NBT Manual

Glossary
NBT Manual—424773-001
Glossary-7
Event Management Service (EMS)
Event Management Service (EMS). A part of DSM used to provide event collection, event
logging, and event distribution facilities. It provides for different event descriptions for
interactive and programmatic interfaces, lets an operator or application select specific
event-message data, and allows for the flexible distribution of event messages within a
system or network. EMS has an SPI-based programmatic interface for both reporting
and retrieving events. See also DSC.
or event message.
event management. The reporting and logging of events, the distribution and retrieval of
information concerning those events, and the actions taken by operations personnel or
software in response to the events. Compare control and inquiry
.
event message. A special kind of SPI message that describes an event occurring in the
system or network. Compare command message
.
Expand. The Expand subsystem enables you to link together as many as 255 geographically
dispersed Compaq systems to create a network with the same reliability, capacity to
preserve data integrity, and potential expansion as a single Compaq system.
extensible structure. In DSM programmatic interfaces, a structure declared for the value of
an extensible structured token. See also extensible structured token
. Compare fixed
structure.
extensible structured token. In DSM programmatic interfaces, a token consisting of a token
code and a value that is an extensible structure. Extensible structures can be extended by
adding new fields at the end in later releases. Such structures are typically used to
indicate the attributes of an object being operated on and to return status and statistics
information in responses; they can also be used for other purposes. The token is
referenced by a token map that describes the structure to SPI so that SPI can provide
compatibility between different versions of the structure. Compare simple token
.
fabric. A simplified way of representing a complex set of interconnections through which
there can be multiple and (to the user) unknown paths from point to point. The term
fabric is used to refer to the X or Y portion of the ServerNet system area network
(ServerNet SAN), for example the X fabric.
FDDI. See Fiber Distribution Data Interface (FDDI)
.
Fiber Distribution Data Interface (FDDI). An emerging standard for a network technology
based on fiber optics. FDDI specifies a 100-mbps data rate using 1300-nanometer light
wavelength, and limits networks to approximately 200 km in length, with repeaters
every 2 km or less. The access control mechanism uses token-ring technology.
File Transfer Protocol (FTP). The Internet standard, high-level protocol for transferring files
from one machine to another. Usually implemented as application level programs, FTP
uses the TELNET and TCP protocols. The server side requires a client to supply a login
identifier and password before it will honor requests.