TMF Operations and Recovery Guide (G06.26+)

Recovery Methods
HP NonStop TMF Operations and Recovery Guide—522417-003
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Preventive Maintenance
Preventive Maintenance
Recovering from certain problems on your TMF system can be greatly simplified if you
perform the following tasks:
•
Make online dumps to tape at least once a week; make two copies (if the only copy
becomes unusable, file recovery may be impossible).
•
Make audit dumps to tape as needed; make two copies (if the only copy becomes
unusable, file recovery may be impossible).
•
Perform the following tasks once daily:
•
Make a command file for re-creating each online and audit dump entry
recorded in the TMF catalog. Use the following TMFCOM command to create
the command file:
TMF 36> INFO /OUT filename / DUMPS *.*.*, OBEYFORM, &
>>>SERIAL serial-number
•
Back up the TMF configuration subvolume, whose location is listed in the
$SYSTEM.ZTMFCONF.CONFVOL file. The default location is
$SYSTEM.ZTMFCONF. If your system uses a subvolume other than the
default, be sure to back up the file $SYSTEM.ZTMFCONF.CONFVOL as well.
•
Run the Disk Space Analysis Program (DSAP) to obtain a hardcopy listing with
the following information for all disk volumes on the system: available space,
broken files, and redo-needed files. Use this command to generate the report:
> DSAP $*, BROKEN, ROLLFORWARD
Always keep copies of these command files and reports, as well as the latest
version of any command files used to configure TMF (or the output listing from the
INFO TMF command).
There are also actions that can make recovery procedures more difficult to perform:
•
Do not stop TMF when you do not know how to fix a problem. The only tasks that
require you to stop TMF are:
°
Deleting the TMF configuration with the DELETE TMF command.
°
Changing the TMF configuration volume, changing the audit-trail format for the
TMF configuration, or changing the TRANSACTIONPROTOCOL performance-
tuning attribute with the ALTER TMF command.
•
Do not delete the TMF configuration unless you want to make major changes to it.
This action deletes audit-trail information, volume and file recovery information,
and online dump information from the TMF catalog. When a DELETE TMF
command completes, all that remains is an empty TMF configuration, without audit
trails and with default values for other TMF components.