TMF Reference Manual (G06.26+)

TMFCOM Commands
HP NonStop TMF Reference Manual—522418-003
3-60
ALTER AUDITTRAIL
can turn COMMITHOLDMODE to OFF for the master audit trail, you must turn
COMMITHOLDMODE to OFF for all auxiliary audit trails.
OFF
removes the specified audit trail from commit-hold mode, so that even if the
components needed to ensure ZLT for this audit trail on the backup system
become unavailable, transaction commit or abort can take place on the primary
system. If you specify COMMITHOLDMODE OFF, this action also saves the
current values in the TMF configuration for the timeout duration and timeout
action (SUSPEND or CRASH, described momentarily).
SUSPEND
temporarily suspends TMF from activated commit-hold status. You can only
specify SUSPEND for the master audit trail. However, SUSPEND suspends
activated commit-hold status on the entire TMF system, affecting all audit trails.
In other words, SUSPEND, like activated commit-hold status, has TMF system-
wide scope.
The SUSPEND option only applies if TMF is started, COMMITHOLDMODE
was set ON, and commit-hold was activated since the system components
needed to ensure ZLT became unavailable for at least one audit trail. If you
set COMMITHOLDMODE to SUSPEND under these conditions, the commit-
hold condition is temporarily suspended and transaction completion resumes
on the primary system.
SUSPEND removes the need for you to explicitly set COMMITHOLDMODE to
OFF in situations where you only want to drop TMF out of commit-hold status
on a transient basis. When the condition that activated commit-hold is
corrected for all relevant audit trails, TMF automatically changes
COMMITHOLDMODE to ON.
The originally assigned default for COMMITHOLDMODE is unconfigured, which is
equivalent to OFF for all audit trails.
While commit-hold is activated and COMMITHOLDMODE is not suspended,
certain other TMF operations (for example, ALTER BEGINTRANS or ADD
DATAVOLS) cannot be performed. A complete list of those prohibited operations
appears under COMMITHOLDMODE and COMMITHOLDTIMER Option
Considerations on page 3-68.
Note. Before you can set COMMITHOLDMODE to ON, you must mirror all the active
volumes for the audit trail.
Note. To determine which audit-trail has caused commit-hold to become activated,
use the STATUS AUDITTRAIL
command. If you specify SUSPEND when commit-
hold is not activated, TMF displays an error message.