TMF Management Programming Manual (G06.26+)

Commands and Responses
HP NonStop TMF Management Programming Manual—522420-003
5-34
ALTER AUDITTRAIL
If the number of files is decreased, the action taken varies. Any preallocated
files on the active-audit volume are purged up to the point where each active
volume contains the new number of files per volume. If an active-audit volume
contains more files than allowed by the new value specified for this field, TMF
purges them (rather than renaming them) when they are no longer needed.
Increasing the value of ZFilesPerVolume is the recommended way of
increasing the audit trail capacity, if there is sufficient space on the currently
configured active-audit volumes. Using this technique evenly distributes the
new files among all volumes, rather than concentrating them on any added
volumes.
ZOverflowThreshold
specifies the percentage of audit trail capacity in use above which TMF begins
overflow copying. This field is optional. The minimum value is 50 (percent)
and the maximum value is 100 (percent); the value of ZTMF-VAL-ResetWord is
80 (percent).
ZBeginTransDisable
changes the threshold capacity at which new transactions are disallowed. The
minimum value is 50, and the maximum value is 100.
specifies the percentage of audit trail capacity that can be consumed before
TMF disables new transactions. When the consumed capacity exceeds this
threshold, new transactions are not allowed. When the consumed capacity
falls back below this threshold, new transactions are no longer disabled by
audit-trail usage. (However, new transactions can be disabled for other
reasons, as explained in the ALTER BEGINTRANS command.) The minimum
value is 50 (percent) and the maximum value is 100 (percent); the value of
ZTMF-VAL-ResetWord is 90 (percent).
ZAuditDump
specifies whether or not audit dumping is performed for the audit trail. During
audit dumping, TMF automatically copies to tape or disk an audit trail file that
has become full. The following values are valid:
If the value of this field is changed to ZSPI-VAL-True, the first file to be dumped
is the current audit trail file at the time of the ALTER AUDITTRAIL command.
If the value of this field is changed to ZSPI-VAL-False, all files that have
already been dumped will stay dumped. Any files which are not yet dumped
will not be dumped. If an audit dump is in progress, it is aborted.
ZSPI-VAL-True Audit dumping is enabled.
ZSPI-VAL-False Audit dumping is prevented.