Every node application in a UTM cluster application has its own KDCFILE. Because some date applies locally at node level while other data is global to the cluster there are some differences compared to standalone applications:
Data that applies locally to the node is stored only in the KDCFILE of the relevant node application. Data that applies locally at node level includes, for example, TLS, asynchronous messages, background jobs and data relating to other node-bound services. The KDCFILEs of the individual node applications are not identical at runtime.
Data that applies globally to the cluster is stored in UTM cluster files, see section "UTM cluster files". This includes user data such as GSSB, ULS, users’ service data and passwords.'
The "memory" of a UTM cluster application therefore consists of the sum of all the local KDCFILEs and the UTM cluster files.
Please note that it is not possible to keep duplicate KDCFILEs in a UTM cluster application, i.e. there is only ever one KDCFILE for a node application.