NonStop S-Series Planning and Configuration Guide (G06.26+)

Glossary
HP NonStop S-Series Planning and Configuration Guide—523303-017
Glossary-26
DISKGEN
DISKGEN. A system generation option that invokes the DISKGEN program to copy directly
to disk the files necessary to generate an HP NonStop™ operating system. DISKGEN
can be used instead of a system image tape (SIT).
DISK object type. The Subsystem Control Facility (SCF) object type for all disk devices
attached to your system.
disk volume. See volume.
distributed system. A system that consists of a group of connected, cooperating
computers.
Distributed Systems Management (DSM). A set of tools used to manage HP NonStop™
systems and Expand networks.
Distributed Systems Management/Software Configuration Manager (DSM/SCM). A
graphical user interface (GUI)-based program that installs new software and creates a
new HP NonStop™ operating system. DSM/SCM creates a new software revision and
activates the new software on the target system.
distribution subvolume (DSV). A subvolume containing program files for a particular
software product along with the release version update (RVU) document (softdoc) file
for that product. The format for a DSV name is Y
nnnnrrr or Rnnnnrrr, where nnnn
is the software product number and
rrr is the base version identifier (such as D20) or
software product revision (SPR) identifier (such as AAB).
DLC. See data link control (DLC).
DLL. See dynamic-link library (DLL).
DMA. See direct memory access (DMA).
DNS. See Domain Name System (DNS).
DNS server. A server that resolves hostnames to Internet protocol (IP) address mapping
queries. These queries originate from either client computers, which are known as
resolvers, or other Domain Name System (DNS)
servers, which accounts for the
distributed nature of DNS. See also Network Information Service (NIS)
.
domain. (1) In the Internet, a part of the naming hierarchy. Syntactically, a domain name
consists of a sequence of names (labels) separated by periods (dots). (2) In an HP
NonStop™ S-series server, a pair of service processors, the associated router clouds,
and the attached replaceable units. (3) A set of objects over which control or ownership
is maintained. Types of domains include power domains and service processor (SP)
domains.
Domain Name System (DNS). A system that defines a hierarchical, yet distributed,
database of information about hosts on a network. A domain name is a meaningful and
easy-to-remember handle for an Internet address. The network administrator