QIO Configuration and Management Manual

Glossary
QIO Configuration and Management Manual—424717-008
Glossary-12
shared memory segment
shared memory segment. The shared memory segment is allocated when QIO is started.
The shared memory segment contains the data structures used to send and receive
data for each LAN controller in the processor.
SLSA subsystem. See ServerNet LAN Systems Access (SLSA) subsystem.
state. In Subsystem Control Facility (SCF), one of the generally defined possible conditions
of an object with respect to the management of that object. Examples of states are
DEFINED, STARTED, and STOPPED.
storage pool. A set of physical disk volumes administered as a set of logical disk volumes.
A logical disk volume can span multiple physical disk volumes. When a logical disk
volume becomes full, more physical disk volumes can be added.
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™ 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.
SWAN concentrator. See ServerNet wide area network (SWAN) concentrator
.
SWAN 2 concentrator. See ServerNet wide area network (SWAN) 2 concentrator
.
system configuration database. The database file on the $SYSTEM.ZSYSCONF
subvolume that contains configuration information for all system objects that can be
configured by the Subsystem Control Facility (SCF). Configuration information for all
system objects that can be configured during system generation is contained on the
$SYSTEM.SYSnn subvolume.
TACL. See HP Tandem Advanced Command Language (TACL)
.