RDF System Management Manual for J-series and H-series RVUs (RDF 1.10)

Notice that these commands prevent any disk volumes on the local system from being enabled
for TMF operations before starting the subsystem.
3. Reenable all pertinent disk volumes for TMF operations by entering the following command
through TMFCOM:
~ENABLE DATAVOLS *
When this command is executed, TMF performs its volume recovery operation on the audited
volumes, and RDF reads the audit during this operation.
4. Restart RDF through RDFCOM by entering:
]START RDF
NOTE: Normally you start RDF before starting your applications. If the TMF subsystem has
crashed on the primary system, however, characteristics of the TMF audit trail after the TMF
subsystem is restarted require that you restart your applications before restarting RDF. This
allows audit records to be generated in the MAT and any auxiliary audit trails involved in
your RDF environment. At that point you restart RDF.
If you started RDF before starting your applications, you might notice that the auxiliary extractor
continues to read the same data over and over again without moving forward. To correct that
situation, you merely stop and then restart the RDF subsystem.
5. Restart your applications.
TMF Subsystem Failure on the Backup System
RDF can recover from a TMF failure on the backup system if the TMF volume recovery operation
is successful after the failure. To perform this recovery:
1. From the primary system, stop updating of the backup database by entering this command
through RDFCOM:
]STOP UPDATE
2. Correct the problem on the backup system and recover the volume.
3. From the backup system, restart TMF on the backup system by entering this command through
TMFCOM:
~START TMF
4. From the primary system, resume updating of the backup database by entering this command
through RDFCOM:
]START UPDATE
Volume Recovery Processing
RDF handles volume recovery automatically.
Volume Recovery Failure
RDF cannot recover from a TMF subsystem failure if TMF cannot successfully perform volume
recovery. After the TMF failure has been resolved, you must perform the following tasks:
1. Resynchronize the primary and backup databases, following procedures explained in Chapter 6
(page 148) and Chapter 7 (page 158).
2. Reinitialize RDF.
File Recovery on the Primary System
A file recovery operation occurs whenever a TMFCOM RECOVER FILES command is issued at the
primary system. A simple file recovery operation does not affect RDF nor does it require database
synchronization. A file recovery operation to a timestamp or a first purge, however, does require
you to stop RDF, reinitialize, and resynchronize the affected files.
Responding to Operational Failures 121