Availability Guide for Change Management

Making Application Subsystem Changes Online
Availability Guide for Change Management–125506
4-19
TMF Subsystem Changes You Can Perform Online
Changing the Data-Volume Configuration
Data-volume configuration changes can have various effects on the TMF subsystem.
For example, adding a data volume can potentially increase the number of audit records
generated. You can perform data-volume configuration changes while the TMF
subsystem is running. Depending on your application, some changes may require
application access to the data volume to be stopped.
Table 4-4 summarizes the data-volume configuration changes.
Changing the Autoabort Configuration
The TMF autoabort function automatically aborts transactions if they run longer than a
set amount of time. The time limit used to identify long-running transactions is known
as the autoabort threshold. This threshold specifies the length of time that a
transaction can run before the TMF subsystem automatically aborts it. You can change
the autoabort configuration attributes while the TMF subsystem is running.
Table 4-5 summarizes the autoabort configuration changes.
Changing the Audit-Dump Configuration
Audit-dump configuration attributes can be changed while the TMF subsystem is
running. Audit dumps preserve copies of audit-trail files for file recovery.
Table 4-6 summarizes the audit-dump configuration attribute changes.
Table 4-4. Data-Volume Configuration Changes
Impact on Availability
Type of change NonStop system Application
Adding or deleting a data volume Available Available.
Resetting the recovery mode Available Available.
Renaming a data volume Available Application access to the data
volume may need to be stopped
(renaming a data volume is
accomplished by deleting the data
volume and re-adding it with the
new name).
Moving a data volume to another
system
Available Application access to the data
volume may need to be stopped.
Table 4-5. Autoabort Configuration Changes
Impact on Availability
Type of change NonStop system Application
Increasing or decreasing the autoabort threshold Available Available
Resetting the autoabort value Available Available