows
3063:. wiki.freebsd.org
2860:Robin and Irvine,
2657:. August 25, 2006.
2293:on August 29, 2011
2019:"Xen 3.0 released"
1996:"Xen 2.0 released"
1856:"Trademark Policy"
1530:Virtual disk image
1472:Thinsy Corporation
1432:Enterprise Server.
1370:Microsoft Research
1301:8.04 "Hardy Heron"
1249:(since version 4);
1021:Rapid provisioning
911:November 23, 2023
898:December 14, 2022
846:December 18, 2019
807:December 12, 2017
387:x86 virtualization
292:with support from
72:Original author(s)
5231:
5230:
5161:Presto Foundation
5151:OpenJS Foundation
5093:
5092:
5080:Mark B. Templeton
5019:Apache CloudStack
4916:
4915:
4816:Trusted Computing
4806:Software security
4754:
4753:
4435:Operating systems
4343:Long-term support
4265:
4264:
4255:List of emulators
4083:
4082:
3893:
3892:
3863:
3862:
3717:Cooperative Linux
3609:Logical partition
3399:Sharwood, Simon.
3085:. Wiki.gentoo.org
2805:Roger Pau Monne.
2655:"Amazon EC2 Beta"
2394:on March 10, 2014
2235:on March 14, 2012
2209:on March 15, 2011
2183:on March 14, 2012
1484:by Star Lab Corp.
1419:Apache CloudStack
1285:(since 2013 with
974:
973:
933:
932:
885:December 2, 2021
705:September 8, 2012
448:June 24, 2008 by
383:Microsoft Windows
282:computer hardware
278:operating systems
240:
239:
34:Type-1 hypervisor
16:(Redirected from
5286:
5127:Linux Foundation
5120:
5113:
5106:
5097:
5085:Kirill Tatarinov
4943:
4936:
4929:
4920:
4906:
4905:
4896:
4801:Software patents
4684:
4596:Creative Commons
4455:Web applications
4292:
4285:
4278:
4269:
3931:Linux Containers
3906:
3697:
3562:
3526:
3519:
3512:
3503:
3498:
3493:
3492:
3490:Official website
3457:
3452:
3446:
3441:
3435:
3434:
3422:
3416:
3415:
3413:
3411:
3396:
3390:
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3090:
3079:
3073:
3072:
3070:
3068:
3057:
3051:
3050:
3048:
3046:
3039:"Xen - ArchWiki"
3035:
3029:
3028:
3026:
3024:
3017:"AUR (en) - xen"
3013:
3007:
3006:
3004:
3002:
2997:. Slideshare.net
2990:
2984:
2983:
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2811:
2802:
2796:
2795:
2793:
2791:
2782:. Archived from
2772:
2766:
2765:
2763:
2761:
2746:
2740:
2739:
2737:
2735:
2724:
2718:
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2576:
2574:
2563:
2557:
2556:
2554:
2552:
2541:
2535:
2534:
2532:
2530:
2525:. April 12, 2017
2515:
2509:
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2494:
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2423:
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2384:
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2377:
2375:
2373:
2368:on July 13, 2013
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2014:
2008:
2007:
2005:
2003:
1991:
1985:
1984:
1982:
1980:
1965:
1959:
1958:
1956:
1954:
1949:. XenProject.org
1943:
1937:
1936:
1934:
1932:
1927:. XenProject.org
1921:
1915:
1914:
1912:
1910:
1905:. XenProject.org
1899:
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1601:
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1564:
1508:
1503:
1502:
1501:
1339:, through PVHVM;
1123:(applications).
969:
966:
960:
948:
947:
940:
775:
762:
761:October 13, 2015
749:
748:January 17, 2015
736:
719:
706:
693:
679:
666:
653:
640:
639:January 17, 2008
624:
605:Support for the
598:Support for the
574:
573:December 5, 2005
558:
557:November 5, 2004
546:
527:
509:Linux Foundation
486:Sun Microsystems
352:instruction sets
290:Linux Foundation
267:
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185:
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94:Linux Foundation
55:
46:
39:
21:
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5288:
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5285:
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5234:
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5232:
5227:
5201:
5175:
5134:Sub-foundations
5129:
5124:
5094:
5089:
5063:
5024:Citrix WinFrame
5007:
4961:
4952:
4947:
4917:
4912:
4884:
4851:Open-core model
4826:
4820:
4750:
4688:
4682:
4552:
4529:
4491:
4374:
4367:
4301:
4296:
4266:
4261:
4247:
4231:
4179:
4150:Microsoft App-V
4116:
4079:
4053:
4012:
4003:User-mode Linux
3986:
3955:
3900:
3889:
3859:
3773:
3688:
3553:
3545:
3536:
3530:
3488:
3487:
3484:
3465:
3463:Further reading
3460:
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3449:
3442:
3438:
3424:
3423:
3419:
3409:
3407:
3398:
3397:
3393:
3383:
3381:
3380:. June 29, 2018
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2748:
2747:
2743:
2733:
2731:
2730:. April 1, 2012
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2547:. June 28, 2017
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2268:
2267:on May 10, 2012
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1975:on June 7, 2011
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1618:. July 29, 2024
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1026:fault tolerance
1005:Rackspace Cloud
970:
964:
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938:
786:April 12, 2017
773:
760:
747:
734:
717:
704:
691:
677:
664:
652:August 24, 2008
651:
638:
622:
583:for HVM guests.
