RDF/IMP, IMPX, and ZLT System Management Manual

Online Database Synchronization
HP NonStop RDF/IMP, IMPX, and ZLT System Management Manual—524388-002
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Partial Database Synchronization Issues
5. Use the SQLCI LOAD command with the PARTONLY and SHARED options to
load only the primary partition of the duplicate table. Note that you cannot use
PARTONLY with the LOAD command if your duplicate table has indexes.
Therefore, if you created your duplicate table with indexes, you must drop the
indexes.
6. When the load has completed, issue the RDFCOM STOP SYNCH command.
7. If you created the duplicate table on the primary system, then use the BACKUP
utility to put the entire duplicate table with all partitions onto tape. Note that
because you only loaded the one partition, all other partitions of this duplicate table
are empty.
If you created the duplicate table directly on the backup system, skip this step.
8. If you created the duplicate table on the primary system, then 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,
$DATA.DUP.PART is now on the backup system.
If you created the duplicate table directly on the backup system, skip this step.
9. Rename the original table on the backup system whose primary partition is being
synchronized to a temporary name using the SQLCI ALTER TABLE command
($DATA.TEST.PART becomes $DATA.TEMP.PART).
10. Rename the duplicate table on the backup system to the name of the original table
whose partition is being synchronized using the SQLCI ALTER TABLE command
($DATA.DUP.PART becomes $DATA.TEST.PART).
11. Use the BACKUP utility with the PARTONLY option to back up just the partition
you need synchronized to tape (the primary partition, in this example). Remember
that the duplicate table now has the name of the original table. Thus, you now
have on tape the loaded partition that you need to synchronize. Because the
partition has the correct name, you will not need to use MAP NAMES when you
eventually restore it.
12. Rename the duplicate table back to its original duplicate table name ($DATA.
TEST.PART becomes $DATA.DUP.PART).
13. Use SQLCI to drop the duplicate table. Note that by renaming the duplicate table
back to its original name before dropping it, you can preserve whatever indexes
exist on the backup system that are associated with the table being synchronized.
14. Rename the original table on the backup system from its temporary name back
to its original name using the SQLCI ALTER TABLE command ($DATA.
TEMP.PART becomes $DATA.TEST.PART).
15. 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.