TMF Supplement for Large Audit Files (G06.24+)

TMF Reference Manual
HP NonStop TMF Supplement for Large Audit-Trail Files—527391-001
5-18
ALTER AUDITTRAIL (Pages 3-51 through 3-60)
If you specify RESET MAXRETAINEDATFILES, any retained audit-trail files presently
on disk will be purged immediately after they are no longer needed.
FILESIZE Option Considerations
The FILESIZE option applies to both format 1 and format 2 audit-trail files. Format 1
and format 2 are disk partition formats that can range up to approximately 2 GB and
1024 GB in size, respectively. Larger format 2 files can help decrease the number of
audit-trail rollovers for systems that have high audit-generation rates. The file format
(format1 or format 2) is determined by the ATFORMAT option in the ALTER TMF
command.
If you do not specify a FILESIZE value in this ALTER AUDITTRAIL command, and
have not set this value in an earlier ALTER AUDITTRAIL command or in the ADD
AUDITTRAIL command that created the audit trail, TMF uses the originally assigned
default: files of 100 MB each (for format 1 files) or files of 1024 MB each (for format2
file).
The FILESIZE value affects only the active volumes for the audit trail identified in this
specific ALTER AUDITTRAIL command. When this command is run, the new
FILESIZE value becomes effective for all files that are subsequently renamed or
created for this audit trail, as follows:
•
When an existing audit-trail file is renamed forward during audit-trail rollover, and
this file has a different file size or format (format 1 or format 2) than the configured
values for these parameters, TMF creates a new renamed file of the configured
size and format, and purges the existing file.
•
When an existing audit-trail file is renamed forward during audit-trail rollover, and
this file has the same file size and format as the configured values, TMF simply
renames the file.
•
When new audit-trail files are preallocated, TMF creates them with the configured
file size for the specified audit trail and the format value currently in effect for the
TMF configuration. (Always remember that while the FILESIZE value applies to a
Note. You cannot use the ADD AUDITTRAIL command to set the MAXRETAINEDATFILES
value; the MAXRETAINEDATFILES option is only available with ALTER AUDITTRAIL.
Each time TMF is started, all audit-trail files on restore-audit volumes are purged automatically.
Thus, any subsequent recovery is always forced to restore any needed audit trails that were
dumped to tape.
Caution. If any audit-trail sequence number is 900,000 or more, TMF must be stopped and re-
configured with larger audit-trail sizes in the near future. TMF will stop abruptly, and cannot be
restarted when a sequence number reaches 999,999.