Introduction to Networking for NonStop S-Series Servers

Open Systems Interconnection (OSI) Network
Connections
Introduction to Networking for HP NonStop S-Series Servers—520670-005
8-16
OSI Subsystem Management
The PAM subsystem is also described in Section 9, Local Area Network (LAN)
Connections.
OSI Subsystem Management
HP NonStop OSI products are fully integrated with HP Distributed Systems
Management (DSM) tools. (DSM is described in Section 4, Managing Communications
Subsystems.) All subsystems use the Event Management Service (EMS), a DSM
management interface. When an error occurs, the subsystem sends an event message
to EMS. You can view event messages using the OSM Event Viewer or TSM EMS
Event Viewer, HP OpenView, or NonStop NET/MASTER Management Services (MS).
All subsystems can be configured and controlled interactively using the services of the
Subsystem Control Facility (SCF).
OSI Application Example
Figure 8-5 on page 8-17 is an application example of the NonStop S-series server
acting as a fault-tolerant file server in an OSI network. The application servers have
been written to conform to Remote Database Access (RDA), an Application Layer
standard. Database requests originate on client systems on either a LAN or an X.25
PSDN. The application, called the RDA server, uses the Application Layer interface of
HP NonStop OSI/AS to receive requests from client systems.
The OSI products use the services of the PAM subsystem or X25AM, depending on
the underlying network environment. Having received the database requests, the
database server formulates Structured Query Language (SQL) statements, which it
passes to the SQL program.