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May 18th, 2007 19:00
Virtualization Glossary
Here are some of the terms and definitions that you may find while researching Virtualization.
If there are any additional ones that you would like to see in our Virtualization Glossary please let me know and I will add them as appropriate.
Clone: Cluster: Cluster Complete Resource: Data Center: Headless: Hypervisor: Partition: Physical Disk: Raw Device Mapping (RDM): SAN: Server sprawl: Server Consolidation: Snapshot: Virtualizaton: Server Virtualization: Network Virtualization: Storage Virtualization: Virtual Disk: Virtual Infrastructure Client (VI Client): Virtual Machine Monitor (VMM): VMware: XEN:
Clone:
A duplicate of a Virtual Machine.
Cluster:
Server Group in a Virtual Entironment
Cluster Complete Resource:
A managed object that represents wither a single host or a cluster of hosts available for backing virtual machines.
Data Center:
A data center (sometimes spelled datacenter) is a centralized repository, either physical or virtual for the storage, management, and dissemination of data and information organized around a particular body of knowledge or pertaining to a particular business
Headless:
Describes a program or application that runs in the background without any interface connected to it. A running virtual machine that has no consoles connected to it is running headless.
Hypervisor:
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.
Partition:
A partition is a logical division of a hard disk created so that you can have different operating systems on the same hard disk or to create the appearance of having separate hard drives for file management, multiple users, or other purposes. A partition is created when you format the hard disk.
Physical Disk:
A hard disk drive in a virtual machine that is mapped to a physical drive or partition on the host machine. A virtual machines disk can be stored as a file on the host file system or on a local hard disk. See also Virtual Disk.
Raw Device Mapping (RDM):
A mechanism that enables a virtual machine to have direct access to a LUN on the physical storage subsystem (Fibre Channel or iSCSI only).
SAN:
A storage area network (SAN) is a high-speed special-purpose network (or subnetwork) that interconnects different kinds of data storage devices with associated data servers on behalf of a larger network of users. Typically, a storage area network is part of the overall network of computing resources for an enterprise.
Server sprawl
Server sprawl is a situation in which multiple, under-utilized servers take up more space and consume more resources than can be justified by their workload.
Server Consolidation
Server consolidation is an approach to the efficient usage of computer server resources in order to reduce the total number of servers or server locations that an organization requires.
Snapshot:
A reproduction of the virtual machine just as it was when you took the snapshot, including the state of the data on all the virtual machine's disks and whether the virtual machine was powered on, powered off or suspended. You can take spanshots of a virtual machine at any time and go to any snapshot at any time. You can take a snapshot when a virtual machine is powered on, powered off, or suspended. You can configure a virtual machine to exclude specified disks from snapshots.
Virtualizaton:
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.
Server Virtualization:
Server virtualization is the masking of server resources, including the number and identity of individual physical servers, processors, and operating systems, from server users. The server administrator uses a software application to divide one physical server into multiple isolated virtual environments. The virtual environments are sometimes Called virtual private servers, but they are also known as partitions, guests, instances, containers or emulations.
Network Virtualization:
Network virtualization is a method of combining the available resources in a network by splitting up the available bandwidth into channels, each of which is independent from the others, and each of which can be assigned (or reassigned) to a particular server or device in real time. Each channel is independently secured. Every subscriber has shared access to all the resources on the network from a single computer.
Storage Virtualization:
Virtualization is 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. Storage virtualization is commonly used in a storage area network (SAN). The management of storage devices can be tedious and time-consuming. Storage virtualization helps the storage administrator perform the tasks of backup, archiving, and recovery more easily, and in less time, by disguising the actual complexity of the SAN.
Virtual Disk
A file or set of files that appears as a physical disk drive to a guest operating system. These files can be on the host machine or on the remote file system. See also physical disk.
Virtual Infrastructure Client (VI Client):
A user interface that runs locally in a Windows machine and provides access to the virtual machine's display. The Virtual Infrastructure Client runs on a networked machine. This can be on the same machine as the VirtualCenter Server or another networked machine. The Virtual Infrastructure Client requires a monitor for access to the virtual machines display.
Virtual Machine Monitor (VMM):
Software that is responsible for virtualizing the CPUs
VMware:
VMware is a company that provides virtualization software for x86 compatible computers. VMware Inc. is a subsidiary of EMC Corporation and has its headquarters in Palo Alto, California. The term "VMware" is often used in reference to specific VMware Inc. products such as VMware Workstation, VMware Virtual Desktop Infrastructure, VMware Player and VMware Server.
XEN:
Xen is an open source implementation of virtualization that is freely available at www.xensource.com. It has been adopted by a number of different Linux distributions, including Novell's SuSE Linux Enterprise Server.
