TMF Planning and Configuration Guide (G06.24+)

Moving Between Earlier TMF Environments and D46
HP NonStop TMF Planning and Configuration Guide—522416-004
A-4
Preparing for Fallback
4. Install any altered programs and third party products that retrieve
information from the audit trail.
5. Restart TMF.
Preparing for Fallback
As part of fallback, it is recommended that you purge all format 2 files. Before doing
so, however, use FUP LOAD or FUP COPY to load any format 2 files that contain
useful data back into one or more format 1 files (then make new backups or online
dumps of the resulting format 1 files).
Purge the format 2 files. If you leave any format 2 files intact, make a list of them
(using the WHERE FORMAT2 clause of D46 FUP) because it will be much harder to
identify them, and they might interfere with certain operations, after falling back.
New online dumps are not required for format 1 files when falling back. The TMFDR
fallback IPM skips over format 2 files when reading online dump tapes created
under D46. The fallback IPMs allow D46 audit (version R7) to be used for all forms of
TMF recovery.
Fallback from a product that contains support for format 2 files (such as D46) can only
be done to a product that contains fallback support or that has associated fallback
IPMs (such as D38, D44, or D45). The following products have fallback IPMs that you
must use when falling back to D38, D44, or D45:
•
DP2
•
BACKUP/RESTORE
•
TMF (7 IPMs)
•
RDF, if being used
Format 2 files are not supported in any products prior to D46. The fallback IPMs
achieve the following results to prevent failures associated with format 2 files or any of
their residual effects after falling back:
•
After a fallback, it is not possible for format 2 files to be involved in transactions, or
for audit records to be generated for format 2 files. You cannot create new
Format 2 files, or open or change the label of any remaining format 2 files that
were not purged before falling back. You can purge format 2 files after a fallback,
but no audit records will be generated for those purge operations.
•
After a fallback, all forms of TMF recovery will ignore format 2 files and all audit
records in the audit trail (prior to the fallback point) pertaining to format 2 files.
•
All TMF audit reading code will be able to read the new R7 audit format as well as
the R5/R6 formats, and will be able to handle switching between them in an audit
file.