NonStop System Glossary

tetrahedral topology
A topology of NonStop servers in which the ServerNet connections between the processor enclosures
form a tetrahedron. See also tetrahedron and topology.
tetrahedron
A geometric solid with four vertices. The edges of the tetrahedron represent connections between
the vertices in which each vertex connects to all other vertices. For ServerNet, a tetrahedron is four
processors interconnected by ServerNet links so as to form a conceptual tetrahedron. Each processor
therefore has a direct connection to the other three processors. See tetrahedral topology.
text string
A variable-length sequence of ASCII characters, defined in the CONFTEXT file, that an identifier
represents. When Distributed Systems Management/Software Configuration Manager (DSM/SCM)
encounters an identifier, it substitutes the associated text string for the identifier.
TF
See time factor (TF).
TFDS
See HP Tandem Failure Data System (TFDS).
TFTP
See Trivial File Transfer Protocol (TFTP).
THD
See total harmonic distortion (THD).
three point fall of potential measurement method
The measurement of a grounding electrode (such as a ground rod) where ground resistance is
measured with respect to two other points. The ratio of the measurements determines the resistance
of the grounding electrode.
TIM
See HP NonStop Technical Library (NTL). Effective with the H06.11 and the G06.24 RVUs, NTL
is replaced by docs.hp.com.
time factor (TF)
A number assigned to a line, path, or route to indicate its efficiency in transporting data. The lower
the time factor, the more efficient the line, path, or route. See also super time factors (STFs).
TLB
See translation lookaside buffer (TLB).
TMF
See HP NonStop Transaction Management Facility (TMF).
TMR
See triplex.
T 191