RDF System Management Manual

Installing and Configuring RDF
HP NonStop RDF System Management Manual—524388-003
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Restarting the Applications
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The RDF configuration file contains all necessary parameters.
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All updater volumes on the backup system are enabled for transaction processing.
When RDF starts execution, it automatically performs a validation check on the
configuration file; if the check succeeds, RDF copies the configuration file
$SYSTEM.control-subvolume.CONFIG to the backup system.
If the RDF configuration file does not exist, or if there are any missing or invalid
parameters, RDFCOM displays an error message and aborts the start operation.
If you did not start TMF on the backup system, or if you did not add an updater volume
to the TMF configuration on the backup system and enable it for transaction
processing, the corresponding updater logs an RDF error and terminates immediately.
If you started TMF on the backup system and added the updater volume to the TMF
configuration but did not enable that volume for transaction processing, the updater
issues an error message and then stops.
If TMF BEGINTRANS is disabled, RDF issues an error message.
Unless you explicitly specify otherwise, RDF always starts with updating enabled: all
updater processes immediately begin updating their volumes by reading audit images
from the RDF image files and applying the appropriate changes to the backup
database files.
If you want to start RDF with the updater processes disabled, you should specify the
UPDATE OFF parameter in the START RDF command on the primary system as
follows:
]START RDF, UPDATE OFF
If you later want to start the updater processes, you merely issue a START UPDATE
command.
Restarting the Applications
As the final step in establishing an RDF environment, if you had shut down your
applications previously, you can restart them now.