Operating Environment Software Owner's manual
Glossary
The following terms are commonly used to discuss Virtual Server Manager and its
integrated components:
Accelerated Virtual
Input/Output
See AVIO.
agent A program that regularly gathers information or performs some other service without the user's
immediate presence. Matrix Operating Environment for HP-UX relies on agents on managed
systems to provide in-depth hardware and software information.
agile addressing Supported on Integrity VM running HP-UX 11i v3, a storage device addressing model that
addresses a logical unit (referred to as LUN, this is the logical device that refers to the physical
storage device) by using the same device special file (DSF) regardless of the location of the LUN.
The addressing model uses a worldwide device identifier (WWID) to uniquely identify LUNs. The
WWID is a device attribute that is independent of the devices location in a SAN or in an
adapter/controller access path. With a multipath device, the WWID allows one persistent DSF
and one LUN hardware path to represent the device, regardless of the number of legacy hardware
paths. Therefore, an agile device address remains the same (is persistent) when changes are
made to the access path. Likewise, if additional paths are offered to a given LUN (by adding a
new SCSI controller or new SCSI target paths), the DSF is unaffected: no new DSFs need be
provided. This model enables Virtual Server Manager to display one DSF for each multipath
device instead of displaying a separate DSF for each path to the device (as done when using
the legacy addressing scheme).
See also legacy addressing.
APA Automatic Port Aggregation. A combination of LAN ports that can be accessed through a single
interface name. An APA creates link aggregates (often called trunks) that provide a logical
grouping of two or more physical ports into a single “fat pipe.” This port arrangement provides
more data bandwidth and higher reliability than would otherwise be available.
AVIO Accelerated Virtual Input/Output. An I/O protocol that improves virtual I/O performance for
network and storage devices used within the Integrity VM environment. The protocol also enables
support for a greater number of virtual I/O devices per guest. For each virtual partition containing
an AVIO device, the VSP OS and the guest OS must support AVIO.
backing device Backing store. The physical device (such as a network adapter, a disk, or a file) on the VSP that
is allocated to guests.
cluster Two or more systems configured together to host workloads. Users are unaware that more than
one system is hosting the workload.
core The actual data-processing engine within a processor. A single processor might have multiple
cores, and a core might support multiple execution threads. A virtual processor core in a virtual
partition is also called a CPU.
See also processor.
CPU Virtual CPU. A single-core virtual processor in a virtual partition.
See also core, processor.
dedicated vswitch A vswitch that is dedicated to use by a certain virtual partition. This type of vswitch cannot be
shared by multiple virtual partitions running at the same time.
EFI Extensible Firmware Interface. The system firmware user interface that allows boot-related
configuration changes and operations on Itanium-based systems. For example, EFI provides ways
to specify boot options and list boot devices.
entitlement The amount of a system resource (for example, processor resources) that is guaranteed to a virtual
partition. The actual allocation of resources to the virtual partition can be greater or less than its
entitlement, depending on the virtual partition's demand for processor resources and the overall
system processor load.
entitlement cap The maximum amount of computing power allotted to a virtual partition for each CPU.
guest The virtual partition running the guest OS and guest applications.
guest OS Guest operating system.
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