TCP/IP Configuration and Management Manual

Glossary
TCP/IP Configuration and Management Manual—427132-004
Glossary-4
Distributed Systems Management
Distributed Systems Management. A set of tools used to manage NonStop systems and
EXPAND networks. These tools include the VIEWPOINT console application, the
Subsystem Control Facility (SCF) for data communications subsystems, the
Subsystem Programmatic Interface (SPI), the Event Management Service (EMS), the
Distributed Name Service (DNS), and token-oriented programmatic interfaces to the
management processes for various NonStop subsystems.
distributor. An EMS process that distributes event messages from event logs to requesting
management applications, to Guardian console message destinations, or to a collector
on another node. See also connection
. Contrast collector.
DNS (Domain Name Server). See Domain Name Server.
Domain Name Server. A method for naming resources. The basic function of the domain
name server is to provide information about network objects by answering queries.
Domain. In the Internet, a part of the naming hierarchy. Syntactically, a domain name
consists of a sequence of names (labels) separated by periods (dots).
DSM. See Distributed Systems Management.
E4SA. See Ethernet 4 ServerNet adapter (E4SA).
ECHO. The name of a program used in the Internet to test the reachability of destinations by
sending them an ICMP echo request and waiting for a reply.
EMS (Event Management Service). See Event Management Service (EMS).
EMS standard definitions. The set of declarations provided by EMS for use in event
management, regardless of the subsystem. Any application that retrieves tokens from
event messages needs the EMS standard definitions.
See also definition or definition
files. Comparedata communications standard definitions
or SPI standard definitions.
error. In DSM interfaces, a condition that causes a command or other operation to fail.
Contrast
Warning.
error number. In DSM programmatic interfaces, a value that can be assigned to a return
token, or to the last field of an error token, to identify an error that occurred. Some error
numbers are defined in the data communications (ZCOM) definitions; others are
defined by individual subsystems.
error token. In DSM programmatic interfaces, a token in a response message that indicates
the reason an error occurred during a programmatic command. NonStop subsystems
enclose each error token in an error list, which can also contain additional information
about the error. A response record must contain a return token and can also contain
error lists to explain the error further. The token code for the error token is ZSPI-TKN-
ERROR. Its value is a structure consisting of the subsystem ID and an error number
identifying the error.
See also error list, error number, or return token.