The core InSight "system" is designed based on the SNMP (Simple
Network Management Protocol) systems management standard. SNMP is a
widely deployed protocol and data model used to exchange management
information between manager programs and managed devices. SNMP was
chosen because of its simplicity and efficiency and because newer,
more complex management models can be supported at a later time in
parallel with SNMP support. Programmers of InSight user
applications should become familiar with SNMP concepts of system
management and MIB (Management Information Base) design and usage.
InSight consists of several key components that allow user access
to managed device information. User applications interface with the
controller agent. The controller agent resides on all store
controllers and communicates with both user applications and
terminal device agents. The data view from a user application is
that all terminal data is viewed through the controller agent.
The InSight controller agent is a 32-bit multi-threaded application
that supports multiple, simultaneous client sessions. Client
sessions are anticipated to be both SNMP manager programs and
applications written directly using the InSight Direct Access (IDA)
APIs. The purpose of this documentation is to describe the IDA
interface.
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