When you perform an online update, only the KDCFILE is regenerated and no changes are made to the UTM cluster files. As a result, the changes to the generation apply only to the KDCFILE.
You can perform an online update while the cluster application is running, i.e. at least one node application is always active during the update.
You can make the following changes without terminating the UTM cluster application:
Update generation of the KDCFILE for which it is not necessary to completely terminate the UTM cluster application, see below. This is the case for all changes that are not listed in the table on "Offline update of a UTM cluster application".
Increase in the size of the cluster page pool, see "Increasing the size of the cluster page pool".
Change to the application program, see "Change to the application program".