Glossary – HP Matrix Operating Environment Software User Manual
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Glossary
The following terms are commonly used to discuss VM 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
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 device’s 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 VM 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
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
environment. The protocol also enables
support for a greater number of virtual I/O devices per guest. For each virtual machine containing
an AVIO device, the VM Host 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
that is allocated to
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
machine is also called a virtual CPU or vCPU.
See also processor.
dedicated vswitch
A
that is dedicated to use by a certain
. This type of vswitch cannot be
shared by multiple virtual machines 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
. The actual allocation of resources to the virtual machine can be greater or less than its
entitlement, depending on the virtual machine's demand for processor resources and the overall
system processor load.
entitlement cap
The maximum amount of computing power allotted to a
for each
guest
The virtual machine running the
and guest applications.
guest OS
Guest operating system.
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