RDF/IMP and IMPX System Management Manual (RDF 1.3+)

Operating and Monitoring RDF
Compaq NonStop™ RDF/IMP and IMPX System Management Manual—522204-001
4-21
Displaying Current Configuration Parameters and
Operating Statistics
STOP UPDATE
STOP RDF
STOP TMF
Note that although the occurrence of a critical error might mean that the primary and
backup databases are no longer synchronized with one another, that is not always the
case. If, for example, the primary CPU of the disk process goes down, all updater
processes affected by that error condition report a file system error and then attempt
to restart. If the error does not occur again when the affected updater processes
restart, the databases are probably still synchronized with one another. In that case,
the asterisks are cleared from subsequent STATUS RDF displays.
For more information on critical errors, you can scan the EMS collectors on the
primary and backup systems:
The EMS collector on the primary system contains log messages for the
extractor and monitor processes.
The EMS collector on the backup system contains log messages for the receiver,
purger, and all updater processes.
When RDF is not running, the STATUS RDF report indicates why. For example, the
report might indicate that the subsystem has never been started, or that it has crashed.
The report also indicates where processing resumes in the TMF audit trail when RDF is
restarted.
When the BREAK key is pressed while the STATUS RDF command is executing with
the PERIOD option (which requests repeated displays at a specified interval), the break
takes effect within one second rather than waiting until the end of the current interval.
Using RDF Status Data to Control TMF Audit Dumping
You can use the STATUS RDF command to determine when the RDF extractor has
finished processing the audit file that TMF wants to dump. The TMF/RDF trail listed
for the extractor in the STATUS RDF display indicates the TMF audit trail file that the
RDF extractor is currently processing.
Approximately 30 seconds after the STATUS RDF display shows that the extractor’s
sequence value is greater than the number of the audit trail that TMF wants to dump, it is
safe to mount the tape and let TMF dump the audit trail.