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

Entering RDFCOM Commands
HP NonStop RDF/IMP and IMPX System Management Manual—524388-001
8-100
Command Overview
2. Back up the database on the old backup system and restore it to the old primary
system.
3. Configure TMF on the old primary system.
4. Initialize RDF on the old primary system.
5. Restart TMF on the old backup system and turn the audit flags off on the backup
database.
6. Start the TMF and RDF subsystems on the old primary system.
7. Start the applications on the old primary system.
For further related considerations, see also Exception File Optimization in section 5.
Limitation
When building the undo list for an RDF takeover operation, the purger has a limit of
655,360 transactions. If this limit is exceeded, the purger process logs an RDF event
853 and abends. In this situation, contact your service provider.
Example
The following command sequence initiates RDF TAKEOVER processing in which the
backup system \TORONTO takes over processing from the primary system
\SANFRAN.
1. From the TACL command interpreter on the backup system (\TORONTO), enter:
>RDFCOM SANFRAN
2. From within the RDFCOM session, enter:
]TAKEOVER
3. RDF displays the following prompt message:
*** TAKEOVER assumes a disaster on \SANFRAN has occurred.
Are you sure you want to TAKEOVER?
To proceed with the TAKEOVER operation, enter Y or YES.
To stop the TAKEOVER operation, enter N or NO.
After you enter your response, RDFCOM prompts you for your next command.
4. Having initiated the RDF TAKEOVER operation, you can then use a STATUS RDF
command to determine the status of the TAKEOVER operation. If the TAKEOVER
operation is still in progress when you enter the STATUS RDF command, the
subsystem displays the current state as “TAKEOVER IN PROGRESS.”