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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.
QEMU integrates several services to allow the host and guest systems to communicate for example: an integrated SMB server and network-port redirection (to allow incoming connections to the virtual machine). It can also boot Linux kernels without a bootloader. QEMU does not depend on the presence of graphical output methods on the host system.
Kernel-based Virtual Machine (KVM) is a free and open-source virtualization module in the Linux kernel that allows the kernel to function as a hypervisor. It was merged into the mainline Linux kernel in version 2.6.20, which was released on February 5, 2007. [ 1 ]
GNOME Boxes was initially introduced as beta software in GNOME 3.3 (development branch for 3.4) as of Dec 2011, [5] and as a preview release in GNOME 3.4. [6] Its primary functions were as a virtual machine manager, remote desktop client (over VNC), and remote filesystem browser, utilizing the libvirt, libvirt-glib, and libosinfo technologies. [7]
CVE-2011-1751 QEMU-KVM: PIIX4 emulation does not check if a device is hotpluggable before unplugging [7] CVE-2012-0217 The x86-64 kernel system-call functionality in Xen 4.1.2 and earlier; CVE-2014-0983 Oracle VirtualBox 3D acceleration multiple memory corruption; CVE-2015-3456 VENOM: buffer-overflow in QEMU's virtual floppy disk controller
GPU virtualization refers to technologies that allow the use of a GPU to accelerate graphics or GPGPU applications running on a virtual machine.GPU virtualization is used in various applications such as desktop virtualization, [1] cloud gaming [2] and computational science (e.g. hydrodynamics simulations).
KVM switches are called KVM sharing devices because two or more computers can share a single set of KVM peripherals. Computer sharing devices function in reverse compared to KVM switches; that is, a single PC can be shared by multiple monitors, keyboards, and mice.
It also integrates out-of-the-box-tools for configuring high availability between servers, software-defined storage, networking, and disaster recovery. [17] Proxmox VE supports live migration for guest machines between nodes in the scope of a single cluster, which allows smooth migration without interrupting their services. [18]
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