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

Online Database Synchronization
Compaq NonStop™ RDF/IMP and IMPX System Management Manual—522204-001
7-6
Example of Synchronizing An Entire Database
Online
If you created the duplicate files and tables on the primary system and then moved them
over to the backup system, however, you must be aware of the following:
•
If you move duplicate partitioned Enscribe files whose volume mappings differ
between the primary and backup systems, you must use a FUP ALTER command to
alter the file labels of the duplicate files on the backup system so they reflect the
correct volume mapping of the various partitions on the backup system.
For example, suppose you have a partitioned Enscribe file on the primary system
whose primary partition is on $DATA1 and secondary partition is on $DATA2. If,
on the backup system, the primary partition is on $DATA1 but the secondary
partition is on $DATA3, you must change volume name in the file label of the
duplicate secondary partition from $DATA2 to $DATA3 as follows:
FUP ALTER $DATA1.subvol.file, PART (1,$DATA3)
•
If you move duplicate Enscribe alternate key files, you must alter the system name
in the file label of the duplicate file or table to specify the backup system.
For example, if you moved a duplicate Enscribe alternate key file named ALTF0100
associated with the file PART0100, you must change the system name in the file
label of the duplicate alternate key file to that of the backup system as follows:
FUP ALTER $DATA1.TEST.PART0100
ALTFILE (0,\backup.$DATA.TEST.ALTF0100)
•
If you use the SQLCI DUP command to move duplicate partitioned SQL tables, you
must use the MAP NAMES option to specify the backup system name.
•
If you use the SQLCI DUP command to move SQL tables with index tables, you
must use the MAP NAMES option to specify the backup system name.
Example of Synchronizing An Entire Database Online
Following is a summary of the steps necessary to perform an online synchronization of
an entire database.
1. Issue the following RDFCOM command:
STOP RDF
2. Purge the RDF control subvolume and then issue the following RDFCOM
command:
INITIALIZE RDF, BACKUPSYSTEM \RDFB, SYNCHDBTIME 17JUN2000 17:05 !
Note. If you have multiple RDF environments, you can do online synchronization within
one RDF environment without disturbing any of the other RDF environments. Just be sure
to include the appropriate SUFFIX parameter in the above INITIALIZE RDF command.