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A hypervisor, also known as a virtual machine monitor (VMM) or virtualizer, is a type of computer software, firmware or hardware that creates and runs virtual machines.A computer on which a hypervisor runs one or more virtual machines is called a host machine, and each virtual machine is called a guest machine.
Hyper-V is a native hypervisor developed by Microsoft; it can create virtual machines on x86-64 systems running Windows. [1] It is included in Pro and Enterprise editions of Windows NT (since Windows 8) as an optional feature to be manually enabled. [2]
VMware vSphere Hypervisor (ESXi 5.0) [43] 160 logical cores 2 TB 64 TB 512 32 1 TB 4 IDE; 60 SCSI 2 TB minus 512 bytes VMware vSphere Hypervisor (ESXi 5.5) (free) [44] 16 NUMA Nodes / 320 logical CPUs 4 TB Depending on filesystem 512 8 1 TB 4 IDE; 60 SCSI; 120 SATA 62 TB VMware vSphere Hypervisor (ESXi 5.5) [45] 16 NUMA Nodes / 320 logical CPUs ...
In computing, a client hypervisor is a hypervisor that is designed for use on client computers such as laptops, desktops or workstations, rather than on a server. It is a technique of host virtualization which enables the parallel execution of multiple operating systems (or virtual machines ) on shared hardware.
VMware ESXi (formerly ESX) is an enterprise-class, type-1 hypervisor developed by VMware, a subsidiary of Broadcom, for deploying and serving virtual computers.As a type-1 hypervisor, ESXi is not a software application that is installed on an operating system (OS); instead, it includes and integrates vital OS components, such as a kernel.
A hypervisor uses native execution to share and manage hardware, allowing for multiple environments that are isolated from one another yet exist on the same physical machine. Modern hypervisors use hardware-assisted virtualization , with virtualization-specific hardware features on the host CPUs providing assistance to hypervisors.
First release of first open-source x86 hypervisor, Xen. February 18: Microsoft acquires virtualization technologies (Virtual PC and unreleased product called "Virtual Server") from Connectix Corporation. February 18: Development begins on QEMU, a free and open-source hardware emulator. [5] Late 2003: EMC acquires VMware for $635 million.
Virtualization emulates the hardware environment of its host architecture, allowing multiple OSes to run unmodified and in isolation. At its origins, the software that controlled virtualization was called a "control program", but the terms "hypervisor" or "virtual machine monitor" became preferred over time. [1]