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

Online Database Synchronization
Compaq NonStop™ RDF/IMP and IMPX System Management Manual—522204-001
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Partial Database Synchronization Considerations
5. If you created the duplicate table on the primary system, then you must use the
RESTORE utility to put the entire duplicate table with all its partitions onto disk on
the backup system. Note that you must use MAP NAMES to correct the system
name. Thus, $DATA.DUP.PART is now on the backup system.
If you created the duplicate table directly on the backup system, skip this step.
6. Rename the original table on the backup system whose primary partition is being
synchronized to a temporary name using the SQLCI ALTER TABLE command
($DATA.TEST.PART becomes $DATA.TEMP.PART).
7. Rename the duplicate table on the backup system to the name of the original table
whose partition is being synchronized using the SQLCI ALTER TABLE command
($DATA.DUP.PART becomes $DATA.TEST.PART).
8. Use the BACKUP utility with the PARTONLY option to back up just the partition
you need synchronized to tape (the primary partition, in this example). Remember
that the duplicate table now has the name of the original table. Thus, you now have
on tape the loaded partition that you need to synchronize. Because it has the correct
name, you will not need to use MAP NAMES when you eventually restore it.
9. Rename the duplicate table back to its original duplicate table name ($DATA.
TEST.PART becomes $DATA.DUP.PART).
10. Use SQLCI to drop the duplicate table. Note that by renaming the duplicate table
back to its original name before dropping it, you can preserve whatever indexes exist
on the backup system that are associated with the table being synchronized.
11. Rename the original table on the backup system from its temporary name back
to its original name using the SQLCI ALTER TABLE command ($DATA.
TEMP.PART becomes $DATA.TEST.PART).
12. Use the RESTORE utility with the PARTONLY option to put the loaded primary
partition of the duplicate table into the correct location. Note that MAP NAMES is
not required because the loaded partition now has the correct name on tape and can
be restored directly.
Entry-sequenced Tables
There is currently no reliable mechanism to synchronize entry-sequenced tables online.
Entry-sequenced tables should be synchronized offline.
SQL Indexes (With or Without Partitions)
To synchronize indexes with or without partitions, do the following:
1. Drop the indexes on the backup system.
2. Create new indexes on the backup system.
Note that with this method you do not use the RDFCOM STOP SYNCH command.