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

Glossary
HP NonStop S-Series Planning and Configuration Guide—523303-015
Glossary-69
ohm
Distributed Systems Management/Software Configuration Manager (DSM/SCM) (which
in turn runs SYSGENR) to generate a system image for the new configuration.
ohm. The standard unit for measuring resistance.
online. Used to describe tasks that can be performed while the HP NonStop™ Kernel
operating system and system utilities are operational. Contrast with offline
.
online change. Any change that can be performed while an application or its system
resources are operational. In some situations, online changes might temporarily affect
subsystem and application availability. For example, altering the characteristics of a
communications line might temporarily affect applications that use the communications
line. Contrast with offline change
.
Online Support Center (OSC). The group of support specialists within the HP Global
Customer Support Center (GCSC) who respond to telephone calls regarding system
problems and diagnose malfunctioning systems using remote diagnostic links.
open file. In the Open System Services (OSS) file system, a file with a file descriptor.
open file description. In the Open System Services (OSS) file system, a data structure
within an HP NonStop™ node that contains information about the access of a process
or of a group of processes to a file. An open file description records such attributes as
the file offset, file status, and file access modes. An open file description is associated
with only one open file but can be associated with one or more file descriptors.
open migration. In the Open System Services (OSS) file system, the set of events and
outcomes that occur when an open file description is inherited by a child process in a
different processor than its parent process. Contrast with open propagation
.
open propagation. In the Open System Services (OSS) file system, the set of events and
outcomes that occur when an open file description is inherited by a child process in the
same processor as its parent process. Contrast with open migration
.
Open SCSI. A subsystem that provides the hardware and software for a SCSI-2 open
interface that runs on HP NonStop™ S-series servers and to which developers can
attach small computer system interface (SCSI)
devices.
open system. A system with interfaces that conform to international computing standards
and therefore appear the same regardless of the system’s manufacturer. For example,
the Open System Services (OSS) environment on HP NonStop™ systems conforms to
international standards such as ISO/IEC IS 9945-1:1990 (ANSI/IEEE Std. 1003.1-
1990, also known as POSIX.1), national standards such as FIPS 151-2, and portions
of industry specifications such as the X/Open Portability Guide Version 4 (XPG4).
Open System Services (OSS). An open system environment available for interactive or
programmatic use with the HP NonStop™ Kernel operating system. Processes that run
in the OSS environment usually use the OSS application program interface. Interactive