Pathway Products Glossary

Glossary
Compaq NonStop™ Pathway Products Glossary—426762-001
Glossary-10
Event Management Service (EMS)
Event Management Service (EMS). A part of DSM used to provide event collection, event
logging, and event distribution facilities. It provides for different descriptions of events
for people and for programs, lets an operator or application select specific event-
message data, and allows for flexible distribution of event messages within a system or
network. EMS has an SPI-based programmatic interface for reporting and retrieving
events. See also event message
.
event message. A special kind of SPI message that describes an event occurring in the
system or network. Event messages are collected, logged, and distributed by EMS. See
also Event Management Service (EMS)
.
expandability. See scalability
.
Expand networking software. Compaq software that can connect up to 255 NonStop™
Himalaya systems into a single network.
Extended General Device Support (GDSX). A Compaq product for NonStop™ Himalaya
systems that facilitates communication between general I/O devices and a PATHMON
environment by acting as a front-end or a back-end process.
extensible structured token. In the Subsystem Programmatic Interface (SPI), a token with a
value that can be extended by appending new fields in later releases. The token is
accessed through reference to a token map containing field-version and null-value
information, allowing SPI to provide compatibility between different versions of the
structure. See also simple token
and token (definition 2).
external PATHMON process. See external process
.
external process. (1) In a Pathway environment without Pathway/XM, a process in a
different PATHMON environment from the process with which it is communicating.
For example, suppose a TCP managed by PATHMON process $PMB requests a link to
a server process in a server class that is managed by PATHMON process $PMA. Both
the TCP and PATHMON process $PMB are external processes with respect to
PATHMON process $PMA and the server class managed by $PMA. (2) In a
Pathway/XM environment, an external PATHMON process (with respect to a TCP) is
any PATHMON process other than the one that controls the TCP. An external
PATHMON process can be in the same Pathway/XM environment as the TCP or in a
different Pathway/XM environment. An external TCP is a TCP in a different
Pathway/XM environment from the server processes with which it is communicating.
In the Pathway/XM environment, external TCPs are not recommended, except in special
cases where they are needed—for example, to allow use of Pathway/XM with SCREEN
COBOL programs that include hard-coded TCP names.
external server. See external process
.
external TCP. See external process
.