NonStop System Glossary

Expand-over-ServerNet line-handler process handles incoming and outgoing Expand messages. It
also handles packets leaving the server and security-related messages going between systems
within a ServerNet cluster. Each node in a ServerNet cluster must be configured with an
Expand-over-ServerNet line-handler process for every other node in the ServerNet cluster.
expansion service processor (ESP)
A service processor (SP) that is not a master service processor (MSP). ESPs occur in pairs in groups
02 through nn (not in group 01). See also master service processor (MSP).
explicit DLL
See 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.
Explicitly Parallel Instruction Computing (EPIC)
The technology that forms the basis for the Itanium architecture. EPIC technology allows parallel
processing opportunities to be explicitly identified by the compiler before the software code is
executed by the processor.
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.
extended link format (ELF)
A standard binary file format common on UNIX systems. The ELF format is used for
position-independent code (PIC) files on both TNS/R and TNS/E.
extensible input/output (XIO)
A redesign of the 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.
E 83