RDF System Management Manual for H-Series RVUs (RDF 1.8)

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.
Changing Configuration Parameters
After RDF starts, you can change the following configuration parameters online as the need
arises:
• The priority at which each RDF process runs
• The EMS log
• RETAINCOUNT
• PURGETIME (altering this parameter causes the purger to perform a purge pass immediately)
• UPDATERDELAY
These are the only configuration parameters that can be altered while RDF is running. To change
any other configuration parameters, you must first stop RDF or UPDATING as directed in
“Restarting RDF” (page 133).
To change parameter values, you access RDFCOM and use the ALTER command. ALTER is a
restricted command; it can be issued only by members of the super-user group. See the description
of the ALTER command in Chapter 8 (page 173).
Process Priority
All configured RDF processes should run at a priority greater than that of any application process.
Furthermore, the RDF processes should run at priorities relative to one another:
• On the primary system, the monitor and extractor processes can run at the same priority
but it is recommended that you set the extractor’s priority slightly lower than that of the
monitor.
• On the backup system, the receiver process should run at a higher priority than any updater
process.
The STATUS RDF display shows the priority at which each RDF process is running. Suppose
this display indicates that the monitor currently runs at a priority of 165. To change its priority
to 170, use the ALTER command:
]ALTER MONITOR PRIORITY 170
EMS Logs (Collectors)
In an RDF configuration, two EMS logs (collectors) exist: one at the primary system and the other
at the backup system. The log on the primary system is used by the monitor, RDFCOM, and
extractor and RDFNET processes. The log on the backup system is used by the receiver, updater,
and purger processes.
To redirect messages from the current EMS log to the log named $EMSC (on the control subvolume
CHICAGO), enter:
]ALTER RDF LOGFILE $EMSC
116 Operating and Monitoring RDF