Availability Guide for Change Management

Making Application Subsystem Changes Online
Availability Guide for Change Management–125506
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TMF Subsystem Changes You Can Perform Online
can be fully protected by NonStop TM/MP regardless of whether transactions are
initiated by a client (a PC, Macintosh, or workstation) or by a requester on a NonStop
system.
TMF Subsystem Changes You Can Perform Online
Making changes to the TMF subsystem does not require the NonStop system to be shut
down, and most changes can be made without affecting the availability of applications
that use the TMF subsystem. The following subsections describe common TMF
subsystem changes.
Changing the Audit-Trail Configuration
Audit-trail configuration changes affect the size and capacity of audit trails. You can
perform most audit-trail configuration changes while the TMF subsystem is running.
Some audit-trail configuration changes require the TMF subsystem to be stopped.
Stopping the TMF subsystem stops transaction processing. This action may cause your
transaction-processing applications to fail, so you may have to stop your applications
before stopping the TMF subsystem. If you must stop the TMF subsystem, choose a
time when the interruption will affect application users the least.
Table 4-3 summarizes the audit-trail configuration changes.
Table 4-3. Audit-Trail Configuration Changes
Impact on Availability
Type of change NonStop system Application
Adding or deleting an active audit
volume
Available Available
Adding or deleting an overflow audit
volume
Available Available
Adding or deleting a restore audit
volume
Available Available
Adding or deleting an entire audit
trail
Available Requires the TMF subsystem to
be stopped and the TMF
configuration to be deleted
Increasing or decreasing the number
of files that reside on each active
audit volume
Available Available
Increasing or decreasing the overflow
threshold
Available Available
Increasing or decreasing the begin-
transaction-disable threshold
Available Available
Setting or resetting audit-trail file
size
Available Requires the TMF subsystem to
be stopped and the TMF
configuration to be deleted