NonStop S-Series Hardware Installation and FastPath Guide (G06.26+)

Glossary
HP NonStop S-Series Hardware Installation and FastPath Guide—529876-001
Glossary-14
client
client. A software process, hardware device, or combination of the two that requests
services from a server. Often, the client is a process residing on a programmable
workstation and is the part of an application that provides the user interface. The
workstation client might also perform other portions of the application logic.
client application. An application that requests a service from a server application.
Execution of remote procedure calls is an example of a client application.
client (of a loadable library). A loadfile that uses functions or data from a library.
CLIP. See communications line interface processor (CLIP).
cluster. (1) A collection of servers, or nodes, that can function either independently or
collectively as a processing unit. See also ServerNet cluster. (2) A term used to
describe a system in a Fiber Optic Extension (FOX) ring. More specifically, a FOX
cluster is a collection of processors and I/O devices functioning as a logical group. In
FOX nomenclature, the term is synonymous with system or node.
cluster number. A number that uniquely identifies a node in a Fiber Optic Extension (FOX)
ring. This number is in the range 1 through 14. See also node number.
cluster switch. See HP NonStop™ Cluster Switch (model 6770) and HP NonStop™
ServerNet Switch (model 6780).
cluster switch enclosure. An enclosure provided by HP for housing the subcomponents of
an HP NonStop™ Cluster Switch. The subcomponents include the ServerNet II Switch,
the AC transfer switch, and the uninterruptible power supply (UPS). A cluster switch
enclosure resembles, but is half the height of, a standard HP NonStop S-series system
enclosure.
cluster switch group. Within an external ServerNet fabric, all the cluster switches that
belong to the same cluster switch zone. A cluster switch group can consist of up to four
6780 switches, each representing one cluster switch layer. All of the cluster switches
that form a cluster switch group typically are installed in the same cluster switch rack
.
cluster switch layer. The topological cluster switch position within a cluster switch group
.
Each cluster switch group can contain up to four layers, numbered 1 to 4 from bottom
to top. A cluster switch layer consists of a pair of cluster switches (X and Y) and
provides connections for up to eight ServerNet nodes. Layers within a group are
interconnected by intragroup cables. When all four layers are present, the intragroup
cables are configured as a vertical tetrahedron. See also cluster switch layer number.
cluster switch layer number. A number in the range 1 through 4 that identifies the position
of a cluster switch within a cluster switch group. See also cluster switch group.
cluster switch logic board. A circuit board that provides switching logic for the HP
NonStop™ ServerNet Switch (model 6780). The logic board (LB) has a front panel for
operator and maintenance functions and is a Class-3 CRU.