6760 ServerNet/DA Manual

Glossary
6760 ServerNet/DA Manual—424879-003
Glossary-72
range of servers
troublesome interference signals are usually found in the kilohertz to low megahertz
range. At present, the terms radio frequency interference and electromagnetic
interference (EMI) are usually used interchangeably.
range of servers. See HP NonStop™ servers.
read-only file system. A file system with implementation-defined characteristics that restrict
changes to the files within that file system.
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)
.
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 location in an accelerated program at which the values in both
memory and the register stack are the same as they would be if the program were
running on a TNS processor. A register-exact point is also a memory-exact point
.
regular file. In the Open System Services (OSS) file system, a file that is a randomly
accessible sequence of bytes. A regular file contains binary or text data and has no
structure imposed by the system. Contrast with special file
.