HP Integrity NonStop J-Series - Manual (Page 318)

tetrahedral
topology A topology of NonStop S-series servers in which the ServerNet connections between the processor
enclosures form a tetrahedron.
tetrahedron A solid bounded by four triangular faces. In ServerNet context, a tetrahedron is four processors
interconnected by ServerNet links so as to form a conceptual tetrahedron. Each processor therefore
has a direct connection to the other three processors.
See also
tetrahedral topology .
topology The physical layout of components that define a local area network ( LAN ). a system area network
( SAN ), or a wide are network ( WAN ).
See also layered topology , star topology .
topology branch A processor enclosure and the I/O enclosures directly connected to it.
track ID A unique number assigned to customer-replaceable unit (CRU) and field-replaceable units (FRUs) .
The track ID is located on a label on the outside of the component, usually following the assembly
number of the component.
Transmission
Control Protocol
(TCP) A connection-oriented protocol that provides for the reliable exchange of data between a sending
and a receiving system, no matter how many intermediate
nodes the data traverses. TCP, in
conjunction with the internet protocol (IP) , is used to facilitate OSM communications over an
Ethernet local area network ( LAN ).
tree pane Located on the left side of the Management window , a pane that displays resources in a hierarchy.
The tree pane contains a drop down menu with two options: System view and ServerNet Cluster
view. The System view bears the name of the local system and displays resources within the
system. The ServerNet Cluster view displays resources in a supported Expand network, such as
a ServerNet cluster.
See also
details pane , view pane .
tri-star topology A network topology that uses up to three HP NonStop Cluster Switches for each external fabric.
External routing is implemented between the three star groups of a ServerNet cluster. (A star
group consists of the eight nodes attached to one set of cluster switches.) The star groups are
joined by two-lane links. The tri-star topology supports up to 24 nodes.
See also
split-star topology , star topology , layered topology .
triplex Having three active processor elements per logical processor. Also called triple-modular
redundancy (TMR).
two-lane link The two single-mode fiber-optic (SMF) ServerNet cables that connect the HP NonStop Cluster
Switches on the same external fabric (for example, X1, X2, and X3) in a
tri-star topology .
U
unattended site
(dark site) A location where no operator is working on site and the only access to the LAN is from a
centralized monitoring station through a modem connected to a routing workstation . Dark site is
a synonym for unattended site.
uncorrectable
memory error
(UCME) An error caused by incorrect data at a particular memory location. The cause of the incorrect
data is one that is not automatically corrected by the system, and memory replacement might be
required. The occurrence of a UCME indicates that a processor is having memory errors. The
processor halts with a hardware error freeze and generates an
alarm as well as an incident
report .
uninterruptible
power supply
(UPS) The equipment used to provide an uninterruptible source of power to connected equipment if a
main power outage occurs. The basic components of any UPS system are a rectifier/charger that
converts alternating-current (AC) power to direct-current (DC) power, batteries that store the DC
power, and an inverter that converts the DC power back into AC power for distribution to the
load..
V
value-added
diagnostics A collection of troubleshooting and support features that are included with a valid service contract.
These features include:
• The generation of incident reports and EMS event messages related to incident reports
• The ability to configure the dial-out phone number
318 Glossary