Pathway Products Glossary

Glossary
Compaq NonStop™ Pathway Products Glossary—426762-001
Glossary-30
socket
socket. A communications endpoint in the NonStop™ Kernel implementation of the
Berkeley Software Distribution’s Sockets API, used for communications between two
processes using the TCP/IP protocol.
special register. A data item defined by the SCREEN COBOL compiler, rather than
explicitly in the program. Each special register has a particular purpose and should be
used only as defined. The SCREEN COBOL language defines a different set of special
registers from those defined by the standard COBOL language.
SPI. See Subsystem Programmatic Interface (SPI)
.
SQL/MP. The Compaq relational database management system that runs on NonStop™
Himalaya systems and promotes efficient online access to large distributed databases.
See also Structured Query Language (SQL)
and Enscribe database record manager.
state information. Information in a SuperCTL file that is added at run time (after the
Pathway/XM environment is started) and that represents the current state of the
Pathway/XM environment, including the names and locations of the currently running
PATHMON processes. See also cool start
and SuperCTL file.
static server. (1) In a Pathway environment without Pathway/XM, a server process that the
PATHMON process creates when a PATHCOM or SPI START SERVER command is
issued. The PATHMON process starts the number of static servers defined by the
NUMSTATIC attribute for the server class. See also dynamic server
. (2) In a
Pathway/XM environment, a direct or replicated server process that a PATHMON
process creates when a PXMCOM START SERVER command is issued. Each
PATHMON process associated with the server class starts the number of static servers
defined by the NUMSTATIC attribute for the server class. See also dynamic server.
Structured Query Language (SQL). A relational database language used to define,
manipulate, and control databases.
subsystem. In the context of the Subsystem Programmatic Interface (SPI) and the Event
Management Service (EMS), a process or collection of processes that gives users access
to a set of related resources or services. A subsystem typically controls a cohesive set of
objects.
The Pathway subsystem includes PATHMON processes, TCPs, and all other
components of the PATHMON environment.
subsystem ID. In management applications, a data structure that uniquely identifies a
subsystem. The subsystem ID is specified in SPI commands to identify the target
subsystem, and in EMS event messages to identify the source of the event message. The
Pathway subsystem ID applies to all components of the PATHMON environment,
including PATHMON processes and TCPs.
Subsystem Programmatic Interface (SPI). A set of Guardian procedures, message formats,
and definition files that allows management applications to communicate directly with
subsystem processes, such as the PATHMON process, for configuration and control of
objects and for event management.