All >
Technology >
Operating System >
Microsoft Windows >
Microsoft Windows ServerAll >
Technology >
Parallel Computing >
Grid ComputingAll >
Technology >
Storage - In storage, virtualization is a means by which multiple physical storage devices are viewed as a single logical unit. Virtualization can be accomplished in-band (in the data path) or out-of-band. Out-of-band virtualization does not compete for host resources, and can virtualize storage resources irrespective of whether they are DAS, NAS or SAN.
Microsoft - Cite This Source - This Definition - The pooling of physical storage from multiple network storage devices into what appears to be a single storage device that is managed from a central console
HP - Cite This Source - This Definition - Browse Related Terms: command device, LUN (Logical Unit Number), LUN Masking, SRM (Storage Resource Management), Storage Consolidation, Storage Virtualization, target, UCB (Unit Control Block), Unified Block and File Architecture, zoning
All >
Technology >
Virtualization - A software technology allowing an operating system to run unmodified on an isolated virtual environment, called virtual machine, where a platform's physical characteristics and behaviours are reproduced.
virtualization.info - Cite This Source - This Definition - the decoupling of a resource or request for a service from the underlying physical delivery of that service such that the consumer needs no knowledge of the characteristics of the delivery system.
Versatile Systems - Cite This Source - This Definition - Virtualization is the creation of a virtual (rather than actual) version of something, such as an operating system, a server, a storage device or network resources.
Dell - Cite This Source - This Definition - Browse Related Terms: bare-metal, dom0, emulation, full virtualization, guest operating system, host OS (Operating System), hosted environment, Hosted Virtualization, operating system virtualization, partitioned, server virtualization, virtual machine
All >
Technology >
Virtualization - A general term for technology included in some 64-bit processors from AMD and Intel that can allow 64-bit operating systems to be run in virtual machines (where supported by VMware Workstation). More information is available in VMware knowledge base article 1901. See also AMD Virtualization and Virtualization Technology.
VMware - Cite This Source - This Definition - Browse Related Terms: AMD-V (AMD Virtualization), Hardware Virtualization Assist, Pacifica, Pacifica, AMD, SVM (Secure Virtual Machine), Vanderpool, virtualization hardware assist, VT (Virtualization Technology), VT, Intel
All >
Technology >
Virtualization - moving aspects of virtualization from a software hypervisor to CPU-level hardware to increase speed and efficiency. Intel is implementing as "VT", AMD as "Pacifica".
Versatile Systems - Cite This Source - This Definition - Browse Related Terms: AMD-V (AMD Virtualization), Hardware Virtualization Assist, Pacifica, Pacifica, AMD, SVM (Secure Virtual Machine), Vanderpool, Virtualization Assist, VT (Virtualization Technology), VT, Intel
All >
Technology >
Programming >
Java - An abstract specification for a computing device that can be implemented in different ways, in software or hardware. You compile to the instruction set of a virtual machine much like you'd compile to the instruction set of a microprocessor. The Java virtual machine consists of a bytecode instruction set, a set of registers, a stack, a garbage-collected heap, and an area for storing methods.
Sun Microsystems - Cite This Source - This Definition - See Java Virtual Machine (JVM).
David J. Barnes - Cite This Source - This Definition - Browse Related Terms: big-endian, cursor, CVM (Compact Virtual Machine), Java virtual machine<sup>1</sup>, JVM, KVM (Kilobyte Virtual Machine), little-endian, scheduler, virtual desktop
All >
Technology >
Virtualization - The environment in which a hosted operating system runs, providing the abstraction of a dedicated machine. A virtual machine may be identical to the underlying hardware (as in full virtualisation, or it may differ, as in paravirtualisation.
Xen.org - Cite This Source - This Definition - An empty, isolated, virtual environment, lying on top of a host OS, equipped with virtual hardware (processor, memory, disks, network interfaces, etc.) and managed by a virtualization product. It's where the guest OS is installed.
virtualization.info - Cite This Source - This Definition - A virtualized x86 PC environment in which a guest operating system and associated application software can run. Multiple virtual machines can operate on the same host system concurrently.
VMware - Cite This Source - This Definition - A representation of a real machine using software that provides an operating environment which can run or host a guest operating system.
VMware - Cite This Source - This Definition - a partitioned, isolated, and encapsulated abstraction of physical hardware to present a consistent, logical image of hardware resources (processor, memory, disk, network) to a hosted operating system to enable server virtualization.
Versatile Systems - Cite This Source - This Definition - A computer within a computer, implemented in software. A virtual machine emulates a complete hardware system, from processor to network card, in a self-contained, isolated software environment, enabling the simultaneous operation of otherwise incompatible operating systems. Each operating system runs in its own isolated software partition.
Microsoft - Cite This Source - This Definition - Browse Related Terms: bare-metal, dom0, emulation, full virtualization, guest operating system, host OS (Operating System), hosted environment, Hosted Virtualization, operating system virtualization, partitioned, server virtualization, virtualization
All >
Technology >
Programming >
Java - A computer will have a limited amount of real memory available to it. Programs often require more memory than the amount of real memory. Furthermore, in a multiprogramming system, different processes will be competing for the same limited supply of real memory. An operating system overcomes these conflicts by allocating an amount of virtual memory to each process, which might be larger than the total amount of real memory. This is possible by storing unused parts of a process's address space on disk, until such time as it is required. When required, it is swapped in to part of the real memory, whose previous contents are swapped out to disk.
David J. Barnes - Cite This Source - This Definition - Browse Related Terms: Boot, disk drive, distributed, File System, hardware, IP Address, PDCP (Parallel and Distributed Computing Practices), peripheral devices, swapping
All >
Technology >
Telecommunications - In computer systems, the memory as it appears to, i.e., as it is available to, the operating programs running in the central processing unit (CPU). Note: The virtual memory may be smaller, equal to, or larger than the real memory present in the system.
ATIS - Cite This Source - This Definition - Browse Related Terms: Central Processing Unit, central processor, Cinepak, communications processor unit (CPU), digital computer, Overclocking