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

Installing and Configuring RDF
Compaq NonStop™ RDF/IMP and IMPX System Management Manual—522204-001
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Configuring RDF
Note that in this example you do not need to issue a SET RDF BACKUPSWAP
command because $SYSTEM is the default.
LOGFILE Parameter
The LOGFILE parameter specifies the name of the EMS collector to which all RDF
command, event, error, and warning messages are to be directed.
The following commands specify the EMS collector $CTD25 as the RDF log file on
both the primary and backup systems:
]SET RDF LOGFILE $CTD25
]ADD RDF
The device on the primary system receives log messages from the extractor and monitor
processes (plus RDFCOM messages that are logged in message 835).
The device on the backup system receives log messages from the receiver, purger, and
all updater processes (plus RDFCOM messages that are logged in message 835).
SOFTWARELOC Parameter
The SOFTWARELOC parameter specifies where the RDF software is installed on both
the primary and backup systems. The default is $SYSTEM.RDF.
UPDATERDELAY Parameter
The UPDATERDELAY parameter specifies how many seconds (from 1 to 10) the
updater processes should delay upon reaching the logical EOF in the image trail before
attempting a new read operation. The default is 10 seconds.
This parameter should be left at the default value unless you have a very specific reason
for lowering it; lowering the UPDATERDELAY value could adversely impact updater
performance.
UPDATERRTDWARNING Parameter
The UPDATERRTDWARNING parameter specifies the RTD warning threshold (in
seconds, 0 or greater) for all configured updaters. The default is 60 seconds.
This threshold is used by the STATUS RTDWARNING command to determine which
updaters, if any, are to be included in its display. The display includes the monitor
process and only those RDF processes (extractor or updaters) whose RTD exceeds their
configured RTD warning threshold.
Note. In many cases, it is best to specify a volume other than $SYSTEM for the swap volume
on the backup system, particularly if the RDF configuration is large or if you require high
performance.