Distributed Name Service (DNS) Management Operations Manual

Glossary
Glossary–10 31258 Tandem Computers Incorporated
SCP. See Subsystem Control Point.
session. The period during which two entities can exchange data. In the context of a
management application, the period during which an application can issue commands
to a subsystem. In the context of a command interpreter, the period during which a
user can issue commands to the command interpreter.
simple object. An object that is managed by a single subsystem.
SNA. See Systems Network Architecture.
SNAX Extended Facility (SNAX/XF). The Tandem communications services software that
enables SNA hosts and devices to communicate with Tandem systems and share
applications with Tandem systems. See Systems Network Architecture (SNA).
SNAX/XF. See SNAX Extended Facility.
SPI. See Subsystem Programmatic Interface.
SPI message. A message specially formatted by the SPI procedures for communication
between a management application and a subsystem. An SPI message consists of a
collection of tokens. There are two types of SPI messages, distinguished by two
different SPI message header types: 1) command and response messages and 2) event
messages. See header type.
SPI procedures. The set of Guardian 90 procedures used to build and decode buffers for
use in system and network management and in certain other applications. These
procedures are SSINIT, SSNULL, SSPUT, SSPUTTKN, SSGET, SSGETTKN, SSMOVE,
and SSMOVETKN.
SS number. See subsystem number.
SSID. See subsystem ID.
starting state. The state in which a piece of software or a device is being prepared for
operation. In the case of DNS, the operational state in which named DNS processes
are being created.
startup message. A specific message sent by the creator to a newly created process.
startup sequence. The steps required to initiate a process.
stopped state. The state in which a process or a device is absent or unavailable. In the
case of DNS, the operational state in which none of the named DNS processes are
currently active.
stopping state. The state in which a process or device is being shut down in an orderly
way. In the case of DNS, the state in which an orderly shutdown of DNS is in
progress.
subsystem. A program or set of processes that manages a cohesive set of objects. Each
subsystem has a process (in some cases, this process is the entire subsystem) through
which applications can request services by issuing commands defined by that
subsystem. See management process.