NonStop System Glossary

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. Examples of ServerNet clusters include 6770 ServerNet
clusters, 6780 ServerNet clusters, and the BladeCluster Solution.
2. A term used to describe a system in an earlier technology called 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.
NOTE: FOX clusters are not supported for HP Integrity NonStop NS-series and HP Integrity
NonStop BladeSystems.
CLuster I/O Module (CLIM)
A rack-mounted device that provides the physical interfaces to I/O devices and networks and
connects to the NonStop host system by means of two plug-in cards (PICs) that interface to the
ServerNet fabric of the NonStop host system.
Cluster I/O Protocols (CIP)
A subsystem on an Integrity NonStop system that provides a configuration and management
interface for storage and networking.
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 a 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
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.
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