RDF/IMP and IMPX System Management Manual (RDF 1.4+)

Online Database Synchronization
HP NonStop RDF/IMP and IMPX System Management Manual—524388-001
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Phases of Online Database Synchronization
16. When the extractor has logged the message indicating it has completed its role in
the online synchronization operation, issue the RDFCOM START UPDATE
command on your primary system.
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.
Phases of Online Database Synchronization
Online database synchronization, whether for entire databases or selected volumes,
occurs in two phases for both the extractor and all updaters.
Extractor Phases
The extractor phases of online database synchronization are as follows:
Phase 1, Part 1
The extractor has received the STOP SYNCH message (indicating the load or backup
operation is complete) and has reached the first TMP control point record in the audit
trail that was generated after the load or backup operation completed. At this time, the
extractor begins building a list of all transactions that might have been started during
the create/load or backup operation.
Upon completion of phase 1, part 1, the extractor logs message 766.
Phase 1, Part 2
The extractor has reached the next TMP control point record in the audit trail and now
has a list of all transactions that might have been started during the create/load or
backup operation. The extractor generates a synch-phase-1-complete record, and
then continues its normal operation.
Upon completion of phase 1, part 2, the extractor logs message 767.
Phase 1, Part 3
When the extractor encounters the next TMP control point record and all of the
transactions in the list have finished, the extractor generates a special synch-complete