Availability Guide for Problem Management

Glossary
Availability Guide for Problem Management–125509
Glossary-10
TFDS
screen programs and their I/O devices or processes and, with the help of PATHMON,
establishes links between screen programs and Pathway server processes.
TFDS. See Tandem Failure Data System (TFDS).
TMDS. See Tandem Maintenance and Diagnostic System.
TPDC. See Tandem Performance Data Collector (TPDC).
transaction. An explicitly delimited operation or set of related operations that alters the
content of a database.
unplanned outage. Time during which the system is not capable of doing useful work
because of an unplanned interruption. Unplanned interruptions can include failures
caused by faulty hardware, operator error, or disaster. Contrast with planned outage.
See also outage, outage minutes, outage log, and availability.
ViewSys. An interactive utility that monitors system resources while the system is running.