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Virtualization - Tools like VMWare HA can, in case of a server failure, re-start virtual machines, automatically on another server. The tools also monitor the capacity of a server and choose an optimal server for the VM to run. In case of failure of the underlying physical resource, the machine is restarted, not dynamically moved, which means that there will be service downtime. This can be prevented by clustering firewalls even in virtualized network.
Stonesoft - Cite This Source - This Definition - the requirement that a business service be continuously operational for a desirably long length of time.
Versatile Systems - Cite This Source - This Definition - Browse Related Terms: business continuity, capacity planning, DR (Disaster Recovery), five nines, policy-based automation, Provisioning, SLA (Service Level Agreement), TCO (Total Cost of Ownership), Virtual Machine Management Service
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Virtualization - This technology was the starting point of the virtualization movement. Originally, the x86-architecture did not support virtualization. Intel and ADM have refined the x86 architecture and it now supports virtualization from the hardware side. For this purpose, they implemented, among others, extensions on the processors. If the CPU runs in normal mode, the instructions are executed as usual. In the virtual mode, special CPU routines are executed, ensuring a reliable execution of virtual machines.
Stonesoft - Cite This Source - This Definition - Browse Related Terms: industry standard architecture, Intel architecture, Itanium, NetBSD/Xen, Virtualization Hardware Support, x86 architecture
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Virtualization - See Virtualization Assist.
VMware - Cite This Source - This Definition - Browse Related Terms: AMD-V (AMD Virtualization), Pacifica, Pacifica, AMD, SVM (Secure Virtual Machine), Vanderpool, Virtualization Assist, virtualization hardware assist, VT (Virtualization Technology), VT, Intel
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Virtualization - A virtual environment where the virtualization product is installed on top of a host OS, instead of being installed on physical hardware. The opposite of bare metal environment.
virtualization.info - Cite This Source - This Definition - installing virtualization software on top of an existing standard operating system to provide services for one or more virtual machines. The host operating system provides the virtual machines the services to interface with the underlying hardware. Compare to bare metal environment.
Versatile Systems - Cite This Source - This Definition - Browse Related Terms: bare-metal, dom0, emulation, full virtualization, guest operating system, host OS (Operating System), Hosted Virtualization, operating system virtualization, partitioned, server virtualization, virtual machine, virtualization
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Virtualization - A virtualization approach where partitioning and virtualization services run on top of a standard operating system (the host). In this approach, the virtualization software relies on the host operating system to provide the services to talk directly to the underlying hardware.
VMware - Cite This Source - This Definition - Browse Related Terms: bare-metal, dom0, emulation, full virtualization, guest operating system, host OS (Operating System), hosted environment, operating system virtualization, partitioned, server virtualization, virtual machine, virtualization
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Virtualization - The operating system hosting one or more virtual machines (or partitions) and sharing physical resources with them. It's where the virtualization product or the partitioning product is installed.
virtualization.info - Cite This Source - This Definition - The operating system running directly on the host computer. VMware Workstation runs within the host operating system. See also Guest Operating System.
VMware - Cite This Source - This Definition - the operating system first installed on a computer which can run virtualization software to host one or more virtual machines. Compare to guest operating system.
Versatile Systems - Cite This Source - This Definition - Browse Related Terms: bare-metal, dom0, emulation, full virtualization, guest operating system, hosted environment, Hosted Virtualization, operating system virtualization, partitioned, server virtualization, virtual machine, virtualization
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Virtualization - An alternative term for VMM, used because it means 'beyond supervisor', since it is responsible for managing multiple 'supervisor' kernels.
Xen.org - Cite This Source - This Definition - The virtualization software layer managing hardware requests from a guest OS, simulating answers from a real hardware. Used as VMM (Virtual Machine Monitor) synonymous.
virtualization.info - Cite This Source - This Definition - A thin layer of software that generally provides virtual partitioning capabilities which runs directly on hardware, but underneath higher-level virtualization services. Sometimes referred to as a "bare metal" approach.
VMware - Cite This Source - This Definition - A hypervisor, also called virtual machine monitor, is a program that allows running several instances of one or of several different operating systems. The hypervisor is processor-specific. It controls the CPU as well as all hardware resources and provides every operating system instance with the required resources. Depending on the technology, the hypervisor emulates the hardware for every instance or translates the requirements to the CPU.
Stonesoft - Cite This Source - This Definition - the first layer of software installed on a computer system in a bare metal environment, but below other virtualization services such as a virtual machine monitor, that allows multiple, possibly heterogeneous, operating systems to share a single hardware platform. Compare to hosted virtualization.
Versatile Systems - Cite This Source - This Definition - The hypervisor is the software layer that abstracts the hardware from the operating system permitting multiple operating systems to run on the same hardware. The hypervisor runs on the host system allowing virtual machines to run on the host's hardware as well.
Red Hat - Cite This Source - This Definition - A hypervisor, sometimes referred to as a virtualization manager, is a program that allows multiple operating systems which can include different operating systems or multiple instances of the same operating system, to share a single hardware processor.
Dell - Cite This Source - This Definition - Browse Related Terms: BT (Binary Translation), fully virtualized, hardware-independence, hardware virtual machine, isolated, para-virtualization, physical computer, VMM (Virtual Machine Monitor)