NonStop S-Series Hardware Installation and FastPath Guide (G06.25+)

Glossary
HP NonStop S-Series Hardware Installation and FastPath Guide—529443-001
Glossary-34
explicit dynamic-link library (explicit DLL)
explicit dynamic-link library (explicit DLL). A dynamic-link library (DLL) that is named in
the libList of a client or is a native-compiled loadfile associated with a client.
export. To offer a symbol definition for use by other loadfiles. A loadfile exports a symbol
definition for use by other loadfiles that need a data item or function having that
symbolic name.
export digest. A mathematical hash of the exported symbol names and locations in a
library. Two libraries with the same export digest are interchangeable in that they both
export the same symbols at the same locations. They are not necessarily semantically
equivalent.
extended data segment. See selectable segment.
extensible input/output (XIO). A redesign of the HP NonStop™ operating system’s I/O
subsystem to enable it to extend itself in general ways to meet future requirements.
extent. A contiguous area on disk for allocating one file.
extent size. The size in bytes of a contiguous area on disk for allocating one file.
external entry-point (XEP) table. A table located in the last page of each TNS code
segment that contains links for calls (unresolved external references) out of that
segment.
external fabric connection. The low-level ServerNet connection between a node and one
of the external ServerNet fabrics. Each node has an X and a Y connection to the
external fabrics.
external routing. The routing of packets over the external ServerNet fabrics; that is,
between systems (or nodes) in a ServerNet cluster. See also internal routing.
external ServerNet fabrics. The fabrics that link systems in a ServerNet cluster. See also
internal ServerNet fabrics.
external ServerNet X or Y fabric. The X or Y fabric that links systems in a ServerNet
cluster. See also internal ServerNet X or Y fabric.
external system area network manager process (SANMAN). (1) A Guardian process
with the name $ZZSMN that provides management access to the external ServerNet X
and Y fabrics. (2) A Windows NT process that configures and maintains ServerNet
switches within a Windows NT cluster.
fabric. A complex set of interconnections through which there can be multiple and (to the
user) unknown paths from point to point. The term fabric is used to refer to the X or Y
portion of the ServerNet communications network; for example, the X fabric.
factory-installed operating system. The version of the operating system image that HP
creates having a CONFTEXT configuration file, OSIMAGE file, and configuration