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

Online Database Synchronization
Compaq NonStop™ RDF/IMP and IMPX System Management Manual—522204-001
7-11
Partial Database Synchronization Considerations
Enscribe Files Without Partitions
Key-sequenced Files
First create a non-audited duplicate file on the primary system and then load it.
Issue the RDFCOM STOP SYNCH command and then use BACKUP and RESTORE
(or FUP DUP) to move the duplicate file to the backup system.
Alternatively, you can use the create and load method to put the duplicate files directly
on the backup system, provided you have enough Expand capacity to handle both the
data being loaded and the audit being shipped to the backup system by the extractor.
If you created the duplicate file with the LIKE option and the primary file has an
alternate key file, then the file label of the duplicate file will point to the alternate key
file on the primary system. Therefore, you must use a FUP ALTER command to
manually alter the file label so it points to the alternate key file on the backup system
after the file is restored on the backup system . For example:
FUP ALTER $DATA.TEST.PART0100,
ALTFILE ( 0, \BACKUP.$DATA.TEST.ALTF0100 )
Relative Files
No special considerations apply. You can use the same method as described for key-
sequenced files, above.
Entry-sequenced Files
There is currently no reliable mechanism to synchronize entry-sequenced files online.
Entry-sequenced files should be synchronized offline.
Unstructured Files
There is currently no reliable mechanism to synchronize unstructured files online.
Unstructured files should be synchronized offline.
Enscribe Files With Partitions
Key-sequenced Files
First create a non-audited duplicate file on the primary system. Note that you must
create the entire file with all partitions. Then, you only need to load the partition that
you need. For example, suppose the file has two partitions: $DATA1.TEST.PART0100
(primary) and $DATA2.TEST.PART0100 (secondary). Issue the following command:
FUP CREATE $DATA1.TEMP.PART0100,
LIKE $DATA1.TEST.PART0100, NO AUDIT
That command creates the two files $DATA1.TEMP.PART0100 (primary partition) and
$DATA2.TEMP.PART0100 (secondary partition).