TMF Planning and Configuration Guide (H06.05+)

Doing an Initial Configuration
HP NonStop TMF Planning and Configuration Guide—540136-002
2-3
Adding the Master Audit Trail (MAT)
either case, you can compensate for the miscalculation later by changing the file size,
changing the files for each active volume, or explicitly controlling when audit dumps
occur. These changes are discussed further in Number of Files Per Active Audit
Volume on page 3-3 and Managing Audit Dumps on page 5-4.
Number of Audit-Trail Files per Active-Audit Volume
You use the FILESPERVOLUME parameter of the ADD AUDITTRAIL command to
specify the number of audit-trail files on the active-audit volume.
The maximum number of audit-trail files per active-audit volume is either the size of the
active-audit volume divided by the file size value (rounded down) or 100, whichever
number is smaller. (TMF limits the number of files per active-audit volume to 100 or
fewer.)
The minimum number of files per active-audit volume is 1.
There must be at least three audit trail files defined for each configured audit trail (MAT,
AUX01, etc). That is, for a given audit trail the number of active volumes multiplied by
the FILESPERVOLUME value must be greater than or equal to 3. This may be
accomplished by configuring a single active volume with FILESPERVOLUME set to
three or more, by configuring two active volumes with FILESPERVOLUME set to two
or more, or by configuring at least three active volumes with FILESPERVOLUME set to
one or more.
If the active-audit volume has its own dedicated disk drive, use the maximum files per
active volume value; in all other cases, use the minimum files per active volume value.
Table 2-2 summarizes these guidelines.
Table 2-2. Number of Audit Files Per Active-Audit Volume
Files per Active
Volume Value
Maximum (Active-audit volume size ÷ file size (rounded down)) or 100,
whichever number is smaller
Minimum 1
Recommended If the active volume has its own dedicated disk drive, use the
maximum files per active volume; otherwise use the minimum
files per active volume.