TCP/IPv6 Configuration and Management Manual (G06.24+)

Glossary
HP NonStop TCP/IPv6 Configuration and Management Manual—524523-008
Glossary-15
noncritical event
were local. The key advantage of NFS over conventional file transfer protocols is that
NFS hides the differences between local and remote files by placing them in the same
name space. NFS is used primarily on UNIX systems, but has been implemented for
many systems, including personal computers like an IBM PC and Apple Macintosh.
noncritical event. A DSM event not too crucial to system or network operations. Each
subsystem determines which of its events are noncritical by setting the value of the
emphasis token to FALSE. Compare critical event.
nonsensitive command. A DSM command that can be issued by any user or program
allowed access to the target subsystem—that is, a command on which the subsystem
imposes no further security restrictions. For HP data communications subsystems, the
nonsensitive commands are all those that cannot change the state or configuration of
objects (usually information commands). Compare sensitive command.
nowait mode. In Guardian file-system operations and in some APS operations, the mode in
which the called procedure initiates an I/O operation but does not wait for it to complete
before returning control to the caller. To make the called procedure wait for the
completion of the operation, the application calls a separate procedure. Compare wait
mode.
object. (1) In general HP use, one or more of the devices, lines, processes, and files in an
HP subsystem; any entity subject to independent reference or control by one or more
subsystems. (2) In DSM use, an entity subject to independent reference and control by
a subsystem: for example, the disk volume $DATA or the data communications line
$X2502. An object typically has a name and a type known to the controlling
subsystem.
object-name template. In DSM, a name that stands for more than one object. Such a name
includes one or more wild-card characters, such as * and ?. See also wild-card
character.
object type. In DSM, the category of objects to which a specific object belongs: for
example, a specific disk file might have the object type FILE, and a specific terminal
might have the object type SU (subdevice). A subsystem identifies a set of object types
by the objects it manages. The SCF interfaces to HP data communications
subsystems use standard keywords to identify the types. The corresponding
programmatic interfaces have object-type numbers (represented by symbolic names
such as ZCOM-OBJ-SU) appropriate for passing to the SPI SSINIT procedure.
open system. Any computer system that adheres to the OSI standards.
Open Systems Interconnection. A set of standards used for the interconnection of
heterogeneous computer systems, thus providing universal connectivity.
OSI. See Open Systems Interconnection.
OSI Reference Model. A communications architecture, adopted by the ISO in 1984, that
includes seven layers that define the functions involved in communications between