NonStop System Glossary

atomic
Behaving as a single, indivisible operation. For example, an atomic write operation on a file cannot
write data that is interleaved with data from another, concurrent write operation on that file.
attachment
A file that contains information that augments the information in an incident report.
attribute
1. For the Subsystem Control Facility (SCF), a characteristic of an entity. For example, two attributes
of a process might be its program file and its user ID. An attribute is sometimes called a modifier.
2. In client interfaces for OSM and TSM, a data item associated with a system or cluster resource.
All attributes can be viewed, and some can be modified.
audit
A Distributed Systems Management/Software Configuration Manager (DSM/SCM) activity initiated
by the operator at a target system that updates the target database with the fingerprints of all the
files in a selected set of target subvolumes (TSVs).
authentication attributes
Security attributes of a process that do not change unless a successful reauthentication occurs or
the super ID changes them. For Open System Services (OSS) processes, the authentication attributes
include the login name, real user ID, real group ID, authentication system (node name), and group
list.
authentication header (AH)
A dedicated TCP/IP extension header that ensures authenticity and integrity of the IP packet. It
also provides an optional anti-replay service. Its presence guards against illegal modification of
the IP fixed fields, packet spoofing and, optionally, against replayed packets. AH can be used
alone or with the encapsulating security payload to provide the desired security features for IP
traffic. See also encapsulating security payload (ESP) and security association (SA).
authorization attributes
Security attributes of a process that can change through use of functions such as setuid() (or
of Guardian procedures such as PROCESS_CREATE_) without reauthentication. For Open System
Services (OSS) processes, the authorization attributes include the effective user ID, saved-set user
ID, saved-set group ID, user audit flags, and effective user name.
authorization key
A password required for logging on to a modem. If you plan to allow dial-outs to a service provider,
you must specify the authorization key of the service provider’s modem during configuration of the
Notification Director in OSM or TSM.
automated cartridge subsystem (ACS)
A type of tape library. Also known as automated cartridge system.
Automated Data Processing (ADP)
The term used in the FIPS PUB 94 document to refer to computerized data processing equipment
that is installed inside a computer room.
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