Object Code Accelerator Manual

Glossary
Object Code Accelerator Manual—528144-003
Glossary-18
one-way communication
one-way communication. A form of interprocess communication where the sender of a
message (the requester) does not expect any data in the reply from the receiver of the
message (the server). Contrast with two-way communication.
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™ operating system. Processes that run in the
OSS environment usually use the OSS application program interface. Interactive users
of the OSS environment usually use the OSS shell for their command interpreter.
Synonymous with Open System Services (OSS) environment. Contrast with Guardian.
Open System Services (OSS) environment. The HP NonStop™ Open System Services
(OSS) application program interface (API), tools, and utilities.
opener table. A data structure maintained by a server process containing information about
processes that have the server process open. Typically, the server uses this table to
check that incoming requests originate from valid openers.
operating system. See HP NonStop™ operating system.
operational environment. The conditions under which your system performs. These
conditions include the devices and communications lines that are made active and the
system and application processes that are started at system startup.
OS. See HP NonStop™ operating system.
OSS. See Open System Services (OSS).
OSS environment. See Open System Services (OSS) environment.
OSS process ID. In the Open System Services (OSS) environment, the unique identifier
that identifies a process during the lifetime of the process and during the lifetime of the
process group of that process.
OSS signal. A signal model defined in the POSIX.1 specification and available to TNS
processes and TNS/R native processes in the OSS environment. OSS signals can be
sent between processes.
OSS user ID. See HP NonStop™ operating system user ID.
page. A unit of virtual storage for disks and processor memory. The size of a disk page is
2048 bytes. The size of a memory page varies depending on the processor type and
the software release.