572:
556:
545:October 2, 2003
544:
525:
523:Release history
474:Hewlett-Packard
434:senior lecturer
422:
414:paravirtualized
399:paravirtualized
360:
250:
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149:
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104:Initial release
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5:
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5249:Citrix Systems
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4988:RightSignature
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4950:Citrix Systems
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4388:Bioinformatics
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4170:VMware ThinApp
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4112:VMware Horizon
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3645:VMware vSphere
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3584:
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3537:
3533:Virtualization
3531:
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3528:
3521:
3514:
3506:
3500:
3499:
3483:
3482:External links
3480:
3479:
3478:
3464:
3461:
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3458:
3447:
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3391:
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3221:. Wiki.xen.org
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2780:xenproject.org
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2009:
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1825:
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1664:"Xen Overview"
1655:
1643:xenproject.org
1629:
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1289:, before with
1280:
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1080:
1069:
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1043:load balancing
1039:
1038:
1035:
1032:
1029:
1022:
1019:
991:, Liquid Web,
972:
971:
952:
950:
943:
937:
934:
931:
930:
925:
924:July 29, 2024
922:
918:
917:
912:
909:
905:
904:
899:
896:
892:
891:
886:
883:
879:
878:
873:
872:April 8, 2021
870:
866:
865:
860:
859:July 24, 2020
857:
853:
852:
847:
844:
840:
839:
834:
833:April 2, 2019
831:
827:
826:
821:
820:July 10, 2018
818:
814:
813:
808:
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801:
800:
795:
794:June 28, 2017
792:
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787:
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779:
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771:
767:
766:
763:
758:
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753:
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741:
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735:March 10, 2014
732:
728:
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720:
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710:
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698:
697:
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692:March 25, 2011
689:
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671:
670:
667:
662:
658:
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649:
645:
644:
641:
636:
632:
631:
628:Live migration
625:
620:
616:
615:
614:
613:
610:
603:
592:
591:
584:
575:
570:
566:
565:
564:of PV guests.
562:Live migration
559:
554:
550:
549:
547:
542:
538:
537:
534:
531:
524:
521:
457:Citrix Systems
421:
418:
359:
356:
238:
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228:
224:
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138:/ 29 July 2024
131:
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127:Stable release
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56:
48:
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10:
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4:
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2:
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5267:
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5260:
5257:
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5244:2003 software
5242:
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5146:Cloud Foundry
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5132:
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5004:
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4978:Citrix Online
4976:
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4970:
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4964:
4960:
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4879:Revolution OS
4876:
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4873:
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4867:
4864:
4862:
4859:
4857:
4854:
4852:
4849:
4847:
4844:
4842:
4841:
4840:GNU Manifesto
4837:
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4812:
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4779:
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4769:
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4757:
4747:
4746:Public domain
4744:
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4535:Organisations
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4430:Office suites
4428:
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4328:Free software
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4058:Orchestration
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3926:Linux-VServer
3924:
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3913:
3911:
3909:OS containers
3907:
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3845:VMware Server
3843:
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3840:VMware Fusion
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3067:September 28,
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2930:. Xen Project
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609:architecture.
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65:distributions
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5075:Ed Iacobucci
5053:
4966:Subsidiaries
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4721:Free license
4467:Android apps
4210:Open vSwitch
4199:Ethernet VPN
3916:FreeBSD jail
3885:Virt-manager
3830:Virtual Iron
3661:
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3175:the original
3165:
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3143:
3131:. Retrieved
3121:
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3107:. Netbsd.org
3105:"NetBSD/xen"
3099:
3087:. Retrieved
3077:
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3055:
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3033:
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2197:
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2181:the original
2171:
2159:. Retrieved
2157:. VMblog.com
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2115:. Retrieved
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2083:
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1812:the original
1802:
1796:. June 2008.
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1753:. June 2008.
