Ethernet Adapter Installation and Support Guide

Glossary
Ethernet Adapter Installation and Support Guide—425684-003
Glossary-106
Transaction Management Facility (TMF) subsystem
Transaction Management Facility (TMF) subsystem. The major component of the HP
NonStop™ Transaction Manager product, which protects databases in online
transaction processing (OLTP) environments. To furnish this service, the TMF
subsystem manages database transactions, keeps track of database activity through
audit trails, and provides database recovery methods. Formerly called Transaction
Monitoring Facility (TMF). See also HP NonStop™ Transaction Manager.
transformer. Equipment used to step up or step down alternating-current (AC) voltage to
meet the specific requirements of the load. A transformer also provides isolation and
noise-attenuation properties.
transient. A short-duration, high-amplitude impulse that is imposed upon the normal voltage
or current.
translation lookaside buffer (TLB). A special-purpose cache, part of the RISC processor
chip, that is used in quickly translating virtual addresses to physical addresses. This
rapid translation is accomplished by remembering and reusing the translations of
recently referenced pages.
Transmission Control Protocol (TCP). A connection-oriented protocol that provides for the
reliable exchange of data between a sending and a receiving system. TCP implements
functions corresponding to the Open Systems Interconnection (OSI) reference model
Layer 4, the transport layer.
Transmission Control Protocol/Internet Protocol (TCP/IP). A set of layered
communication protocols for connecting workstations and larger systems in both local
area networks (LANs) and wide area networks (WANs). See also HP NonStop™
TCP/IP and Parallel Library TCP/IP.
tri-star topology. A network topology that uses up to three HP NonStop™ Cluster Switches
for each external fabric. External routing is implemented between the three star groups
of a ServerNet cluster. (A star group consists of the eight nodes attached to one set of
cluster switches.) The star groups are joined by two-lane links. Introduced with the
G06.14 release version update (RVU) of the HP NonStop ServerNet Cluster product,
the tri-star topology supports up to 24 nodes. See also split-star topology.
Trivial File Transfer Protocol (TFTP). A protocol defined by Request for Comments (RFC)
1350. TFTP is used as a data link control (DLC) and diagnostic task.
TRSA. See Token-Ring ServerNet adapter (TRSA).
TSM. See Compaq TSM.
TSM client software. See Compaq TSM client software.
TSM EMS Event Viewer Application. See Compaq TSM EMS Event Viewer Application.
TSM Low-Level Link Application. See Compaq TSM Low-Level Link Application.