If there are any additional ones that you would like to see in our Virtualization Glossary please let me know and I will add them as appropriate.
Clone: Cluster: Cluster Complete Resource: Data Center: Headless: Hypervisor: Partition: Physical Disk: Raw Device Mapping (RDM): SAN: Server sprawl: Server Consolidation: Snapshot: Virtualizaton: Server Virtualization: Network Virtualization: Storage Virtualization: Virtual Disk: Virtual Infrastructure Client (VI Client): Virtual Machine Monitor (VMM): VMware: XEN:
Clone:
A duplicate of a Virtual Machine.
Cluster:
Server Group in a Virtual Entironment
Cluster Complete Resource:
A managed object that represents wither a single host or a cluster of hosts available for backing virtual machines.
Data Center:
A data center (sometimes spelled datacenter) is a centralized repository, either physical or virtual for the storage, management, and dissemination of data and information organized around a particular body of knowledge or pertaining to a particular business
Headless:
Describes a program or application that runs in the background without any interface connected to it. A running virtual machine that has no consoles connected to it is running headless.
Hypervisor:
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.
Partition:
A partition is a logical division of a hard disk created so that you can have different operating systems on the same hard disk or to create the appearance of having separate hard drives for file management, multiple users, or other purposes. A partition is created when you format the hard disk.
Physical Disk:
A hard disk drive in a virtual machine that is mapped to a physical drive or partition on the host machine. A virtual machines disk can be stored as a file on the host file system or on a local hard disk. See also Virtual Disk.
Raw Device Mapping (RDM):
A mechanism that enables a virtual machine to have direct access to a LUN on the physical storage subsystem (Fibre Channel or iSCSI only).
SAN:
A storage area network (SAN) is a high-speed special-purpose network (or subnetwork) that interconnects different kinds of data storage devices with associated data servers on behalf of a larger network of users. Typically, a storage area network is part of the overall network of computing resources for an enterprise.
Server sprawl
Server sprawl is a situation in which multiple, under-utilized servers take up more space and consume more resources than can be justified by their workload.
Server Consolidation
Server consolidation is an approach to the efficient usage of computer server resources in order to reduce the total number of servers or server locations that an organization requires.
Snapshot:
A reproduction of the virtual machine just as it was when you took the snapshot, including the state of the data on all the virtual machine's disks and whether the virtual machine was powered on, powered off or suspended. You can take spanshots of a virtual machine at any time and go to any snapshot at any time. You can take a snapshot when a virtual machine is powered on, powered off, or suspended. You can configure a virtual machine to exclude specified disks from snapshots.
Virtualizaton:
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.
Server Virtualization:
Server virtualization is the masking of server resources, including the number and identity of individual physical servers, processors, and operating systems, from server users. The server administrator uses a software application to divide one physical server into multiple isolated virtual environments. The virtual environments are sometimes Called virtual private servers, but they are also known as partitions, guests, instances, containers or emulations.
Network Virtualization:
Network virtualization is a method of combining the available resources in a network by splitting up the available bandwidth into channels, each of which is independent from the others, and each of which can be assigned (or reassigned) to a particular server or device in real time. Each channel is independently secured. Every subscriber has shared access to all the resources on the network from a single computer.
Storage Virtualization:
Virtualization is 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. Storage virtualization is commonly used in a storage area network (SAN). The management of storage devices can be tedious and time-consuming. Storage virtualization helps the storage administrator perform the tasks of backup, archiving, and recovery more easily, and in less time, by disguising the actual complexity of the SAN.
Virtual Disk
A file or set of files that appears as a physical disk drive to a guest operating system. These files can be on the host machine or on the remote file system. See also physical disk.
Virtual Infrastructure Client (VI Client):
A user interface that runs locally in a Windows machine and provides access to the virtual machine's display. The Virtual Infrastructure Client runs on a networked machine. This can be on the same machine as the VirtualCenter Server or another networked machine. The Virtual Infrastructure Client requires a monitor for access to the virtual machines display.
Virtual Machine Monitor (VMM):
Software that is responsible for virtualizing the CPUs
VMware:
VMware is a company that provides virtualization software for x86 compatible computers. VMware Inc. is a subsidiary of EMC Corporation and has its headquarters in Palo Alto, California. The term "VMware" is often used in reference to specific VMware Inc. products such as VMware Workstation, VMware Virtual Desktop Infrastructure, VMware Player and VMware Server.
XEN:
Xen is an open source implementation of virtualization that is freely available at www.xensource.com. It has been adopted by a number of different Linux distributions, including Novell's SuSE Linux Enterprise Server.
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