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

Glossary
HP NonStop S-Series Planning and Configuration Guide—523303-015
Glossary-83
read/write head
read/write head. An electromagnet that can pick up (read) electronic pulses and record
(write) electronic pulses on a magnetic disk or tape. The electronic pulses are
interpreted by the processor as binary data. See also disk drive
and tape drive.
real group ID. An attribute of an Open System Services (OSS) process. When an OSS
process is created, the real group ID identifies the group of the user or parent process
that created the process. The real group ID can be changed after process creation.
real user ID. An attribute of an Open System Services (OSS) process. When an OSS
process is created, the real user ID identifies the user or parent process that created
the process. The real user ID can be changed after process creation.
$RECEIVE. The name of a file through which a process receives and optionally replies to
messages from other processes.
reconfiguration. The act of changing the hardware or software configuration of a running
system. Examples include installing a new software release version update (RVU),
adding hardware peripherals, and restructuring a database. Reconfiguring a system
might or might not require a planned outage.
reduced instruction-set computing (RISC). A processor architecture based on a relatively
small and simple instruction set, a large number of general-purpose registers, and an
optimized instruction pipeline that supports high-performance instruction execution.
Contrast with complex instruction-set computing (CISC)
.
reexported library. A library whose symbols are made available by another dynamic-link
library (DLL) to any localized client of that DLL. Reexport is an attribute of the DLL’s
libList entry for that library. This attribute is specified by the DLL’s programmer and
recorded by the linker as a DLL is built. It affects only localized clients of the DLL. This
feature allows a symbol to be moved from one DLL to another without relinking clients
of the original DLL.
Reexporting is transitive; that is, if A reexports B and B reexports C, then A reexports
C. Reexported libraries can reexport other libraries to form a succession of reexported
libraries of arbitrary length.
reference page. In Open System Services (OSS) and Distributed Computing Environment
(DCE), the online or hard-copy version of a file that provides reference information for
a software facility. Some UNIX product externals and end-user publications use the
term
man page instead, referring either to the online delivery mechanism used to
display the file (usually the shell
man command) or to the nature of the file as part of a
publication.
register-exact point. A synchronization location within an accelerated object file at which
both of these statements are true:
•
All live TNS registers plus all values in memory are the same as they would be if
the object file were running in TNS mode or TNS interpreted mode or on a TNS
system.