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This article is about what the mainstream server virtualization technologies in computer networks have. The editor thinks it is very practical, so share it with you as a reference and follow the editor to have a look.

Mainstream server virtualization technologies include KVM, Xen, and Hyper-V. KVM is an open source Linux native full virtualization solution based on virtualization extended X86 hardware; Xen is an open source virtual machine monitor; and Hyper-V is a hypervisor-based technology and a Microsoft virtualization product.

Mainstream server virtualization technologies include ()

A 、 VirtualBox

B 、 KVM

C 、 Xen

D 、 Hyper-V

Answer: B, C, D

Virtualization-KVM

1. Virtualized kvm development:

A new "virtual machine" solution developed by Israel's Qumranet organization in October 2006 and contributed to the open source world

KVM was included in Linux Kernel-2.6.20 for the first time in February 2007

In September 2008, Red Hat acquired Qumranet and acquired KVM's virtualization technology. In the past, Red Hat definitely added Xen to its default feature-- that was in 2006, because Xen technology was separated from kernel maintenance, perhaps because RHEL using Xen did not win much market in enterprise virtualization, or because Citrix was too close to Microsoft for a variety of reasons that led it to give up Xen. And one year after the formal adoption of KVM, it was announced that it would completely abandon Xen in the new product line and concentrate its resources and energy on KVM work.

In September 2009, Red Hat released version 5.4 of its enterprise Linux (RHEL5.4), adding KVM to the previous Xen virtualization mechanism.

In November 2010, Red Hat released version 6.0 of its enterprise Linux (RHEL6.0), which completely removes the default installation of Xen virtualization mechanism and provides only KVM virtualization mechanism

In early 2011, IBM, Red Hat's old partner, approached Red Hat and said that KVM was worth making more efforts to do. So in May, IBM and Red Hat, together with Hewlett-Packard and Intel, formed the Open Virtualization Alliance (Open Virtualization Alliance) to promote the image of KVM and speed up the introduction of KVM to the market, thus avoiding the dominance of VMware. When the alliance was founded, a spokesman for Red Hat said that everyone wanted to have an open source option in addition to VMware. The future cloud infrastructure will certainly be based on open source.

Since Linux 2.6.20, it has gradually replaced Xen and has been integrated into major releases of Linux, managed using Linux's own scheduler.

2. KVM-the full name is kernel-based virtual machine (Kernel-based Virtual Machine)

Is an open source software, kernel-based virtualization technology, is actually a virtualization module embedded in the system, by optimizing the kernel to use virtual technology, the kernel module makes Linux into a Hypervisor, and the virtual machine is managed by Linux's own scheduler.

KVM is an open source Linux native full virtualization solution based on X86 hardware of virtualization extensions (Intel VT or AMD-V). In KVM, the virtual machine is implemented as a regular Linux process, which is scheduled by the standard Linux scheduler, and each virtual CPU of the virtual machine is implemented as a conventional Linux process. This allows KMV to use the existing features of the Linux kernel. However, KVM itself does not perform any hardware simulation, and requires the client space program to set up the address space of a client virtual server through the / dev/kvm interface, provide it with a simulated Imando O, and map its video display back to the host display screen. The current application is QEMU.

Virtualization-Xen

Xen is an open source virtual machine monitor developed by the University of Cambridge. It intends to run up to 100 operating systems with full features on a single computer. The operating system must be explicitly modified ("ported") to run on Xen (but provide compatibility with user applications). This enables Xen to achieve high-performance virtualization without special hardware support.

Virtualization-Hyper-V

Hyper-V, a Microsoft virtualization product, is the first Microsoft to adopt hypervisor-based technologies similar to Vmware ESXi and Citrix Xen. This also means that Microsoft will compete more directly with VMware, the market pioneer, but in a different way.

Hyper-V is a system management program virtualization technology proposed by Microsoft, which can realize desktop virtualization. Hyper-V is originally scheduled for the first quarter of 2008 and will be released at the same time as Windows Server 2008. Hyper-V Server 2012 completed the release of the RTM version.

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