TCP/IP (Parallel Library) Migration Guide

Glossary
HP NonStop TCP/IP (Parallel Library) Migration Guide—522272-003
Glossary-2
driver/interrupt handler (DIH)
driver/interrupt handler (DIH). QIO-based drivers used by the SLSA subsystem to
communicate with the appropriate adapter type over the ServerNet system area
network (SAN). The DIHs control the ServerNet adapters and use system-library
routines accessible to LAN service-provider processes (such as TCP/IP).
DSM. See Distributed Systems Management.
E4SA. See Ethernet 4 ServerNet adapter (E4SA).
EMS. See Event Management Service (EMS).
error. In DSM interfaces, a condition that causes a command or other operation to fail.
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.
Ethernet. A popular local area network technology invented at the Xerox Corporation Palo
Alto Research Center. An Ethernet itself is a passive coaxial cable; the
interconnections all contain active components. Ethernet is a best-effort delivery
system that uses CSMA/CD technology. Xerox Corporation, Digital Equipment
Corporation, and Intel Corporation developed and published the standard for 10 Mbps
Ethernet.
Ethernet 4 ServerNet adapter (E4SA). A ServerNet adapter for Ethernet local area
networks (LANs) that contains four Ethernet ports.
event. In DSM terms, a significant change in some condition in the system or network.
Events can be operational errors, notifications of limits exceeded, requests for action
needed, and so on.
event log. A file or set of files maintained by EMS to store event messages generated by
subsystems.
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.
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 Distributed Systems Management or event message.