NonStop S-Series Planning and Configuration Guide (G06.25+)

Glossary
HP NonStop S-Series Planning and Configuration Guide—523303-015
Glossary-112
TNS/R library
system-level architecture. Systems with these processors include most of the HP
NonStop™ servers. Contrast with TNS
.
TNS/R library. A TNS/R native-mode library. For a PIC-compiled application, TNS/R
libraries can be dynamic-link libraries (DLLs) or hybridized native shared runtime
libraries (SRLs). For an application that is not PIC compiled, TNS/R libraries can only
be native SRLs.
TNS/R native mode. The operational environment in which native-compiled RISC
instructions execute. See also accelerated mode
and TNS mode.
TNS/R native process. A process initiated by executing code that has been compiled
directly to RISC instructions rather than to TNS instructions. Such a process uses
RISC register and stack conventions and executes in TNS/R native mode
.
TNS/R native shared run-time library (TNS/R native SRL). A shared run-time library
(SRL) available to TNS/R native processes in both the Guardian and Open System
Services (OSS) environments. TNS/R native SRLs can be either public or private. A
TNS/R native process can have multiple public SRLs but only one private SRL.
Token-Ring ServerNet adapter (TRSA). A ServerNet adapter that provides a single line
from an HP NonStop™ S-series server to a token-ring network, allowing the server to
act as a station on the ring. The 3862 TRSA can be configured to support network
speeds of 4 megabits/second (Mbps) or 16 Mbps, and the media can be either
shielded twisted pair (STP)
or unshielded twisted pair (UTP).
topology. The physical layout of components that define a local area network (LAN), wide
area network (WAN), or ServerNet fabric. See also star topology
and tetrahedral
topology.
topology branch. A processor enclosure and the I/O enclosures attached to it.
total harmonic distortion (THD). The ratio, expressed in percent, of the root mean square
(rms) value for all harmonics present in the output of a power source to the total rms
voltage at the output, for a pure sine-wave output. The lower the THD, the better the
power source.
Total Information Manager (TIM). See HP NonStop™ Technical Library (NTL).
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 on 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