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

Online Database Synchronization
Compaq NonStop™ RDF/IMP and IMPX System Management Manual—522204-001
7-10
Partial Database Synchronization Considerations
FUP ALTER $DATA.TEST.PART0100,
ALTFILE ( 0, \BACKUP.$DATA.TEST.ALTF0100 )
Note that the above command does not pertain to SQL indexes because their labels
are automatically corrected by the MAP NAMES option of the RESTORE utility.
7. After all the duplicate tables and files have been placed on the backup system and
the extractor has logged the message indicating it has completed its role in the
online synchronization operation, issue an RDFCOM START UPDATE command
on the primary system.
The above procedure synchronizes all tables and files on one or more data volumes. If
you need to synchronize only a single table or file and you want to do that online, you
must still synchronize the entire data volume on which it resides.
Partial Database Synchronization Considerations
Typically you will do a partial database synchronization for either of two reasons: you
are adding a new volume to the RDF configuration that was not previously in your
configuration or you have encountered a problem with a volume that has caused you to
delete the volume from the RDF configuration and you are now ready to add it back into
the configuration.
To use any of the partial database synchronization protocols described below, it is
presumed that:
1. You have already added the volume needing synchronization to the RDF
configuration.
2. You are currently now running RDF with update off.
There are special considerations for each table and file type. Those considerations are
discussed under separate topics, below.
Finally, regardless of what methods you use and what types of tables or files need
synchronization, you must only issue the RDFCOM START UPDATE command after
copies of ALL files needing synchronization have been placed in the correct locations on
the backup system; that is, after you have executed all of the steps outlined below.
Note. In the discussions that follow, please note that whenever the RDFCOM STOP SYNCH
command is mentioned, you must wait to issue that command until you have loaded or backed
up all tables and files involved in the overall synchronization operation.