NonStop S-Series System Expansion and Reduction Guide

Glossary
G-Series Common Glossary
Glossary-48
impedance
impedance. The total opposition (that is, resistance and reactance) a circuit provides to the
flow of alternating current at a given frequency.
implementation-defined. Not specified by a standard. A correct value or behavior that is
implementation-defined can vary from system to system and therefore might represent
a feature or facility that cannot be ported.
implicit library. A library supplied by HP that is available in the read-only and execute-only
globally mapped address space shared by all processes without being specified to the
linker or loader. See also TNS system library
and public library.
implicit library import library (imp-imp). See import library.
implied user library. A method of binding TNS object files that have more than 16 code
segments. Segments 16 through 31 are located in the user code (UC) space but are
executed as if they were segments 0 through 15 of the user library (UL) code space.
This method precludes the use of a user library. Binder now supports 32 segments of
UC space concurrently with 32 segments of UL code space, so the implied user library
method is not needed in new or changed TNS applications.
import. To refer to a symbol definition from another loadfile. A loadfile imports a symbol
definition when it needs a data item or function having that symbolic name.
import control. The characteristic of a loadfile that determines from which other loadfiles it
can import symbol definitions. The programmer sets a loadfile’s import control at link
time. That import control can be localized, globalized, or semiglobalized. A loadfile’s
import control governs the way the linker and loader construct that loadfile’s searchList
and affects the search only for symbols required by that loadfile.
import library. A file that represents a dynamic-link library (DLL) and can substitute for it as
input to the linker. Import libraries facilitate linking on auxiliary platforms (that is, PCs)
where it is inconvenient to store the actual DLLs.
in-band control (IBC). A symbol-based communications protocol for communicating
management information across a ServerNet link without interfering with any
application traffic in the network. In ServerNet II architecture, IBC traffic uses standard
ServerNet packets. ServerNet I architecture uses the Illegal Symbol variation of IBC,
which uses a subset of the available symbols to convey control information from one
node to another. The symbol subset chosen is from the group of symbols that are not
used for passing data. These symbols are usually considered illegal or unused.
incident report. A report sent by the OSM or TSM server software to the respective OSM
or TSM Notification Director. If remote notification (dial-out) is configured, the
Notification Director forwards incident reports to a service provider. The three types of
incident reports are problem incident reports, periodic incident reports, and software
configuration incident reports.