G06.24 Release Version Update Compendium

Database and Transaction Processing Products
G06.24 Release Version Update Compendium—528616-003
4-3
Fallback
strategy, consider altering the audit-trail format at migration time, given that TMF is
already stopped. If not done at this time, altering the audit-trail configuration to enable
format 2 audit-trail files requires a STOP TMF command at a later time.
Altering the audit-trail format does not require a change in the audit-trail file size at this
time. With G06.24, the audit trail file size can be altered while TMF is started or
stopped. Therefore, you can alter the audit-trail configuration to format 2 at migration
time, and then later, while TMF is started, alter the file size on a per audit-trail basis to
the desired file size for that trail.
It is important to understand the fallback issues associated with changing the audit-trail
configuration by using the new features provided in G06.24. Altering the format of the
TMF audit-trail configuration at migration time might increase availability (that is, it
eliminates the need to STOP TMF at some later date), but falling back to a prior RVU
after altering the format is very complex and might require a DELETE TMF operation.
See Fallback on page 4-3 for details.
If a change in the TMF audit-trail configuration is not an important consideration at this
time, then there are no issues related to migration for TMF with G06.24.
Fallback
If no changes to the TMF audit-trail configuration are planned, there are no fallback
issues related to TMF in G06.24. You can migrate to G06.24 from a prior RVU and fall
back to that same RVU without issues related to TMF.
However, if changes to the audit-trail configuration are planned, such as altering the file
size of a given trail or changing the audit-trail configuration to use format 2 files, you
need to understand fallback issues.
A series of steps are involved and must be followed precisely if you fall back to a prior
RVU after executing either the ALTER AUDITTRAIL command with the new FILESIZE
option or the ALTER TMF command with the new ATFORMAT option. Executing a
DELETE TMF command might also be required if you alter the audit-trail format and
later find it necessary to fall back.
See the HP NonStop TMF Supplement for Large Audit-Trail Files for details about
falling back after using G06.24 TMF command options.