NonStop S-Series Server Description Manual (G06.24+)

Glossary

HP NonStop S-Series Server Description Manual—520331-003

Glossary-107

tetrahedral topology

tetrahedral topology. A topology of HP NonStop™ S-series servers in which the ServerNet

connections between the processor enclosures form a tetrahedron. See also

tetrahedron and topology.

tetrahedron. A solid bounded by four triangular faces. In ServerNet context, 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 Total Information Manager (TIM).

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.