NonStop S-Series Planning and Configuration Guide (G06.25+)

Glossary
HP NonStop S-Series Planning and Configuration Guide—523303-015
Glossary-103
SUB option
SUB option. In some Subsystem Control Facility (SCF) subsystems, the designation that
the object name given in a command stands not just for itself but for the names of all
objects at the next-lower level in the hierarchy. The given object name can stand both
for itself and for the subordinate objects, or it can stand only for the subordinate
objects, depending on the value of the SUB option.
subordinate objects. In Subsystem Control Facility (SCF), objects that are logically
subordinate to other objects. Some subsystems are structured hierarchically, with
objects of one type logically subordinate to (that is, controlled by) an object of another
type. For example, a number of subdevices can be configured on a single line. Some
SCF commands include a SUB option that refers to subordinate objects.
Subscriber Channel (SC). A type of head on a fiber-optic cable in which the pins connect
through a push-pull mating interface.
substate. Further information about the state of a device. The state and substate together
provide information about the current condition of a device or path to a device.
SUBSYS object type. The Subsystem Control Facility (SCF) object type for most
subsystems that use SCF as the user interface.
subsystem. (1) A secondary or subordinate system, usually capable of operating
independently of or asynchronously with a controlling system. (2) A program or set of
processes that manages a cohesive set of Subsystem Control Facility (SCF) objects.
Each subsystem has a manager through which applications can request services by
issuing commands defined by that subsystem. See also subsystem manager
.
Subsystem Control Facility (SCF). An interactive interface for configuring, controlling, and
collecting information from a subsystem and its objects. SCF enables you to configure
and reconfigure devices, processes, and some system variables while your HP
NonStop™ S-series server is online.
Subsystem Control Point (SCP). The message router for Subsystem Control Facility
(SCF). There can be several instances of this process. Using the Subsystem
Programmatic Interface (SPI), applications send each command for a subsystem to an
instance of the SCP process, which in turn sends the command to the manager
process of the target subsystem. SCP also processes a few commands itself. It
provides security features, version compatibility, support for tracing, and support for
applications implemented as process pairs.
subsystem manager. A process that performs configuration and management functions for
a subsystem.
Subsystem Programmatic Interface (SPI). A set of procedures and associated definition
files and a standard message protocol used to define common message-based
interfaces for communication between management applications and subsystems. It
includes procedures to build and decode specially formatted messages; definition files
in Transaction Application Language (TAL), COBOL85, and HP Tandem Advanced
Command Language (TACL) for inclusion in programs, macros, and routines using the