TMF Reference Manual (G06.24+)

TMFCOM Commands
HP NonStop TMF Reference Manual—522418-002
3-130
DUMP FILES
Security Restrictions
You can issue the DUMP FILES command only if you are a member of the super user
group.
TMF State Requirement
Before you can enter the DUMP FILES command, TMF must be started.
Usage Guidelines
The DUMP FILES command dumps the specified audited files to disk if the
DISKMEDIA option is specified; otherwise, this command dumps them to tape.
The more frequently you make online dumps, the less time file recovery requires.
Either of the following strategies, or some combination of both, effectively protects your
databases:
•
To protect specifically against media failures, request online dumps by volume.
•
To protect specifically against damage to a selected application, request online
dumps of the database that belongs to that application.
If an online dump fails before all of the specified audited files are dumped, the amount
of the dump that has completed successfully is saved. In most cases, the TMP
automatically determines the last file that was successfully dumped and implicitly
reissues the DUMP FILES command with the START option specifying the file at which
the dump is to resume. In other cases, however, you might have to perform this restart
yourself, as follows:
•
Use the INFO DUMPS command to determine the last file that was successfully
dumped.
•
Issue a new DUMP FILES command with the START option, specifying the file on
which the dump is to resume.
To avoid dumping your entire database by mistake, use a fully qualified file name for
start-file in the START parameter of the DUMP FILES command.
Note. For both online dumps and audit dumps, Expand links to remote disk volumes must
support 56 KB input/output.
Caution. Error messages generated by TMF and other subsystems during online dump
operations can sometimes have a vital impact that is not always obvious. For example, a disk
or tape parity or checksum error can prevent a file from being dumped. For this reason, you
should check the individual messages and summary information displayed by the DUMP
FILES command to ensure that you are aware of all such errors. In addition, you can use the
INFO DUMPS
command to verify that all the intended files were dumped.