Attached I/O

A device given to a virtual machine without being virtualized by the VMHost.

Shared I/O

A device on the VMHost that is virtualized and shared among different VMGuests.

VMGuest

A virtual machine with its own operating system, resources, and identity within a physical host.

VMHost

An HP Integrity Server that has virtual machines running within it. It hosts the IVM package.

VM-PM

A Veritas Cluster Server (VCS) supported configuration in which a cluster is formed among the VMGuests and physical machines.

PM-PM

A VCS supported configuration in which a cluster is formed among the VMHosts and is used to manage VMGuests.

VM-VM

A VCS supported configuration in which a cluster is formed among the VMGuests.

Backing store

A device on the VMHost, such as a network adapter, disk, or file that is allocated to the VMGuests.

Online VM guest migration

A technology to migrate a running VMGuest and its applications from one VMHost to another without service interruption.

VSwitch

A network switch emulated in software that enables and controls network connections between the VMGuests and physical networks.

Virtual Disk

An emulated SCSI disk whose virtual media comes from a VM Host disk LUN.

Virtual LvDisk

An emulated SCSI disk whose virtual media is provided by a raw VM Host VxVM volume.

Virtual FileDisk

An emulated SCSI disk whose virtual media comes from a VM Host file.

Accelerated Virtual I/O (AVIO)

This new technology from HP delivers a streamlined I/O path for both storage and networking resulting in significant performance improvements for I/O workloads in an IVM environment.

VCS supports both AVIO and VIO configurations for storage and networking devices in an IVM environment.