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1679:
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1642:
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1620:. Retrieved
1610:
1598:. Retrieved
1572:. Retrieved
1487:
1476:Virtual Iron
1464:FusionSphere
1405:On openSUSE
1392:
1363:
1319:
1206:Alpine Linux
1200:
1193:
1163:
1160:Availability
1155:
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1125:
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724:Open vSwitch
718:July 9, 2013
665:May 18, 2009
623:May 18, 2007
593:
517:Linux kernel
514:
506:
454:
450:Sang-bum Suh
446:
442:Simon Crosby
423:
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372:
368:
361:
330:
245:(pronounced
242:
241:
145:29 July 2024
132:4.19.0
89:Developer(s)
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5223:Hyperledger
5180:Initiatives
5034:GoToMeeting
4811:Tivoization
4450:Video games
4425:Mathematics
4145:InstallFree
4122:Application
3998:Rump kernel
3778:Independent
3747:SheepShaver
3707:Basilisk II
3700:Specialized
3640:VMware ESXi
3556:hypervisors
3431:Citrix Blog
3341:October 18,
3295:October 23,
3273:October 18,
3219:"PV on HVM"
3203:October 18,
3181:January 22,
3001:January 22,
2978:January 22,
2956:January 22,
2934:October 18,
2846:January 25,
2760:October 18,
2750:"Cloud FAQ"
2712:October 11,
2595:January 17,
2467:January 17,
2346:October 13,
2297:October 18,
2271:October 18,
2239:October 18,
2213:October 18,
2187:October 18,
2161:October 18,
2051:October 18,
2025:October 18,
2002:October 18,
1979:October 18,
1834:"Trademark"
1818:October 26,
1773:Xen Project
1751:Xen Project
1733:Xen Project
1711:Xen Project
1600:October 18,
1574:October 18,
1541:VMware ESXi
1259:OpenSolaris
602:extensions.
322:Bitdefender
5238:Categories
5039:GoToAssist
4759:Challenges
4477:Commercial
4460:E-commerce
4445:Television
4253:See also:
4243:BlueStacks
4070:Kubernetes
4065:Amazon ECS
4039:namespaces
3835:Virtual PC
3825:VirtualBox
3625:Proxmox VE
3615:LynxSecure
3151:. xenp.org
1552:References
1514:CloudStack
1430:SUSE Linux
1400:OpenNebula
1389:Management
1374:Windows XP
1220:Arch Linux
1177:Cortex-A15
1012:mainframes
985:Amazon EC2
502:XenDesktop
494:hypervisor
406:bootloader
391:Intel VT-x
274:hypervisor
232:xenproject
209:Hypervisor
193:Written in
159:Repository
114:2003-10-02
61:and three
5156:LF Energy
5059:XenClient
5029:Cloud.com
4993:ShareFile
4689:standards
4687:Types and
4668:Unlicense
4663:Sleepycat
4497:Community
4075:OpenShift
3946:Virtuozzo
3899:Operating
3667:XenServer
3475:InfoWorld
3433:. Citrix.
3247:April 12,
3225:April 12,
3155:April 12,
3089:April 12,
3045:April 12,
3023:April 12,
2895:intel.com
2617:April 29,
2573:April 26,
2551:April 26,
2442:March 10,
2420:March 10,
2398:March 10,
2021:. Lwn.net
1998:. Lwn.net
1836:. Xen.org
1622:August 1,
1596:. Lwn.net
1525:OpenStack
1438:for both
1426:PlateSpin
1424:Novell's
1413:OpenStack
1378:Microsoft
1051:Sandboxed
989:SoftLayer
430:Ian Pratt
78:Ian Pratt
18:XenServer
5206:Projects
5044:GoToMyPC
5012:Products
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4908:Category
4825:Related
4706:Copyleft
4626:GNU LGPL
4621:GNU AGPL
4586:Beerware
4581:Artistic
4558:Licenses
4525:Advocacy
4472:iOS apps
4413:Wireless
4408:Graphics
4375:packages
4373:Software
4363:Timeline
4236:See also
4228:(GENEVE)
3597:KubeVirt
3551:Hardware
3535:software
3384:June 26,
3362:June 26,
2972:"XenPPC"
2912:April 6,
2816:April 6,
2790:March 9,
2734:June 27,
