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Responder Manager
OSI/FTAM Responder Manual—425199-001
6-3
Event Messages
If the Compaq FTAM responder process is running as a NonStop process pair, the
backup Compaq FTAM responder process takes over, and your remote application must
reinitiate its Compaq FTAM associations. You or your application should then check
and verify all previous work performed using the Compaq responder, correct
inappropriate file states left from the component failure, and proceed as appropriate to
the needs of your application.
The process of verifying work performed before a hardware or software component
failure and recovering from unknown file states is different for every application. The
main recovery strategies depend on the type of activity in progress during component
failure:
•
Reading from a file
•
Writing to a file that your application created
•
Writing to a file that already existed
In the case of reading a file, no recovery is necessary. The Compaq responder does not
modify files opened for reading only.
In the case of writing to a file, you should probably consider the file unusable. If you
created the original file, the best recovery might be to delete the unusable file and
recreate it. If you were writing to a file that you did not create and whose contents you
cannot retrieve—from a file backup, for example—recovery might not be possible. You
should design your application (making backups where necessary) with this in mind.
FTAM configurable files cannot be opened by the responder.
Event Messages
The Event Management Service (EMS) on Compaq systems enables the Compaq
problem solver to monitor problems and other significant events that occur during the
operation of Compaq FTAM and other Compaq software.
Whenever a Compaq process such as the FTAM responder detects an event that might
affect its operation, it generates an event message describing the event. Such event
messages can be related to hardware or software malfunctions, or to important changes
in the state of a system component. Text (readable) versions of these event messages
can be displayed as operator messages: for example, in an operator console log or on a
terminal running the ViewPoint operations console application. For detailed
information on the event messages sent by Compaq FTAM processes, see the OSIFTAM
and OSIAPLMGR sections of the Operator Messages Manual.
Event messages generated by FTAM responder and APLMGR processes can alert the
Compaq problem solver to the following kinds of problems:
•
System problems such as CPU failures, process failures, and unavailability of
system resources such as LCBs
•
Interoperability problems that cause protocol-error thresholds to be exceeded
•
Configuration problems, such as mismatches between the common names and OSI
addresses configured in the APLMGR MIB and those in the OSI manager MIB