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

trigger-type
is REVERSE or TAKEOVER. This command parameter alters a trigger that has already been
added to the RDF configuration.
Where Issued
These commands can be issued only at the primary system, except ALTER TRIGGER, which can
be issued at the backup system if the primary system is not available.
NOTE: If you alter one or more trigger attributes on the backup system while the primary
system is down and the primary system once again becomes available, you should perform the
same alter operation(s) on the primary system before starting RDF. If you don’t do that the
changes are lost because, when it starts, RDF automatically copies configuration information
from the primary system to the backup system.
Security Restrictions
You can issue the ALTER command if you are a member of the super-user group.
RDF State Requirement
While RDF is running, the only configuration parameters you can alter are the log file, the purge
time, the RDF updater delay, and the priority of each RDF process. You can also change the RDF
updater open while RDF is running, but updating must be stopped. To change the setting of any
other parameter, you must first stop RDF.
Usage Guidelines
Before entering the ALTER command, you can display the current configuration parameters
with the INFO RDF command. After entering ALTER, you can confirm your changes by again
entering INFO RDF.
If you use an ALTER RECEIVER command to change the EXTENTS parameter, the change will
occur on the next RDF image file rollover, unless RDF has never been started since its last
reinitialization.
Although you can use the SET RECEIVER RDFVOLUME command to specify the disk volume
used for the master image trail, you cannot re-specify this volume by entering an ALTER
RECEIVER RDFVOLUME command. To change this volume, you must reinitialize RDF and use
another SET RECEIVER RDFVOLUME command followed by an ADD RECEIVER command.
If you need to change an updater’s image trail volume, it is recommended that you stop TMF;
wait for RDF to stop; delete the volume; re-add the volume back into the configuration, associating
it to a different image trail volume; and then restart the TMF and RDF subsystems. This is the
only way to ensure that the backup database will remain synchronized with the primary database.
NOTE: Altering the RDF UPDATERDELAY value is not recommended unless you have a very
specific reason for doing so; any value less than the default (10 seconds) can affect updater
performance.
Examples
To change the priority at which an extractor process is currently running, issue an ALTER
EXTRACTOR PRIORITY command. For example, the following command changes the execution
priority of the master extractor process to 170:
]ALTER EXTRACTOR PRIORITY 170
The following command changes the execution priority of the auxiliary extractor process
associated with the auxiliary audit trail AUX02 to 170:
]ALTER EXTRACTOR ATINDEX 2 PRIORITY 170
182 Entering RDFCOM Commands