ClearPath IX Systems Installation and Configuration Guide

CSIOP
D
DAC
daemon
datagram
See channel service I/O processor.
Abbreviation for disk array controller.
Glossary
A background process, often perpetual, that performs a system-wide public function.
Daemons run on the Single Point Operations (SPO) server in the background and perform
various services, including the management of all network activity pertaining to SPO/HMP
Console. The daemons must be running in order to run SPO/HMP Console.
A self-contained, independent entity of data (such as a piece of a message) that carries
sufficient information to be routed from a source to a destination computer without
reliance on earlier exchanges between the source and destination. Each datagram,
because it contains a source, a destination, and a data packet, can follow a different route
to the destination.
Data Management System (DMS 2200)
The CODASYL-based data manager that provides a fixed network database model.
DCOM
See Distributed Component Object Module.
DCOM/OLE Gateway (DGate)
A gateway supplied with the WebTx software that enables users to access OS 2200
applications from a Distributed Component Object Model (DCOM) environment. DGate is
available for the Windows NT environment of ClearPath IX servers.
directory database
A shared database of security information in a Windows NT domain that contains user
account names, passwords, and security settings. The computer designated as the primary
domain controller (PDC) contains the master copy of the database. Replicated copies are
hosted on one or more backup domain controllers (BDC) and are synchronized
periodically and automatically with the master copy.
directory service agent (DSA)
The server component defined in the X.500 standard for global directories. The DSA
executes requests from directory user agents (DUA) to read and update the directory
entries on the global directory server.
directory user agent (DUA)
The client component defined in the X.500 standard for global directories. An application
on a client workstation uses a local DUA to read and update the directory entries on a
global directory server.
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