OSI/MHS Management Programming Manual
Introduction to Management Programming for 
OSI/MHS
OSI/MHS Management Programming Manual—424824-001
1-3
How Does Management Programming Apply to
OSI/MHS?
The programs that perform these functions are called management applications or 
programmed operators. A management application issues commands to and receives 
responses from subsystems, or retrieves event messages (or both) to help manage a 
system or a network of systems. A programmed operator is a management application 
that performs functions that might otherwise be performed by a human operator.
How Does Management Programming Apply to OSI/MHS?
OSI/MHS supports both interactive and programmatic interfaces for commands and 
event messages.  Compaq provides a number of DSM facilities to help you manage 
systems and networks. The DSM facilities include:
•
SCF (Subsystem Control Facility)
An interactive interface that allows a human operator to send DSM commands to 
many Compaq subsystems, including OSI/MHS.
•
SPI (Subsystem Programmatic Interface)
An interface that is used to build and decode messages sent between management 
applications (requesters) and subsystem manager processes (servers).
•
EMS (Event Management Service)
A service that provides event message collection, logging, and distribution facilities. 
EMS includes printing and distributor processes that can print or display event 
messages for operators. The OSI/MHS subsystem generates normal event messages 
and accounting event messages.
•
ViewPoint utility
A console application that includes screens to allow selective viewing of event 
messages.
The DSM programmatic interfaces for sending commands (control and inquiry) and 
retrieving event messages (event management) allow programs to perform the same kind 
of monitoring and control operations that users of SCF, EMS printing and compatibility 
distributors, and ViewPoint can perform interactively. This manual describes the DSM 
programmatic interfaces to the OSI/MHS subsystem.
Figure 1-2. Event Message or Accounting Message Interface
002CDT .CDD
Event Message
or Accounting Message
Subsystem
Human Operator
Or Application Program
OSI/MHS










