Introduction to NonStop Operations Management

Glossary
Introduction to NonStop Operations Management–125507
Glossary-5
environmental outage class.
environmental outage class. An outage class that includes failures in power, cooling,
network connections, natural disasters (earthquake, flood), terrorism, and accidents. See
also outage class.
event. A change in some condition in the system or network, whether minor or serious.
Events might be operational errors, notifications of limits exceeded, requests for action,
and so on.
Event Management Service (EMS). The processes, procedures, and utilities used to report
and log events; to forward, print, and distribute event messages to applications; and to
filter, retrieve, and obtain information from event messages.
Event Management Service Analyzer (EMSA). A conversational interface that is used to
select and analyze events from EMS log files, such as subsystem ID, event number, text,
and start and stop time.
event message. The message generated by a subsystem when a subsystem detects an event
that might affect its operation. These messages are generally formatted with tokens.
Expand. Tandem’s NonStop network that extends the concept of fault-tolerant operation to
networks of geographically distributed NonStop systems. If the network is properly
designed, communication paths are constantly available, even in the event of a single
line or component failure. For G-series systems, the Network Control Process (NCP)
and Expand line handler processes are defined and started with SCF from the WAN
subsystem.
fault tolerance. Fault-tolerant systems are able to tolerate physical and design-related
outages for all hardware components, including processors. Some vendors refer to fault
tolerance as “no single point of failure.”
File Utility Program (FUP). A utility program that allows you to perform a variety of
operations on disk files.
Flow Map. A Tandem product that translates the data collected by the Tandem Performance
Data Collector (TPDC) product into flow charts that can be used to analyze, document,
and manage applications.
FUP. See File Utility Program (FUP).
GPA. See Guardian Performance Analyzer (GPA).
Guardian Performance Analyzer (GPA). A Tandem product that gathers performance data
from Measure and then analyzes the collected data. See also Measure.
group manager (n, 255). A user ID that allows a user to control a group of user IDs.
high-security facility. A facility that has a perimeter security system, and totally redundant
hardware, environmental systems, and communications equipment.
HLSCOM. The command interface to SNAX/HLS.