2685:April 5,
2372:July 16,
1669:April 5,
1546:Qubes OS
1492:See also
1353:GNU Hurd
1271:Qubes OS
1265:openSUSE
1148:Features
1024:Dynamic
965:May 2016
530:Version
410:GNU GRUB
408:such as
389:, e.g.,
364:firmware
4973:Ardence
4834:Forking
4616:GNU GPL
4510:History
4440:Routing
4403:Drivers
4358:Outline
4306:General
4222:(VXLAN)
4185:Network
4089:Desktop
4049:seccomp
4029:cgroups
4008:vkernel
3799:Extreme
3769:Win4Lin
3679:XtratuM
3582:Hyper-V
3410:May 29,
3133:June 8,
3111:June 8,
2489:June 1,
2319:June 8,
2139:June 8,
2117:June 8,
2095:June 8,
2073:June 8,
1865:June 8,
1840:June 8,
1691:June 8,
1337:OpenBSD
1331:FreeBSD
1299:(since
1291:Sun xVM
1283:Solaris
1235:FreeBSD
1210:Busybox
1001:OrionVM
955:updated
607:PowerPC
482:Red Hat
436:in the
428:led by
420:History
302:Arm Ltd
272:type-1
268:) is a
227:Website
216:License
176:/?p=xen
174:/gitweb
168:xenbits
143: (
112: (
5068:People
4898:Portal
4827:topics
4648:Python
4571:Apache
4520:Events
4420:Health
4393:Codecs
4201:(EVPN)
4195:(DOVE)
4175:ZeroVM
4140:Dalvik
4034:chroot
4024:BrandZ
3977:lmctfy
3972:Podman
3967:Docker
3936:OpenVZ
3901:system
3875:Ganeti
3854:Player
3815:PearPC
3742:PikeOS
3727:DOSEMU
3722:DOSBox
3693:Hosted
3672:XCP-ng
3650:vCloud
3635:SIMMON
3620:PikeOS
3611:(LPAR)
3577:CP/CMS
3565:Native
1953:May 3,
1931:May 3,
1909:May 3,
1887:May 3,
1648:May 6,
1462:Huawei
1453:XCP-ng
1440:XCP-ng
1343:NetBSD
1316:Guests
1307:until
1297:Ubuntu
1253:NetBSD
1247:Mageia
1241:Gentoo
1226:Debian
1214:UClibc
1196:XCP-ng
1121:Ring 3
1117:Ring 1
1113:Ring 0
997:Linode
783:4.8.1
536:Notes
498:XenApp
490:Oracle
478:Novell
462:Citrix
397:), or
345:x86-64
306:Huawei
298:Citrix
59:NetBSD
5218:SONiC
5049:Podio
4998:Wrike
4673:WTFPL
4383:Audio
4205:NVGRE
4165:Turbo
4130:Ceedo
3868:Tools
3785:bhyve
3737:86Box
3712:Bochs
3592:oVirt
3572:Adeos
3335:(PDF)
3083:"Xen"
2812:(PDF)
2810:(PDF)
2679:(PDF)
2672:(PDF)
2265:(PDF)
2258:(PDF)
1859:(PDF)
1790:(PDF)
1769:(PDF)
1729:(PDF)
1568:"Xen"
1535:tboot
1521:(KVM)
1348:MINIX
1326:Linux
1229:Linux
1190:Hosts
1095:PVHVM
1055:virus
921:4.19
908:4.18
895:4.17
882:4.16
869:4.15
856:4.14
843:4.13
830:4.12
817:4.11
804:4.10
588:IA-64
470:Intel
395:AMD-V
375:Linux
341:IA-32
294:Intel
221:GPLv2
98:Intel
63:Linux
4983:Net6
4678:zlib
4601:CDDL
4576:APSL
4044:eBPF
3820:QEMU
3752:SIMH
3732:PCem
3684:z/VM
3412:2023
3386:2019
3364:2019
3343:2012
3318:2017
3297:2016
3275:2012
3249:2018
3227:2018
3205:2012
3183:2014
3157:2018
3135:2013
3113:2013
3091:2018
3069:2015
3047:2018
3025:2018
3003:2014
2980:2014
2958:2014
2936:2012
2914:2015
2848:2018
2818:2015
2792:2022
2762:2012
2736:2014
2714:2011
2687:2015
2641:2019
2619:2019
2597:2018
2575:2018
2553:2018
2531:2018
2491:2017
2469:2015
2444:2014
2422:2014
2400:2014
2374:2013
2348:2015
2321:2013
2299:2012
2273:2012
2241:2012
2215:2012
2189:2012
2163:2012
2141:2013
2119:2013
2097:2013
2075:2013
2053:2012
2027:2012
2004:2012
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1955:2013
1933:2013
1911:2013
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1867:2013
1842:2012
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1693:2013
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1650:2019
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1602:2012
1576:2012
1407:YaST
1398:The
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1183:MIPS
1141:QEMU
1059:worm
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147:)
116:)
31:.
20:)
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